Fix a Bathroom Light Fixture
Electrical Question: How can I fix a bathroom light fixture and exhaust fan that has stopped working?
Bathroom Light Fixture Problem #1
- I have a 1975 townhouse, and as a single mom I find myself having to learn and do a lot of things by myself.
- My daughter’s bathroom has both a fan and light switch (single-pole wall switch).
- The fan was not working so I thought I would replace the single switch for the fan.
- I had forgot to turn off the circuit power at the electrical panel and there was just a little spark–I know, Be Careful.
- Well now the fan works, but the light does not.
- The two slot receptacle (15 amps, 120 volts) works fine, but it also affected the light in my bathroom and the GFCI receptacle.
- I have aluminum wiring and if there is a overload it trips, but I know it is not the fuse because everything else is working.
- I have been researching I think it has to do with the GFCI am I on the right track?
This electrical wiring question came from Ingrid, a Homeowner from Virginia Beach, Virginia.
Bathroom Light Fixture Problem #2
My bathroom light fixture or the light switch not working.
- The receptacle next to the light switch is working.
- The lights suddenly quit working the other night, as well as the light over the shower. There is no power to the switch either.
- The circuit from the breaker box labeled ‘Bath’ energizes the working receptacle, but where does the power come from for the fixtures?
- All the GFI outlets check out OK.
- No other problem areas.
This electrical wiring question came from Beki in Henderson, Nevada.
Bathroom Lights and Outlets Problem #3
My downstairs bathroom lights and outlets in the neighboring bedroom stopped working. The GFCI outlet in the bathroom still works but must be on a different circuit.
I had an electrician come over and he removed the wall plate for the light and fan switches and “pulled out” the switches. The electrician didn’t disconnect the switches, he unscrewed them from the box and pulled them out. A few minutes later without doing anything the lights started working again. This was fine for several months, but now the bathroom lights and bedroom outlets stopped working again.I’ve checked the circuit breakers, turned everything in the house off and then on again, but still no lights in the bathroom.How can I go about troubleshooting this? Is there a special kind of electrician I need to hire?
This electrical wiring question came from Jim in Livermore, California.
The Bathroom and Bedroom Lights are Not Working
- The lights in three bedrooms and a bathroom are not working.
- The circuit breaker for these areas is on.
- When we tested the black wire and white wire both read 120 volts.
- The outlets are also not working in these areas.
- How should I fix this?
This electrical wiring question came from Chandy, a Handyman in Chandler, Arizona.
Dave’s Reply:
Thank you for your electrical wiring questions.
How to Repair a Bathroom Light Problem
Application: How to Repair a Bathroom Light Circuit and Bath Exhaust Fan Problem.
Skill Level: Intermediate to Advanced. This electrical wiring project is best performed by a Licensed Electrical Contractor or Certified Electrician.
Tools Required: Basic Electricians Pouch Hand Tools and Voltage Tester.
Estimated Time: Depends on personal level experience, ability to work with hand tools and electrical troubleshooting skills.
Precaution: Identify the circuit breaker, turn it OFF, and then Tag it with a Note before performing any wiring or inspections or repairs.
The Most Common Problems with Bathroom Light Fixtures and How to Fix Them
A GFCI Receptacle Outlet is Tripped Off
At the GFCI outlet for the bathroom press the Test button, then the Reset Button. If the GFCI does not reset then the GFCI outlet may need to be replaced. If the GFCI resets OK then see if the bathroom light fixture is working. If not the GFCI still may have a problem – maybe. Bathroom light fixtures are not required to be protected by GFCI unless the fixture is in close proximity to the bathtub or shower.
A GFCI Circuit Breaker is Tripped Off
Some homes may have the bathroom ground fault protection provided by a GFCI circuit breaker which is located at the main panel or a sub panel.There will be a TEST button near the switch of the circuit breaker. If the circuit breaker is tripped the switch will be in the middle position.
- To reset the GFCI circuit breaker push the switch into the full OFF position, then push the switch into the ON position.
- If the GFCI breaker does not reset then there may be a fault within the Circuit Breakers Used for Electrical Wiring bathroom circuit wiring, or the GFCI circuit breaker may faulty and require replacing.
- If the GFCI breaker resets OK then see if the bathroom light fixture is working.
NOTE: GFCI circuit breakers should be tested about every month to ensure proper operation and reliability.
ELECTRICAL TIP: A GFCI outlet in the bathroom is much more convenient than a GFCI circuit breaker located in a panel. Discuss this option with your local electrician.
Faulty Light Switch
The light switch should be tested to see if it is getting power to one of the terminals. If not then the source of power needs to be identified. It’s all a process of elimination, but yes – you have to know where to start, and of course that is always at the electrical panel and identifying the circuit. If the switch does have power then turn it on – is there power to the other terminal? If not then the light switch needs to be replaced.
Burned Out Light Bulbs
If there is power then the light bulb may be out. Believe it or not, I have been paid to discover that a customer’s light bulb was burnt out, and one time the customer’s light switch was in the off position – true story, the customer insisted that I bill him due to his oversight. So I did.
Problem with Light Fixture Wiring or Wire Splices
Wall mounted and ceiling mounted light fixtures may produce a lot of heat from the light bulbs that can lead to damaged wire insulation, bad wire splices, and burnt wire connections.
Bathroom light fixture(s) should be unfastened so the wiring and wire splice connections may be inspected. Faulty connections or wiring should be repaired using approved electrical parts of the same circuit ratings. Make sure the light bulbs of the fixture are the appropriate size to prevent overheating and further damage.
Separate Light Circuit
Many bathroom outlets may be wired with a separate circuit and may not branch to the light and exhaust fan. If the switch does have power then turn it on – is there power to the other terminal? If not then the light switch needs to be replaced.
-
Bathroom Electrical Wiring
- Fully Explained Photos and Wiring Diagram Layouts for Bathroom Electrical Wiring with Code Requirements for most new or remodel projects.
How to Repair Home Electric Wiring
-
Troubleshooting and Repairing Electrical Wiring
- Licensed Electrician Reveals the Secrets of Successful Electrical Troubleshooting methods that are used to solve the majority of the home electrical problems and wiring failures encountered.
How to Wire a Light Switch
Electrical Safety Around the Home
Home Electrical Safety
Electrical Safety Articles covering several topics of home electrical safety and Do-It-Yourself Electrical Safety
-
How to Wire a Light Switch – Diagram 1
- Fully Explained Light Switch Wiring Diagrams. Detailed Electrical Wiring Diagrams and Pictures assist your Home Electrical Projects.
How to Wire a GFCI Outlet
-
GFCI and GFI Wiring Diagrams
- The features and benefits of GFCI outlets and receptacles will give you a clear understanding of why these safety devices are required by code and how they are important to help protect you and your family against accidental electrical shock hazards.
- GFCI Wiring
- This list of articles will help you learn about the features and benefits provided by GFI and GFCI Receptacles and how they are wired.
How to Install Home Lighting
Planning and Installing Home Lighting
Home lighting articles covering recessed lighting, under cabinet lighting, lighting terminology and more.
How to Install Home Lighting
Lighting Electrical Codes
Fix a Bathroom Light Fixture
Electrical Question: How can I fix a bathroom light fixture and exhaust fan that has stopped working?
Bathroom Light Fixture Problem #1
- I have a 1975 townhouse, and as a single mom I find myself having to learn and do a lot of things by myself.
- My daughter’s bathroom has both a fan and light switch (single-pole wall switch).
- The fan was not working so I thought I would replace the single switch for the fan.
- I had forgot to turn off the circuit power at the electrical panel and there was just a little spark–I know, Be Careful.
- Well now the fan works, but the light does not.
- The two slot receptacle (15 amps, 120 volts) works fine, but it also affected the light in my bathroom and the GFCI receptacle.
- I have aluminum wiring and if there is a overload it trips, but I know it is not the fuse because everything else is working.
- I have been researching I think it has to do with the GFCI am I on the right track?
This electrical wiring question came from Ingrid, a Homeowner from Virginia Beach, Virginia.
Bathroom Light Fixture Problem #2
My bathroom light fixture or the light switch not working.
- The receptacle next to the light switch is working.
- The lights suddenly quit working the other night, as well as the light over the shower. There is no power to the switch either.
- The circuit from the breaker box labeled ‘Bath’ energizes the working receptacle, but where does the power come from for the fixtures?
- All the GFI outlets check out OK.
- No other problem areas.
This electrical wiring question came from Beki in Henderson, Nevada.
Bathroom Lights and Outlets Problem #3
My downstairs bathroom lights and outlets in the neighboring bedroom stopped working. The GFCI outlet in the bathroom still works but must be on a different circuit.
I had an electrician come over and he removed the wall plate for the light and fan switches and “pulled out” the switches. The electrician didn’t disconnect the switches, he unscrewed them from the box and pulled them out. A few minutes later without doing anything the lights started working again. This was fine for several months, but now the bathroom lights and bedroom outlets stopped working again.I’ve checked the circuit breakers, turned everything in the house off and then on again, but still no lights in the bathroom.How can I go about troubleshooting this? Is there a special kind of electrician I need to hire?
This electrical wiring question came from Jim in Livermore, California.
The Bathroom and Bedroom Lights are Not Working
- The lights in three bedrooms and a bathroom are not working.
- The circuit breaker for these areas is on.
- When we tested the black wire and white wire both read 120 volts.
- The outlets are also not working in these areas.
- How should I fix this?
This electrical wiring question came from Chandy, a Handyman in Chandler, Arizona.
Dave’s Reply:
Thank you for your electrical wiring questions.
How to Repair a Bathroom Light Problem
Application: How to Repair a Bathroom Light Circuit and Bath Exhaust Fan Problem.
Skill Level: Intermediate to Advanced. This electrical wiring project is best performed by a Licensed Electrical Contractor or Certified Electrician.
Tools Required: Basic Electricians Pouch Hand Tools and Voltage Tester.
Estimated Time: Depends on personal level experience, ability to work with hand tools and electrical troubleshooting skills.
Precaution: Identify the circuit breaker, turn it OFF, and then Tag it with a Note before performing any wiring or inspections or repairs.
The Most Common Problems with Bathroom Light Fixtures and How to Fix Them
A GFCI Receptacle Outlet is Tripped Off
At the GFCI outlet for the bathroom press the Test button, then the Reset Button. If the GFCI does not reset then the GFCI outlet may need to be replaced. If the GFCI resets OK then see if the bathroom light fixture is working. If not the GFCI still may have a problem – maybe. Bathroom light fixtures are not required to be protected by GFCI unless the fixture is in close proximity to the bathtub or shower.
A GFCI Circuit Breaker is Tripped Off
Some homes may have the bathroom ground fault protection provided by a GFCI circuit breaker which is located at the main panel or a sub panel.There will be a TEST button near the switch of the circuit breaker. If the circuit breaker is tripped the switch will be in the middle position.
- To reset the GFCI circuit breaker push the switch into the full OFF position, then push the switch into the ON position.
- If the GFCI breaker does not reset then there may be a fault within the Circuit Breakers Used for Electrical Wiring bathroom circuit wiring, or the GFCI circuit breaker may faulty and require replacing.
- If the GFCI breaker resets OK then see if the bathroom light fixture is working.
NOTE: GFCI circuit breakers should be tested about every month to ensure proper operation and reliability.
ELECTRICAL TIP: A GFCI outlet in the bathroom is much more convenient than a GFCI circuit breaker located in a panel. Discuss this option with your local electrician.
Faulty Light Switch
The light switch should be tested to see if it is getting power to one of the terminals. If not then the source of power needs to be identified. It’s all a process of elimination, but yes – you have to know where to start, and of course that is always at the electrical panel and identifying the circuit. If the switch does have power then turn it on – is there power to the other terminal? If not then the light switch needs to be replaced.
Burned Out Light Bulbs
If there is power then the light bulb may be out. Believe it or not, I have been paid to discover that a customer’s light bulb was burnt out, and one time the customer’s light switch was in the off position – true story, the customer insisted that I bill him due to his oversight. So I did.
Problem with Light Fixture Wiring or Wire Splices
Wall mounted and ceiling mounted light fixtures may produce a lot of heat from the light bulbs that can lead to damaged wire insulation, bad wire splices, and burnt wire connections.
Bathroom light fixture(s) should be unfastened so the wiring and wire splice connections may be inspected. Faulty connections or wiring should be repaired using approved electrical parts of the same circuit ratings. Make sure the light bulbs of the fixture are the appropriate size to prevent overheating and further damage.
Separate Light Circuit
Many bathroom outlets may be wired with a separate circuit and may not branch to the light and exhaust fan. If the switch does have power then turn it on – is there power to the other terminal? If not then the light switch needs to be replaced.
-
Bathroom Electrical Wiring
- Fully Explained Photos and Wiring Diagram Layouts for Bathroom Electrical Wiring with Code Requirements for most new or remodel projects.
How to Repair Home Electric Wiring
-
Troubleshooting and Repairing Electrical Wiring
- Licensed Electrician Reveals the Secrets of Successful Electrical Troubleshooting methods that are used to solve the majority of the home electrical problems and wiring failures encountered.
How to Wire a Light Switch
Electrical Safety Around the Home
Home Electrical Safety
Electrical Safety Articles covering several topics of home electrical safety and Do-It-Yourself Electrical Safety
-
How to Wire a Light Switch – Diagram 1
- Fully Explained Light Switch Wiring Diagrams. Detailed Electrical Wiring Diagrams and Pictures assist your Home Electrical Projects.
How to Wire a GFCI Outlet
-
GFCI and GFI Wiring Diagrams
- The features and benefits of GFCI outlets and receptacles will give you a clear understanding of why these safety devices are required by code and how they are important to help protect you and your family against accidental electrical shock hazards.
- GFCI Wiring
- This list of articles will help you learn about the features and benefits provided by GFI and GFCI Receptacles and how they are wired.
How to Install Home Lighting
Planning and Installing Home Lighting
Home lighting articles covering recessed lighting, under cabinet lighting, lighting terminology and more.
How to Install Home Lighting
Lighting Electrical Codes
Installing Bathroom Electrical Wiring
Electrical Question: How much does it cost me for the electrical work done in my bathroom?
- Install two new plugs in dining room.
- Install new GFI plug.
- Hang new light fixture.
- Provide and install new fan, just basic.
This electrical wiring question came from: Rachel, a Homeowner from Portland, Oregon.
Additional Comments: Very Good.
Dave’s Reply:
Thanks for your Electrical Wiring Question Rachel.
Bathroom Remodel Electrical Wiring
The Key Cost Factors for Bathroom Remodel Electrical Wiring
Rachael, the key factors that will affect how much it will cost to install electrical wiring for a bathroom remodel project are base on a number of things, including: Home structure type and available access for installing the required electrical wiring. With most remodel projects that require electrical wiring, labor is typically the major cost. The amount of labor that will be required to install the electrical wiring and devices will be directly affected by the amount of access or lack of access to perform and install the necessary electrical wiring. Preexisting conditions that apply to the home remodel project will need to be identified and dealt with as well in order to make the electrical wiring safe and up to the current building codes.
Labor and Material Charges for Remodel Electrical Wiring
The more access there is the faster the work may be performed. If the electrician will be required to climb into the attic, crawl under the house and fish new electrical wiring into existing walls that are finished off with sheet rock or other wall coverings then the time that it will take to do the job will be greatly affected. Depending on the extent of the remodel project, it may be beneficial to remove same wall coverings which will allow full access to the walls where it may be required to install electrical wiring and perhaps new or additional plumbing.
The complete individual project should be carefully examined by an experienced licensed general contractor who is fully aware of the challenges of home remodeling and what will be required in order to produce what the homeowner desires. To summarize this question I will state that each remodel project has its own variables and factors which must be identified before an accurate cost estimate can be produced, and these factors will then be relative to the equipment and devices that are required or desired, all of which must be installed according to a permitted plan which will require approvals and inspections by the local building authority.
The Danger of Unqualified Workers
A seasoned contractor is well aware of the worn out comment “it will only take you a few minutes” which most likely comes from a person who has no idea about what is truly involved to do the job, when in reality a can of worms may be discovered due to previous unscrupulous projects which may have been installed by unqualified individuals which will require corrections.
More about Bathroom Electrical Wiring
How to Install Bathroom Electrical Wiring
Bathroom Electrical Wiring
Fully Explained Photos and Wiring Diagrams for Bathroom Electrical Wiring with Code Requirements for most new or remodel projects.
Lighting For The Home
Lighting Electrical Codes
Wiring GFI Outlets
GFCI and GFI Wiring Diagrams
The features and benefits of GFCI outlets and receptacles will give you a clear understanding of the importance why these safety devices are required by code to help protect you and your family against accidental electrical shock hazards.
GFCI Wiring
This list of articles will help you learn about the features and benefits provided by GFI and GFCI Receptacles and how they are wired.
You identified your project to be about Electrical Wiring, so you might find this information useful:
Electrical Wiring
Electrical Wiring
Home electrical wiring projects with pictures and wiring diagrams.
Installing Bathroom Electrical Wiring
Electrical Question: How much does it cost me for the electrical work done in my bathroom?
- Install two new plugs in dining room.
- Install new GFI plug.
- Hang new light fixture.
- Provide and install new fan, just basic.
This electrical wiring question came from: Rachel, a Homeowner from Portland, Oregon.
Additional Comments: Very Good.
Dave’s Reply:
Thanks for your Electrical Wiring Question Rachel.
Bathroom Remodel Electrical Wiring
The Key Cost Factors for Bathroom Remodel Electrical Wiring
Rachael, the key factors that will affect how much it will cost to install electrical wiring for a bathroom remodel project are base on a number of things, including: Home structure type and available access for installing the required electrical wiring. With most remodel projects that require electrical wiring, labor is typically the major cost. The amount of labor that will be required to install the electrical wiring and devices will be directly affected by the amount of access or lack of access to perform and install the necessary electrical wiring. Preexisting conditions that apply to the home remodel project will need to be identified and dealt with as well in order to make the electrical wiring safe and up to the current building codes.
Labor and Material Charges for Remodel Electrical Wiring
The more access there is the faster the work may be performed. If the electrician will be required to climb into the attic, crawl under the house and fish new electrical wiring into existing walls that are finished off with sheet rock or other wall coverings then the time that it will take to do the job will be greatly affected. Depending on the extent of the remodel project, it may be beneficial to remove same wall coverings which will allow full access to the walls where it may be required to install electrical wiring and perhaps new or additional plumbing.
The complete individual project should be carefully examined by an experienced licensed general contractor who is fully aware of the challenges of home remodeling and what will be required in order to produce what the homeowner desires. To summarize this question I will state that each remodel project has its own variables and factors which must be identified before an accurate cost estimate can be produced, and these factors will then be relative to the equipment and devices that are required or desired, all of which must be installed according to a permitted plan which will require approvals and inspections by the local building authority.
The Danger of Unqualified Workers
A seasoned contractor is well aware of the worn out comment “it will only take you a few minutes” which most likely comes from a person who has no idea about what is truly involved to do the job, when in reality a can of worms may be discovered due to previous unscrupulous projects which may have been installed by unqualified individuals which will require corrections.
More about Bathroom Electrical Wiring
How to Install Bathroom Electrical Wiring
Bathroom Electrical Wiring
Fully Explained Photos and Wiring Diagrams for Bathroom Electrical Wiring with Code Requirements for most new or remodel projects.
Lighting For The Home
Lighting Electrical Codes
Wiring GFI Outlets
GFCI and GFI Wiring Diagrams
The features and benefits of GFCI outlets and receptacles will give you a clear understanding of the importance why these safety devices are required by code to help protect you and your family against accidental electrical shock hazards.
GFCI Wiring
This list of articles will help you learn about the features and benefits provided by GFI and GFCI Receptacles and how they are wired.
You identified your project to be about Electrical Wiring, so you might find this information useful:
Electrical Wiring
Electrical Wiring
Home electrical wiring projects with pictures and wiring diagrams.
Guide to Light Fixture Wiring Connections
Electrical Question: I am installing a light fixture in the bathroom and the light fixture contains a white wire, a black wire and a yellow/green wire.
- The box contains 3 white wires that are together, 2 black wires that are together, and a red wire and black wire that are together.
- The box also contains a copper wire attached to a screw and 2 copper wires attached to another screw.
- How do I attach to my white wire , black wire , and the yellow/green wire?
- I have tried many different ways and it is shorting the main breaker.
This electrical wiring question came from: Nadia, a Homeowner from Canada
Dave’s Reply:
Thanks for your electrical wiring question Nadia.
How to Connect Light Fixture Wiring
Preparation
Skill Level: Beginner to Intermediate.
Tools Required: Basic Electricians Pouch Hand Tools, a non-aluminum ladder and Voltage Tester.
Estimated Time: Depends on personal level experience, ability to work with tools and access to the light fixture(s).
Precaution: Identify the lighting circuit, turn it OFF and Tag it with a Note before working with the wiring.
Notice: Installing additional fixture wiring should be done with a permit and be inspected.
How to Determine the Cause of a Tripping Circuit Breaker for a Bathroom Light
- If the circuit breaker is tripping OFF then this may be an indication of a direct short which would be caused by not having the circuit wiring connections configured correctly.
- The wires used for switching should be identified which will help determine the correct wiring connections.
- The circuit wiring should be verified using a voltage tester.
A Direct Short condition which will cause a circuit breaker to trip may be caused by:
- A hot wire connected to a ground wire or grounded source.
- A hot wire connected to a neutral wire.
- Two separate circuits connected together.
- A fault within the electrical circuit or the device being connected.
NOTE: An overloaded circuit may also cause a circuit breaker to trip as well.
IMPORTANT: If you are tripping the main breaker then please call an electrician for help.
Light Fixture Wiring Connections
The following connections are typical for 120 volt light fixtures and wiring diagrams may be reviewed for further understanding.
- The Black wire of the fixture is for the power connection which typically connects to the black wire of the electrical box.
- The white wire of the light fixture is the neutral which connects to the white neutral wire of the electrical box.
- The green/yellow wire of the light fixture is the ground which connects to the green or bare copper wires which are typically all splice together.
Additional Electrical Question about Bathroom Electrical Wiring
- Bathroom Light Fixture Wire Size
Question: While adding an outlet to my bathroom I noticed that while the house (built in 1954) is wired with 14/2 (with a black woven cover), the previous owner rewired a lamp with an outlet by the mirror with 12/2 Romex. In other words the last 6′ of this run is heavier gauge than the original wiring. Is this OK?
- Answer: Adding a 12/2 cable onto a 14/2 circuit cable is not the typical practice, however in this case where the additional cable is larger then it is OK as long as the size of the circuit protection of a fuse or circuit breaker remains the same, as in this case of #14 gauge wiring the circuit protection rating should be 15 amps.
- When branching onto an existing circuit it is best to stay with the original wire gauge.
- Keep in mind that the circuit protection should be sized to the smallest gauge wire within the circuit with the exception of light fixture lead wires.
- It should also be noted that when adding a 2-wire cable that has a ground wire onto existing circuit wiring that does not have a ground wire, and a ground wire is not going to be installed and bonded with the electrical ground system, then the ground wire of the added cable should be cut off so that it does not give a false indication that the circuit is grounded.
More about Wiring a Bathroom Light Fixture
Light Switch Wiring
Wiring a Light Switch – Diagram 1
Fully explained pictures and wiring diagrams about wiring light switches describing the most common switches starting with photo diagram 1.
Voltage Tester
- Electrical Safety and Voltage Testers
- When working on home electrical wiring, quality voltage testers can play an important part in electrical safety.
- Electrical testers enable you to identify electrical circuits and help prevent the possibility of accidental electrical shock.
Bathroom electrical wiring
Bathroom Electrical Wiring Requirements
This wiring diagram and pictures explain the basic bathroom electrical code wiring requirements required for most new or remodel projects. Give your bathroom a face lift when you enhance the electrical devices that will bring out the best in you. Make your eyes sparkle with get a breath of fresh air when you install one of these smart upgrades.
For more information about Electrical Wiring
Electrical Wiring
Electrical Wiring
Home electrical wiring projects with pictures and wiring diagrams.
This link is helpful as a Homeowner
Do-It-Yourself Electrical
Guide to Light Fixture Wiring Connections
Electrical Question: I am installing a light fixture in the bathroom and the light fixture contains a white wire, a black wire and a yellow/green wire.
- The box contains 3 white wires that are together, 2 black wires that are together, and a red wire and black wire that are together.
- The box also contains a copper wire attached to a screw and 2 copper wires attached to another screw.
- How do I attach to my white wire , black wire , and the yellow/green wire?
- I have tried many different ways and it is shorting the main breaker.
This electrical wiring question came from: Nadia, a Homeowner from Canada
Dave’s Reply:
Thanks for your electrical wiring question Nadia.
How to Connect Light Fixture Wiring
Preparation
Skill Level: Beginner to Intermediate.
Tools Required: Basic Electricians Pouch Hand Tools, a non-aluminum ladder and Voltage Tester.
Estimated Time: Depends on personal level experience, ability to work with tools and access to the light fixture(s).
Precaution: Identify the lighting circuit, turn it OFF and Tag it with a Note before working with the wiring.
Notice: Installing additional fixture wiring should be done with a permit and be inspected.
How to Determine the Cause of a Tripping Circuit Breaker for a Bathroom Light
- If the circuit breaker is tripping OFF then this may be an indication of a direct short which would be caused by not having the circuit wiring connections configured correctly.
- The wires used for switching should be identified which will help determine the correct wiring connections.
- The circuit wiring should be verified using a voltage tester.
A Direct Short condition which will cause a circuit breaker to trip may be caused by:
- A hot wire connected to a ground wire or grounded source.
- A hot wire connected to a neutral wire.
- Two separate circuits connected together.
- A fault within the electrical circuit or the device being connected.
NOTE: An overloaded circuit may also cause a circuit breaker to trip as well.
IMPORTANT: If you are tripping the main breaker then please call an electrician for help.
Light Fixture Wiring Connections
The following connections are typical for 120 volt light fixtures and wiring diagrams may be reviewed for further understanding.
- The Black wire of the fixture is for the power connection which typically connects to the black wire of the electrical box.
- The white wire of the light fixture is the neutral which connects to the white neutral wire of the electrical box.
- The green/yellow wire of the light fixture is the ground which connects to the green or bare copper wires which are typically all splice together.
Additional Electrical Question about Bathroom Electrical Wiring
- Bathroom Light Fixture Wire Size
Question: While adding an outlet to my bathroom I noticed that while the house (built in 1954) is wired with 14/2 (with a black woven cover), the previous owner rewired a lamp with an outlet by the mirror with 12/2 Romex. In other words the last 6′ of this run is heavier gauge than the original wiring. Is this OK?
- Answer: Adding a 12/2 cable onto a 14/2 circuit cable is not the typical practice, however in this case where the additional cable is larger then it is OK as long as the size of the circuit protection of a fuse or circuit breaker remains the same, as in this case of #14 gauge wiring the circuit protection rating should be 15 amps.
- When branching onto an existing circuit it is best to stay with the original wire gauge.
- Keep in mind that the circuit protection should be sized to the smallest gauge wire within the circuit with the exception of light fixture lead wires.
- It should also be noted that when adding a 2-wire cable that has a ground wire onto existing circuit wiring that does not have a ground wire, and a ground wire is not going to be installed and bonded with the electrical ground system, then the ground wire of the added cable should be cut off so that it does not give a false indication that the circuit is grounded.
More about Wiring a Bathroom Light Fixture
Light Switch Wiring
Wiring a Light Switch – Diagram 1
Fully explained pictures and wiring diagrams about wiring light switches describing the most common switches starting with photo diagram 1.
Voltage Tester
- Electrical Safety and Voltage Testers
- When working on home electrical wiring, quality voltage testers can play an important part in electrical safety.
- Electrical testers enable you to identify electrical circuits and help prevent the possibility of accidental electrical shock.
Bathroom electrical wiring
Bathroom Electrical Wiring Requirements
This wiring diagram and pictures explain the basic bathroom electrical code wiring requirements required for most new or remodel projects. Give your bathroom a face lift when you enhance the electrical devices that will bring out the best in you. Make your eyes sparkle with get a breath of fresh air when you install one of these smart upgrades.
For more information about Electrical Wiring
Electrical Wiring
Electrical Wiring
Home electrical wiring projects with pictures and wiring diagrams.
This link is helpful as a Homeowner
Do-It-Yourself Electrical
Troubleshooting a Bathroom Light Fixture
[ad#block] Electrical Question: I have 2 bathrooms with no lights working. Each has 8 bulb light fixtures with no power on the strip for the lights. The exhaust fans work fine and the electrical outlets work fine. No circuit breakers are tripped off. All the other lights and fixtures in house and garage are working fine. Just no bathroom lights. The lights worked this morning but I returned from work and they are out.
This electrical repair question came from: Tommy, a Homeowner from Las Vegas, Nevada.
How to Get Your Bathroom Lights Working
Application: Testing Bathroom Light Switches.
Skill Level: Intermediate to Advanced – Best performed by a Licensed Electrical Contractor.
Tools Required: Basic Electricians Pouch Hand Tools and Voltage Tester.
Estimated Time: Depends on personal level experience, ability to work with hand tools and electrical troubleshooting skills.
Precaution: Identify the lighting circuit, turn it OFF and then Tag it with a Note before performing any wiring or switch testing.
Why Bathroom Lights May Not Work
- To Repair Bathroom Lighting that is not working I would start with the obvious:
- Make sure all the light bulbs are screwed in all the way,
- Next the light switch should be checked for power coming in and leaving up to the light fixtures.
- This calls for troubleshooting using the process of elimination, which you will find using the links below.
More about Repairing a Bathroom Light Fixture
How to Install Bathroom Electrical Wiring
Bathroom Electrical Wiring
Fully Explained Photos and Wiring Diagrams for Bathroom Electrical Wiring with Code Requirements for most new or remodel projects.
Troubleshooting Electrical Wiring
- Troubleshooting Electrical Wiring
- Licensed Electrician Reveals the Secrets of Successful Electrical Troubleshooting Methods used to solve the majority of the home electrical problems and wiring failures encountered.
Troubleshooting a Bathroom Light Fixture
[ad#block] Electrical Question: I have 2 bathrooms with no lights working. Each has 8 bulb light fixtures with no power on the strip for the lights. The exhaust fans work fine and the electrical outlets work fine. No circuit breakers are tripped off. All the other lights and fixtures in house and garage are working fine. Just no bathroom lights. The lights worked this morning but I returned from work and they are out.
This electrical repair question came from: Tommy, a Homeowner from Las Vegas, Nevada.
How to Get Your Bathroom Lights Working
Application: Testing Bathroom Light Switches.
Skill Level: Intermediate to Advanced – Best performed by a Licensed Electrical Contractor.
Tools Required: Basic Electricians Pouch Hand Tools and Voltage Tester.
Estimated Time: Depends on personal level experience, ability to work with hand tools and electrical troubleshooting skills.
Precaution: Identify the lighting circuit, turn it OFF and then Tag it with a Note before performing any wiring or switch testing.
Why Bathroom Lights May Not Work
- To Repair Bathroom Lighting that is not working I would start with the obvious:
- Make sure all the light bulbs are screwed in all the way,
- Next the light switch should be checked for power coming in and leaving up to the light fixtures.
- This calls for troubleshooting using the process of elimination, which you will find using the links below.
More about Repairing a Bathroom Light Fixture
How to Install Bathroom Electrical Wiring
Bathroom Electrical Wiring
Fully Explained Photos and Wiring Diagrams for Bathroom Electrical Wiring with Code Requirements for most new or remodel projects.
Troubleshooting Electrical Wiring
- Troubleshooting Electrical Wiring
- Licensed Electrician Reveals the Secrets of Successful Electrical Troubleshooting Methods used to solve the majority of the home electrical problems and wiring failures encountered.
Installing a Wall Fixture Electrical Junction Box
Electrical Question: I am trying to replace and old bathroom lighting fixture which is attached to a medicine cabinet.
- It is one piece and the whole unit has been removed.
- The medicine cabinet will be replaced by a regular mirror and I want to install a new light fixture and center it above the mirror.
- There is a stud where the mirror must be centered.
- There are water pipes running along either side of the stud.
- I was told to use a pancake junction box but my new fixture has 4 black, 4 white and a ground wire.
- I’m sure it would be a code violation to try to shove all those wires into the pancake.
- The pancake is 4″.
- What is the maximum number of wires that can go into the pancake?
- Is there another alternative?
It seems I may have to look for a different fixture with fewer wires.
Thanks!
This electrical question came from: Stu, a Homeowner from Meriden, CT
See more about Home Wiring for Connecticut
Dave’s Reply:
Thanks for your electrical question Stu.
How to Install a Wall Fixture Electrical Junction Box
- The links below will give you all that you need, but typically the light fixture has an area where the wires from the wall pancake box can be routed into and the connections can usually be made inside the light fixture, otherwise your right, the pancake box is not large enough.
- If the light fixture is a bar type then a larger junction box can be installed off center if the fixture will allow a hole to be drilled in line with the wall box for the wiring to pass through into the wall box for the connections.
- If this is done the hole should have an insulated bushing installed to protect the wiring.
The Following will assist you with your Bathroom Electrical Wiring
Electrical Code for How Many Wires in Junction Boxes
Electrical Code
Lighting For The Home
Lighting Electrical Codes
Electrical wire
Electrical Wire for the Home
Complete listing of electrical wire types and parts used for home projects with electrical code information serves as selection guidelines.
junction boxes
Electrical Junction Boxes for Home Wiring
- Understanding electrical junction boxes and what they are used for. Home electrical wiring is the process of installing electrical wire to a location that will serve electrical devices or an appliance.
- One very important component is the box where the wire will be installed. The type and size of the home wiring electrical boxes will depend upon the circuit size, application and its location.
How to Install Bathroom Electrical Wiring
Bathroom Electrical Wiring
Fully Explained Photos and Wiring Diagrams for Bathroom Electrical Wiring with Code Requirements for most new or remodel projects.
Electrical code
Electrical Code Articles
- Electrical Code Directory covering AFCI circuit, electrical-boxes, electrical-circuit, electrical-code-outlets.
- Electrical GFCI, electrical-grounding, electrical-project.
- Electrical-services, electrical-underground, electrical-wiring.
- Electrical-wiring-code, lighting-code, smoke-detectors.
For more information about Electrical Wiring
Electrical Wiring
Electrical Wiring
Home electrical wiring projects with pictures and wiring diagrams.
Installing a Wall Fixture Electrical Junction Box
Electrical Question: I am trying to replace and old bathroom lighting fixture which is attached to a medicine cabinet.
- It is one piece and the whole unit has been removed.
- The medicine cabinet will be replaced by a regular mirror and I want to install a new light fixture and center it above the mirror.
- There is a stud where the mirror must be centered.
- There are water pipes running along either side of the stud.
- I was told to use a pancake junction box but my new fixture has 4 black, 4 white and a ground wire.
- I’m sure it would be a code violation to try to shove all those wires into the pancake.
- The pancake is 4″.
- What is the maximum number of wires that can go into the pancake?
- Is there another alternative?
It seems I may have to look for a different fixture with fewer wires.
Thanks!
This electrical question came from: Stu, a Homeowner from Meriden, CT
See more about Home Wiring for Connecticut
Dave’s Reply:
Thanks for your electrical question Stu.
How to Install a Wall Fixture Electrical Junction Box
- The links below will give you all that you need, but typically the light fixture has an area where the wires from the wall pancake box can be routed into and the connections can usually be made inside the light fixture, otherwise your right, the pancake box is not large enough.
- If the light fixture is a bar type then a larger junction box can be installed off center if the fixture will allow a hole to be drilled in line with the wall box for the wiring to pass through into the wall box for the connections.
- If this is done the hole should have an insulated bushing installed to protect the wiring.
The Following will assist you with your Bathroom Electrical Wiring
Electrical Code for How Many Wires in Junction Boxes
Electrical Code
Lighting For The Home
Lighting Electrical Codes
Electrical wire
Electrical Wire for the Home
Complete listing of electrical wire types and parts used for home projects with electrical code information serves as selection guidelines.
junction boxes
Electrical Junction Boxes for Home Wiring
- Understanding electrical junction boxes and what they are used for. Home electrical wiring is the process of installing electrical wire to a location that will serve electrical devices or an appliance.
- One very important component is the box where the wire will be installed. The type and size of the home wiring electrical boxes will depend upon the circuit size, application and its location.
How to Install Bathroom Electrical Wiring
Bathroom Electrical Wiring
Fully Explained Photos and Wiring Diagrams for Bathroom Electrical Wiring with Code Requirements for most new or remodel projects.
Electrical code
Electrical Code Articles
- Electrical Code Directory covering AFCI circuit, electrical-boxes, electrical-circuit, electrical-code-outlets.
- Electrical GFCI, electrical-grounding, electrical-project.
- Electrical-services, electrical-underground, electrical-wiring.
- Electrical-wiring-code, lighting-code, smoke-detectors.
For more information about Electrical Wiring
Electrical Wiring
Electrical Wiring
Home electrical wiring projects with pictures and wiring diagrams.
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