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Electrical Wire and Cable


Adding a New Circuit to the Main Panel for a Garage Panel

Mike in Florida asks: I have the electrical main coming into an exterior panel, and being back-fed into a 125 AMP breaker. This then flows through the panel itself and into a sub-panel just inside the building.


Adding a Breaker for a Garage Panel
Electrical Question: Can I use the main panel’s unused circuit breaker slots to install a breaker for a sub-panel?

I have the electrical main coming into an exterior panel, and being back-fed into a 125 AMP breaker. This then flows through the panel itself and into a sub-panel just inside the building. In the main panel the neutral and ground is wired to the same bus bar. The sub-panel is fed from this main panel and also has a 125 AMP breaker. My sub-panel is full but I need to pull 240V from somewhere. Can I use the main panel’s unused slots of which there are 6 knock-outs remaining?

This electrical wiring question came from Mike, a Homeowner in Orlando , Florida.

Additional Comments: It is handy to be able to actually ask an electrician something!

Dave’s Reply:
Thanks for your electrical wiring question Mike.

Adding a New Circuit to a Main Panel

Application: Adding a New Circuit to a Main Panel.
Skill Level: Advanced – Not recommended for homeowners, This project is best performed by a Licensed Electrical Contractor, or Certified Electrician.
Electrical Tools Required: Basic Electricians Pouch Hand Tools, Voltage Tester, and appropriate Safety Gear.
Estimated Time: Depends on the personal level experience, ability to work with tools, install electrical circuit wiring, and the available access to the project area.
Electrical Safety: Identify the electrical power source to the Main Panel, turn it OFF and Tag with a Note before working with the electrical wiring.
Electrical Wiring Parts and Materials: Electrical parts and materials for the Main Panel should be approved for the specific project and compliant with local and national electrical codes.
Electrical Codes and Inspections: Installing or changing home electrical wiring should be done according to local and national electrical codes as adopted in Orlando, Florida. A permit and inspections may also be required.

See more about Home Wiring for Florida

Adding a New Circuit to a Main Panel for a Sub Panel

This electrical wiring project is about adding a New Circuit to a Main Panel for a Sub Panel in a Detached Garage of an Old Home.

The existing Main Panel:
main electrical panel

Adding a New Circuit Breaker
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Great for any Home Wiring Project.


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Complete Guide to Home Electrical Wiring

Perfect for Homeowners, Students,
Handyman, Handywomen, and Electricians
Includes:
Wiring GFCI Outlets
Wiring Home Electric Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring Light Switches
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Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.

Electrical Tip

The Safest Way to Test Electrical Devices and Identify Electric Wiring!

The Non-Contact Electrical Tester
This is a testing tool that I have had in my personal electrical tool pouch for years, and is the first test tool I grab to help identify electrical wiring. It is a Non-contact tester, [amazon.com], I use for the detection of Standard Voltage in Cables, Cords, Circuit Breakers, Lighting Fixtures, Switches, Outlets and Wires. Simply insert the end of the tester into an outlet, lamp socket, or hold the end of the tester against the wire you wish to test. Very handy and easy to use.



« How Can I Light Up a Dark Hallway at Night for my Child? Adding Electric Wiring to a Garage »

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