Electrician Training Electrical Certification wiring recessed light fixtures Electrical Wiring Electrical Troubleshooting and Electrical Repairs wire outdoor light fixture Home Electrical Wiring Diagrams
wiring home generator and transfer switch wiring a 220 volt range cord outlet Wiring for GFCI Outlets Wiring Outlets and a Switched Outlet Wiring and Installing Ceiling Fans and Remote Controls wire dimmer switch wiring diagrams for switches wiring a dryer cord and 220 outlet circuit breaker panel
Electrical Wire and Cable

Installing a Dimmer Switch for a Light Fixture

I am replacing a dimmer switch that controls a light fixture and an outlet. In addition, there is one more black lead that goes somewhere

Dimmer Switch Wiring

Question: I am replacing a dimmer switch that controls a light fixture and an outlet. In addition, there is one more black lead that goes somewhere, not sure where. So while replacing the dimmer, I thought I would separate out the outlet from the light fixture. I have removed a pig tail to the switch and left with 4 black wires. I turned the breaker back on to figure out which black wire is the source back to the breaker. I can touch one wire to two others and get 120 volts on the MM. On the third wire, I get just under 40 volts. What causes only a 40 volt reading on the circuit?

This electrical question came from: Jason, a Homeowner from Whitefield, New Hampshire

See more about Home Wiring for New Hampshire

Additional Comments: Nice resource!

Dave’s Reply:
Thanks for your electrical question Jason

The Following links will assist you with your electrical question:

Wiring a Dimmer Switch
wiring-a-dimmer-switch

3 Way Dimmer Switch Wiring Diagram

Fully explained 3 way dimmer switch wiring diagram will take the mystery out of wiring a 3-way dimmer switch.


« Installing a Used Ceiling Fan Without a Wiring Diagram Vanity Light Location for Illumination »

Learn How to Wire it Right with my
Complete Guide to Home Electrical Wiring
Perfect for Homeowners, Students,
Handyman, Handywomen, and Electricians
Includes:
Wiring GFCI Outlets
Wiring Home Electrical Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring 3-Wire and 4-Wire Electric Range
Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet
How to Troubleshoot and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
Electrical Codes for Home Electrical Wiring
....and much more.

Click here to learn more about Home Electrical Wiring
  repair electrical wiring  

Not the answer you're looking for?
Browse other questions in the following categories:

Electrical Repair

Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.

See more about Electrical Wiring in Your Local Area

COMMENTS and QUICK QUESTIONS:

If you are asking a Quick Question please make sure it is about This TOPIC:
“Installing a Dimmer Switch for a Light Fixture”

Comments Posted here are Open for Quality Discussion and Participation.
PLEASE NOTE: WE DO NOT PUBLISH 3RD PARTY SPAM COMMENTS, TRACK-BACKS OR LINKS.



By submitting you agree to our Site Terms