Return to the Electrical Wiring Forum | Post a Follow-Up

 o
How to tell black wire from black wire?

Posted by andee (My Page) on
Thu, May 27, 10 at 9:58

I'm replacing a light switch in the bathroom. The existing switch has two black wires and I don't know which should go to the red wire and which to the black wire of the new dimmer switch.

The existing switch has one black wire that comes from the wall (along with a white wire for the receptacle) and is screwed at the top of the switch. The second black wire attached to the bottom is also attached to the bottom of the adjacent fan switch. The fan switch top black wire disappears behind the receptacle.

Can anyone help sort this out for me? Thanks!


Follow-Up Postings:

 o
RE: How to tell black wire from black wire?

Doesn't really matter, but connect the black from the dimmer to the black that goes to each switch, and the red from the dimmer to the single black.


 o
RE: How to tell black wire from black wire?-OK!

Hey Normel, it worked! And the house didn't blow up and I quit sweating. Thanks so much -- I'll do another one.


 o
RE: How to tell black wire from black wire?

If the house blows up, just swap the wires :-)


 o
RE: How to tell black wire from black wire?

lol... or what's left of them.


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Electrical Wiring Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here