adding new light fixture to 30 amp circuit

Reply

  #1  
Old 01-14-12, 12:07 PM
B
Member
Thread Starter
Join Date: Jul 2011
Location: USA
Posts: 66
Received 0 Votes on 0 Posts
adding new light fixture to 30 amp circuit

I want to add a pendant light over my dining table. I'll install a new box in the attic but the closest power is a box on a 30 amp circuit that powers the gas furnace. Is there any reason I shouldn't run off this circuit? The light fixture will never have more than a 100w bulb and will be controlled by a dimmer.

Also, if any of you generous neighbors could provide a diagram that goes power from box to fixture and from box to switch I'd be grateful just to double check my thinking. MANY thanks.
 
Sponsored Links
  #2  
Old 01-14-12, 12:34 PM
ray2047's Avatar
Member
Join Date: Mar 2006
Location: USA
Posts: 33,597
Received 13 Votes on 11 Posts
Is there any reason I shouldn't run off this circuit?
Yes. By code 120v lighting circuits are limited to 20 amps max. The fixtures and switches usually used are not rated for 30 amp. It is bad practice and usually a code violation to tap off a dedicated circuit such as your furnace circuit.

You need to find another source of power. A light fixture on a non-restricted circuit accessible from the attic that has power coming into it not the switch would be an example.

 

Last edited by ray2047; 01-15-12 at 05:33 PM.
  #3  
Old 01-15-12, 03:44 PM
pcboss's Avatar
Forum Topic Moderator
Join Date: Jul 2002
Location: Maryland
Posts: 15,151
Received 87 Votes on 74 Posts
You cannot tap the 30 amp circuit. It is prohibited as Ray has said.

Also there is a good chance the circuit is 240 and not 120 so you would not have a neutral.
 
Reply
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: