ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Photo Editing Software?
by Fridayrack - 12/03/21 05:05 AM
Square D "All-In-One" Panelboard
by NORCAL - 11/30/21 12:48 PM
Where is Everyone?
by luckyshadow - 11/21/21 10:14 AM
It's been an interesting career
by The Watt Doctor - 11/19/21 09:56 AM
Well I am back to stay (nearly 6 years)
by The Watt Doctor - 11/19/21 09:17 AM
New in the Gallery:
240/208 to a house
240/208 to a house
by wa2ise, October 9
Now you know.
Now you know.
by Tom_Horne, September 7
Who's Online Now
1 members (Scott35), 18 guests, and 11 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#13308 08/30/02 12:05 AM
Joined: Aug 2002
Posts: 25
J
Joule-E Offline OP
Member
I run #12 NM using 3 wire to run 120V smokes and share with a lighting circuit. The smokes have #18 wires to tie into. I am wondering about this reduced wire size being an issue. I know the things dont use much juice, but it seems odd to tie in #18 to a 15 or 20 Amp circuit. Is this a bad design or do the smokes' wires in the J-box count as part of the internal workings of the fixture?

Is there an article on this issue I can read up on?

Thanks in advance.

[This message has been edited by Joule-E (edited 08-30-2002).]

#13309 08/30/02 09:20 AM
Joined: Apr 2002
Posts: 2,527
B
Moderator
Treat it like a light fixture. Don't worry about protecting the small wire from overloads.

OTOH, the 18AWG conductors are considered adequately protected for short circuits by a 20-amp overcurrent device. It’s sort of a juggling act, I agree.

I don’t know if the detector and 115V pigtail can fail in any mode to start a fire. {?}


Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
richard
richard
L.I. New York
Posts: 99
Joined: August 2003
Top Posters(30 Days)
dsk 2
NORCAL 1
Popular Topics(Views)
286,557 Are you busy
218,974 Re: Forum
205,093 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5