ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

Topic Options
Rate This Topic
#7246 - 01/26/02 10:18 AM Fixture wires
aldav53 Offline
Member
Registered: 08/22/01
Posts: 545
Loc: Chandler, AZ USA
I often wondered why fixture wires (usually 18g or smaller) are allowed to be tied to a 15 or 20a ckt. Would'nt there be a potential for the hot wire heating up if it came in contact with ground before the circut had a chance to blow?
_________________________
The Golden Rule - "The man with the gold makes the rule"
Top
Work Gear for Electricians and the Trades
#7247 - 01/26/02 10:26 AM Re: Fixture wires
George Corron Offline
Member
Registered: 05/16/01
Posts: 717
Loc: Lorton, Va USA
Same principle as allowing your lamps to be fed with #18 or 20 zip cord. The load is definitely limited to the appliance (100 watt bulb, ballast, etc.)and there has been very little problem with any "hazard" associated.
Also, don't forget the ballasts are protected with a thermal element, so think of it like the 10 and 25 foot tap rule.

In the case of a fault, probably gonna burn itself clear before any real damage can occur, but that is why you have to be very cautious with fixtures above flammables.

For a piece of history, flourescents did not use to have Class P (Protected) ballasts when I came around the trade, and lotsa people would not allow them in their barns, houses, etc. because they had been known to cause fires.
Top

Member Spotlight
Member Since: 02/23/13
Posts: 204
New in the Gallery:
SE cable question
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box


Who's Online
0 registered (), 48 Guests and 12 Spiders online.
Key: Admin, Global Mod, Mod
 
New in the Gallery:
SE cable question
 
Top Posters (30 Days)
Admin 47
HotLine1 43
gfretwell 19
Ruben Rocha 12
Trumpy 9
 
Newest Members
KrmtFrg, Stack, Scotto, Freecrowder, clee512

ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals