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Wire Connections

 
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Old 04-19-2011, 03:54 PM   #1
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Wire Connections


just a quick question. I was going to install a ceiling light. The directions state a hazard warning that the wiring for the new light is rated at 105 degrees celcius, but in most older homes the wiring is rated at only 60 degrees c. This house was built in 83 and the wiring is typical 14 guage house wire. Is it safe to connect the new light to the old existing wiring. I guess I have never seen this warning before ( or maybe I just don't read directions!). Was there a reason for that warning or is just a CYA issue...Thanks. John B.
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Old 04-19-2011, 04:59 PM   #2
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Re: Wire Connections


You'd be hard-pressed to find a traditional dwelling wiring method using insulation rated more than 90C. That requirement (for NM cable) was initiated in the 1978 NEC. Although 105C conductors exist, they're an extreme rarity in dwellings.

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Old 04-19-2011, 05:19 PM   #3
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Re: Wire Connections


So I assume it is OK to hook up this light just like any other new fixture that I have done in the past, yes?
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Old 04-19-2011, 05:23 PM   #4
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Re: Wire Connections


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Originally Posted by jbosseler View Post
So I assume it is OK to hook up this light just like any other new fixture that I have done in the past, yes?
That depends. Did you hook them up correctly?

Yeah, should be fine.
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Old 04-19-2011, 05:43 PM   #5
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Re: Wire Connections


Have not wired it up yet. The homeowner bought the fixture, a cheapo from IKEA and he read the directions prior to showing them to me... The wiring on the fixture itself is the usual guage that comes on every small light fixture, and like I said, the house wire is typical 14-2 romex.
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Old 04-19-2011, 06:09 PM   #6
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Re: Wire Connections


The instructions should say something about 90C conductors, not 105. Pre-1978 NM wiring had no insulation rating, and that date should also be mentioned.

I'm wondering if the 105C means the conductors of the fixture itself.
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Old 04-19-2011, 08:36 PM   #7
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Re: Wire Connections


Just hook up the fvckin light.
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Old 04-19-2011, 09:48 PM   #8
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Re: Wire Connections


Yeah.. just hook the damn thing up. We don't care if your house burns down.
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Old 04-19-2011, 11:51 PM   #9
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Re: Wire Connections


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Yeah.. just hook the damn thing up. We don't care if your house burns down.
His house? Heck if that's the case this should be on the DIY forum not CT!
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Old 04-20-2011, 10:11 AM   #10
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Re: Wire Connections


Thanks for the insight, didnt help much...
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Old 04-20-2011, 11:49 AM   #11
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Re: Wire Connections


I've done several of these over the last 8 years, ignored the warning, and never caused a house to burn down.

But one thing that I read in an instruction manual was that if you didn't have 105C wire, they wanted you to replace it at a junction that was at least 24" away from the fixture. So essentially they were saying that you could replace the line all the way back to the switch or you could install a junction box in the ceiling.. or if you wanted to do a semi-hack jackleg job, (looking the other way pretending that I am not about to say this) you could splice 2 feet of newer wire to the older wire and slide the excess down the open area in the ceiling.
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Old 04-20-2011, 12:24 PM   #12
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Re: Wire Connections


I'm just a licensed master electrician with years of experience, so what do I know?

I'll just shut up now.
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Old 04-20-2011, 01:24 PM   #13
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Re: Wire Connections


thanks Ted, I appreciate your input and will go forward...

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