Old 06-25-01, 06:38 AM
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My home was built in 1979. What does the supply wire rating warning mean? I purchased a halogen light fixture and am now paranoid to put it up. How can I tell what type of wiring I have? Do I really need an electrician at this point? Or, can I see the type of wiring I've got?

If you know what I should be looking for or if I should steer clear of this one, I'd greatly appreciate it.

Old 06-25-01, 12:30 PM
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Your nonmetallic sheathed cable [Romex]installed in the era that you mentioned is indeed 60 degree C. rated. The fixture you mentioned has a warning from the manufacturer to protect the fanny telling you about the 60 C rating of some Romex. Your fixture has been UL approved for connection with 90 degree C rated wire. The wiring you have installed was approved wiring at the time your house was wired. Therefore the term existing should come into play. Existing in commonly accepted as if it was legal when it was installed then forever it be unless you change the integrity of that existing wiring by adding load or new service equipment, etc.

To solve your 60 degree where 90 degree rated wiring is called for by the manufacturer. Just move the existing box and its existing wiring into an area that is accessible. Then buy a new piece of nonmetallic sheathed cable manufactured today that is now 90 degree rated. Install that new piece of wire as an extension from that old box relocated and made into an accessible junction to the new box you just installed to mount your new fixture to for mounting means of that new fixture. Now you have a 90 degree wire as the Manufacturer recommends.

The old Romex was called Type NM cable, the new Romex is now called type NMB cable.

Hope this helps

Old 06-25-01, 02:54 PM
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you have caught onto on of the biggest conspiracy's ever !

lighting fixtures, due to heat captivation, require the newer 90 deg wire.

The NRTL's list them as such

The makers usually include this somewhere in their instructions, not on the box, or front page, but usually some small electro-leagalesse jargon in small print.

How many Lighting shops, Home Depots, etc ask these specifics during a renovation???

How many homeowners read the instructions?

For that matter, how many tradesmen?


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