Latest Discussions : Electrical & Lighting


06:40PM | 02/08/03
Member Since: 02/07/03
1 lifetime posts
When I replaced a hallway ceiling light with a new light fixture, I found that the insulation of the wire leads into the ceiling box were cracked (showing exposed metal) and discolored, apparently from overheating. The new light fixture had a warning label that said it should be connected to wires rated for 90C, and that most houses built before 1985 have wire rated for 60C. Is there any way I can check to find out if the wires in my house are rated for 60C or 90C (my house was built in 1979)? If they are rated for 60C, can I safely use the newer fluorescent bulbs (the ones that replace standard incandescent bulbs) in the ceiling lights, since the fluorescent bulbs supposedly run cooler (at least that's what I have read)? Many thanks for some advice on this.


04:03AM | 02/09/03
Member Since: 09/17/02
524 lifetime posts
If you can see the wire and is NM then it is only 60 degree. NM-B is the 90 degree wire. If the fixture says you need the 90 wire then you need the 90 wire. You don't know what bulb someone later on might intall.

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