HI I have a question about wiring.I had a electrician rewire my house
and he had to drill holes in the joists in the basement and feed wire
through it.There is ductwork that comes in contact with this wire NMD
90 ? from the furnace.Will it melt the pvc off the wire??
He and another guy said no.Should I be worried??
If it is rated at 90 deg. C, that would equal 194 F.
I have never seen any wire insulation melt from a heating duct. I have seen
it melt from ceiling and wall light fixtures. Also inside of a kitchen
range (insulation shrunk even though it was supposed to be high heat
"Dave" wrote in message
Canadian electrical code requires that the wire be "isolated" from
contacting heating ducts. This is more likely to be an issue of
vibration in the ducting wearing off insulation, rather than having
the duct melt the insulation.
While the duct would only get hot enough to melt insulation if something
majorly wrong was happening with the furnace, it doesn't hurt to avoid
adding "kabooms" to the "melts"... ;-)
Standard (fully approved) practise here is to take a wad of fiberglass
bat insulation and just jam it between the wire and the ducting as a
US code doesn't appear to require it, but it's not a bad idea.
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.
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