Is there some code requirements for spacing a wire and the hot pipe?
I did a 12 gauge wiring in the bathroom. After finishing, I found that
I had the wire and CPVC hot water line too close - at some places
they are as close as only 1" apart. I just don't want to rewire the
whole thing, if it is not necessary.
Thanks for any info.
Insulating hot water pipes is always a good thing for
But wiring in general (ROMEX notably) certainly can take boiling
water and more. If you're running water at boiling, then you'll
have other problems than power :).
I figured wrapping the pipes would make him feel better, and was a good
idea anyway for saving energy. I'm not sure what romex is rated for,
but it's probably at least 75 C. It can surely handle more than that,
but at some point you'd have to derate it.
When the electrician wired my water heater, he taped the incoming Romex to
the hot water pipe. I think the Romex is probably rated for 100 degrees C,
although I can't say for sure. I'm assuming a licensed electrician knows the
code and knew what he was doing. I questioned it and he said it would be ok
and it appears to be ok. However, it's out in the open where it can easily
be changed. Might be different buried in a wall.
Not really. The safe use temperature rating let's the user know that it
won't degrade over time when used below that temperature at the rated
current. One must consider that the rise in temperature due to current is
additive to ambient. With a high ambient temperature, one would have to
consider the derating curve. The melting point is well above the safe use
point. Above that is the temperature at which it will support combustion.
The insulation in Romex (NM-b) is 90c rated. That is the ambient air plus
resistive heating. I doubt there is going to be that much heat transfer in free
air but if these are bundled in an enclosed space it *might* be an issue.
The standard non-metallic sheathed cable sold in Canada is rated at
90C, by code, to withstand possible temperatures within enclosed light
fixtures. "90" is printed on it as part of its markings. I would
expect it to be pretty much the same stuff sold in the U.S., so
eyeball it and if you see the "90", then that's what you've got. 90C
is over 190F.
Having said that, the pipe wrap sounds like a good idea to me.
Your light bulbs will be hotter when you touch them........
You will get a shock everytime you touch the hot water too.....
I'd recommend you have the house demolished and start over, doing it
right next time.
Some of life's lessons are hard to take....
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