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Old 07-27-2014, 09:01 PM   #1
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re: older NMD 60 cable question


i have a wall i wish to insulate with roxul safe and sound. I have some old cable NMD-60 that is hooked up to stove in that wall. (i don't know the gauge off hand). I want to know if i should avoid insulating this area, or is it safe to insulate around NMD-60

Is there something i could do if it is not safe? like maybe putting some PVC pipe around it?

thanks

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Old 07-27-2014, 10:19 PM   #2
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re: older NMD 60 cable question


You are OK to insulate around it.

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Old 07-27-2014, 11:24 PM   #3
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re: older NMD 60 cable question


If you do feel the need to put something "around" it (not sure how you'd get it around it), please please PLEASE don't use regular white PVC pipe. Someday a plumber will thank you for not killing him or killing his sawzall....or, to a lesser extent, some electrician will thank you for not causing him to waste time looking for the wire that "should be right next to this pipe".

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Old 07-28-2014, 01:12 AM   #4
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re: older NMD 60 cable question


Okay, I figured out what Roxal is, but what is NMD 60 ? Google comes up with nothing relevant.
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Old 07-28-2014, 01:19 AM   #5
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re: older NMD 60 cable question


In context, I'd say it's Non-Metallic cable, type D (Romex suitable for damp locations, used only Canada), with conductors rated for 60C, as opposed to the 90C rating of modern NMD90.
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Old 07-28-2014, 07:10 AM   #6
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re: older NMD 60 cable question


NMD60 is the Canadian equivalent of NM cable. Non Metalic Dry, 60C temp rating.
The cable for wet locations would be NMW.
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Old 07-28-2014, 09:27 AM   #7
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re: older NMD 60 cable question


so should it be protected with anything?
I would have thought this to be dangerous given the 60 deg celcius rating
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Old 07-28-2014, 10:12 AM   #8
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re: older NMD 60 cable question


The question was is it safe to insulate around it. The answer is yes.

The part about the conduit is not relevant since it is safe to insulate around it.
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Last edited by joed; 07-28-2014 at 10:14 AM.
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Old 07-28-2014, 05:48 PM   #9
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re: older NMD 60 cable question


It's legal(USA) to insulate around it. There's an interesting thread in the Mike Holt forum about whether it's safe. British code from what I'm told requires treating the conductor as though it had only half its free-space current rating if it's buried in insulation. Field experience suggests that light-duty light and plugs circuits don't have a problem in practice but service entrances and high-current industrial cable can overheat. http://forums.mikeholt.com/showthread.php?t=162956
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Old 07-28-2014, 06:55 PM   #10
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re: older NMD 60 cable question


Service entrance cable and wires in conduit can NOT be insulated entering a building in Canada.
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Old 07-29-2014, 08:48 AM   #11
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re: older NMD 60 cable question


Quote:
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Service entrance cable and wires in conduit can NOT be insulated entering a building in Canada.
so you are saying my situation is neither, so it should be okay.
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Old 07-29-2014, 09:09 AM   #12
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re: older NMD 60 cable question


You are fine to insulate the NMD60.

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