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Old 02-08-2017, 03:16 PM   #1
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Thought I would pass this along re Cold Temperatures
Email from the BCSA this morning.

It is the time of year to remember that Nonmetallic sheathed cable can be damaged if installed outside of the manufacturers recommended limits for cold weather. Generally NMSC cable is ok for installation in temperatures between minus 10-15 Celsius. Some manufacturers have different values but all are affected by cold temperatures outside of the manufacturers guidelines. Specific information can be found online from a couple of cable manufacturers but minus 10 seems to be a common value found on most manufacturers websites. Damage to outer cable jackets will require replacement of the cables as that is the Flame spread portion of the cable and once the cable is compromised the cable is no longer approved.

If possible have the buildings you are working in over the cold snap heated to above -10 for installation of NMSC.

Try to adhere to the manufacturers recommendations, compromised cable jackets are a real concern and can lead to many failures going forward including promotion of flame spread or conductor damage.

Please forward this to all colleagues that do NMSC wiring, residential contractors, etc.

Last edited by electricguy; 02-08-2017 at 03:27 PM.
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Old 02-08-2017, 03:31 PM   #2
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Wow, that really doesn't seem all that cold.
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Old 02-08-2017, 03:35 PM   #3
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We pulled some Cat5 out of the truck where it had been the night before, and the insulation cracked off it during a pull.....~CS~
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Old 02-08-2017, 03:39 PM   #4
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We pulled some Cat5 out of the truck where it had been the night before, and the insulation cracked off it during a pull.....~CS~

You're just pulling too hard!
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Old 02-08-2017, 03:49 PM   #5
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You're just pulling too hard!
Cat 5 and LVT are the worst. The insulation breaks when you bend it.
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Old 02-08-2017, 06:22 PM   #6
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I put a sticker on so it will stay in the top to remind other peoples about the cold weather situation reguarding of NMSC or other type of conductors.
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Old 02-08-2017, 06:39 PM   #7
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It's a shame the NMSC can't handle the cold temps.......cuz I really
love rough'n in a house when it's -25C....and stays colder inside
than out.
P&L
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Old 02-08-2017, 08:57 PM   #8
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Quote:
Originally Posted by chicken steve View Post
We pulled some Cat5 out of the truck where it had been the night before, and the insulation cracked off it during a pull.....~CS~
Pulled some Cat 6 the other day at -15c.
Had the conduit run all around the roof and the cable sitting in the warm building.
No cracks but we pulled like crazy before the cable cooled off.
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Old 02-08-2017, 09:00 PM   #9
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Quote:
Originally Posted by PlugsAndLights View Post
It's a shame the NMSC can't handle the cold temps.......cuz I really
love rough'n in a house when it's -25C....and stays colder inside
than out.
P&L
Hmmm, roughing in a house or terminating an AHU on a roof
Pretty tough choice unless you consider wind chill
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Old 02-09-2017, 09:54 PM   #10
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Same with teck cable. We stop outdoors work at -25C unless we have the spools in a heated tent (forgot the trade name for the heated tent). Gotta get the oil outta the ground.
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Old 02-09-2017, 10:14 PM   #11
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Quote:
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Same with teck cable. We stop outdoors work at -25C unless we have the spools in a heated tent (forgot the trade name for the heated tent). Gotta get the oil outta the ground.
It's called the "hide in here for 10hrs OT and make $2000 tent".
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Old 02-09-2017, 10:32 PM   #12
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Pass my thanks along to BCSA for the reminder. But I won't be needing it. If it's that cold where I need to install the cable, I'll just toss another log on the fire and berate Chicken Steve for his nonsensical bullcrap.
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Old 02-09-2017, 11:59 PM   #13
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Same with teck cable. We stop outdoors work at -25C unless we have the spools in a heated tent (forgot the trade name for the heated tent). Gotta get the oil outta the ground.
Hoarding tent, and we made $1 per minute, not including OT @ 1.5 on 12 hour days. Fridays and Saturdays were 12 hours each at $1.50 per minute. Those were the days and may never be seen again in my lifetime.
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Old 02-10-2017, 12:02 AM   #14
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How has Mac not replied to this.... 80 degrees and nice waves... something to that effect?
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Old 02-10-2017, 08:36 AM   #15
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Quote:
Originally Posted by chicken steve View Post
We pulled some Cat5 out of the truck where it had been the night before, and the insulation cracked off it during a pull.....~CS~
We had a similar situation years ago. It cracked when you shot the staple from a staple gun. The entire sheathing was falling apart
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Old 02-10-2017, 08:36 AM   #16
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We used nm cable below 20° and it was not fun.
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Old 02-10-2017, 09:50 AM   #17
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We used nm cable below 20° and it was not fun.
You should not install at low temps. The boss should know better
Conductor — a wire or cable, or other form of metal, installed for the purpose of conveying electric current from one piece of electrical equipment to another or to ground.
12-102 Insulated conductors (see Appendix B) Rule 12-102. For conductors, with or without a low temperature mark, the minimum recommended handling and installation temperature is –10 °C. Where marked –25 °C or –40 °C, the conductor could be handled and installed at temperatures lower than –10 °C; however, appropriate care should be taken.

12-102 Insulated conductors
(1) Insulated conductors shall not be installed during any time when the ambient temperature is sufficiently low as to be liable to cause damage to the insulation.
(2) Such conductors shall not be installed so as to permit flexing or movement of the conductors after installation if the ambient temperature is liable to become low enough to damage the insulation during flexing or movement.

Just saying
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Old 02-10-2017, 09:57 PM   #18
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Hmmm, roughing in a house or terminating an AHU on a roof
Pretty tough choice unless you consider wind chill
That I have done in everything from rain to an ice storm to get heat on to medical facilities mostly.

The extra pay is nice.
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Old 03-06-2017, 12:32 AM   #19
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Romex SIMpull NMD90 from Southwire Canada states the lowest install temp @ -25° C for two conductor and -10°C for three-conductor, and to store @ +0°C for 24 hours beforehand.
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