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#213849 - 08/13/14 08:34 AM Specific wiring features in Arctic conditions
arctic_wire Offline
New Member
Registered: 08/13/14
Posts: 4
Loc: Russian Federation
Has anybody experience of open-air wiring works at winter time in Arctic? Need some advise...
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#213850 - 08/13/14 07:25 PM Re: Specific wiring features in Arctic conditions [Re: arctic_wire]
twh Offline
Member
Registered: 03/11/04
Posts: 901
Loc: Regina, Sask.
There are lots of cold places in US and Canada. Any questions in particular?
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#213851 - 08/13/14 11:07 PM Re: Specific wiring features in Arctic conditions [Re: arctic_wire]
Tesla Offline
Member
Registered: 06/16/04
Posts: 1273
Loc: Sacramento, CA
In my humble opinion, there is nothing I could explain to a Russian about the Arctic that he doesn't know even better than I.

I'm probably hardly alone in such sentiments, hence the lack of replies.
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Tesla
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#213852 - 08/15/14 02:58 AM Re: Specific wiring features in Arctic conditions [Re: twh]
arctic_wire Offline
New Member
Registered: 08/13/14
Posts: 4
Loc: Russian Federation
Originally Posted By twh
There are lots of cold places in US and Canada. Any questions in particular?


Yes! I do have specific questions! smile

Of course, we in Russia have experience in arctic projects, however... perhaps there are some techniques which we're simply nor aware of.

Major problem in cabling works is quite a limited period for open-air installations - eventually 1-1,5 months, as soon as nearly all types of cables allow bending at +5oC and above, whilst thousands of kilometers should be installed on the open racks at heights, during at least 7-8 months.

I'm not aware of any other techniques of working at low temperatures than:
- unwinding cable rolls in heated temporary shelters;
- making long-range tents (tonnels) from Al-laminated plastic film around cable trays. The latter is very costly and labour-taking...;
- hot air-blowing from air guns along the cable tray at certain distance.

Anything else?

Perhaps there are some special cable marks/brands/types? Please advise...
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#213863 - 08/18/14 12:46 AM Re: Specific wiring features in Arctic conditions [Re: arctic_wire]
sparkyinak Offline
Member
Registered: 07/08/07
Posts: 1307
Loc: Alaska
What voltage will you be working at?
_________________________
"Live Awesome!" - Kevin Carosa
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#213865 - 08/18/14 11:07 PM Re: Specific wiring features in Arctic conditions [Re: arctic_wire]
arctic_wire Offline
New Member
Registered: 08/13/14
Posts: 4
Loc: Russian Federation
Sorry for delay - 24 V DC (controls), 220 V AC, 380 V AC (power mains)
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#213866 - 08/19/14 12:34 AM Re: Specific wiring features in Arctic conditions [Re: arctic_wire]
sparkyinak Offline
Member
Registered: 07/08/07
Posts: 1307
Loc: Alaska
Take a look at this

Ultraflex Blue
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#213873 - 08/20/14 07:47 PM Re: Specific wiring features in Arctic conditions [Re: arctic_wire]
Scott35 Offline

Broom Pusher and
Member
Registered: 10/19/00
Posts: 2707
Loc: Anaheim, CA. USA
We have used "FREP Cable" for connecting Power (Branch Circuitry) and Control Circuitry drops to Evaporators in -40C environments, where XHHW Insulated Conductors installed in LFMC and LFNMC experienced rapid failure.

I do not remember the Company we ordered this Cable from, but try a Google Search for "FREP Cable".
("FREP" being an Acronym for the Cable Jacket & Conductor Insulation material)

The Cable we purchased had a flexibility rating down to -60C (flexible without cracking), which the Temperature is, by all means, best referred to as:
"Beyond Frikken Cold!!!"
shocked blink

Good luck.

--Scott (EE)
_________________________
Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!
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#213876 - 08/21/14 04:25 AM Re: Specific wiring features in Arctic conditions [Re: Scott35]
arctic_wire Offline
New Member
Registered: 08/13/14
Posts: 4
Loc: Russian Federation
OK, thanks! Last questions: You just pulled both cable types with rolls or manually? Was there any pre-heating for cable drums?
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#213884 - 08/22/14 06:04 PM Re: Specific wiring features in Arctic conditions [Re: arctic_wire]
twh Offline
Member
Registered: 03/11/04
Posts: 901
Loc: Regina, Sask.
I wonder if some information can flow in the other direction.

I work in a place where we get below -30c only a couple weeks per year and hit -40c/-40F only for a day or two. Those are the worst days of my life.

Do you have any tips for clothing? How about fire retardant clothing that needs to "breathe"?

In my younger days, my hands would heal from the cracking in a couple days. Now, it takes a week. What do your "old guys" use for bleeding hands?
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