Extension cord under the snow...... - Page 3 - Fiberglass RV


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Old 01-12-2016, 09:39 AM   #29
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Name: Gordon
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... I would be surprised if an electric space heater could do much to warm up a camper except at the start and end of winter when temps climb up around 40* F. I know my little cube heater won't do a whole lot, does as they say take a little chill off.
Perhaps the following information regarding the use of a 1500 watt electric portable Ceramic heater (with fan) in a Scamp 16 (layout 4) will be of interest if it is not too far off topic for this thread:

Heater was started at 8:15 am in my unheated trailer and then left on for two hours. If it can bring the temperature up from 24 degrees than I am confident it could hold a comfortable (or at least livable) temperature in similar conditions.

Time-----Inside temp-----Outside temp
0815-----------24-------------24
0915-----------45-------------27
1015-----------56-------------31—Heater turned off
1045-----------53-------------36
1115-----------50-------------38

All readings are in Fahrenheit degrees. Trailer was in shade the entire time. The large roof vent, as well as some of the windows, were covered with Reflectix and all were closed. The heater was placed on the raised floor under the rear table. The transmitting temperature sensor was on the sofa behind the bathroom wall where it was not in the airflow. The trailer was warmer in the rear, closer to the heater. At the end of the two hours the rear was almost 60 and quite comfortable. Electric cost for the two hours was less than thirty cents. There was light, sporadic wind.
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Old 01-12-2016, 10:38 AM   #30
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SO cord is 600 VAC rated , hard service cord with the outer jacket being oil resistant. SOW cord has the same specs except it is rated for wet locations. Both make great extension cords but not necessarily in extremely cold temperatures. I worked in an oil refinery . a Taconic plant and constructiin in northern Minnesota and when you get to 40 or 50 below zero every thing has a tendancy
to crack , snap or break especially plastic / rubber .
If you go to Art 400 of the NEC you will find a list of what the various letter designations for flexible cords mean.
If you want cord that is flexible at low temperatures, try Carol (General Cable) Super Vu-Tron jackets. Available as S, SO, SOOW & SJOOW (The "J" in a description stands for 300v junior hard service insulation - a lighter jacket). Their catalog has lots of good information about cable.

Another good brand for winter flexibility is Coleman Seoprene 105C SEOOW. Good to -50°C.

Be careful of the descriptions of cable. Thermoplastic (the least expensive jacket material) will be stiff at low temperatures. Rubber is more flexible, and Thermoset insulation is the most flexible (and, generally, most expensive).
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Old 01-12-2016, 11:21 AM   #31
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It’s getting cold enough that I’d worry about getting frozen electricity. I know super conductors only “super conduct” at about -100C, colder being better. Your extension might go all “zero resistance” on you. (I think Buffalo, NY has this problem some winters.) Best to stay home in bed with a book, or with somebody who’s read one.
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Old 01-12-2016, 12:07 PM   #32
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Resistance is directly proportional to temperature. So as the temperature goes down, resistance does too. At 26 below a 16 gauge extension cord would have about the same resistance (same wire loss) as a 14 gauge cord at room temperature. Bonus?

Keep warm Steve , Raz
We're having a warm spell Raz . This morning it was only 10 below zero and the winds died down so the 35 below wind chill factor has improved. When we woke up this morning the cabin was down to 52 deg F . I should have put more wood in the stove last night before bed . Today we are making sausage and our outdoor refrigerator is working well.
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Old 01-12-2016, 12:21 PM   #33
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Steve, Been there done that. Lived 1 year at the Stanley R Mickelson anti missile complex in Langdon, ND. 35 below one day and 30 above the next. Snow blew by horizontal mixed with local farm land and was called Snurt.

Throw a log on the fire and stay warm.
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Old 01-12-2016, 01:54 PM   #34
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Steve, Been there done that. Lived 1 year at the Stanley R Mickelson anti missile complex in Langdon, ND. 35 below one day and 30 above the next. Snow blew by horizontal mixed with local farm land and was called Snurt.

Throw a log on the fire and stay warm.
Made 20 lbs of Italian Sausage , brought in 4 armloads of fire wood
,shoveled the driveway and just stoked the wood stove. Langdon is where we go in the Winter to warm up.
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Old 01-13-2016, 04:41 AM   #35
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It's a balmy 15 degrees here this morning and my seed order arrives today. Time to plant the onions. Keep warm. Raz
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Old 07-31-2016, 10:22 PM   #36
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Interesting to read all the comments about extension cords under the snow. Living in Yukon where it can often get a bit chilly at -41 (F and C cross at that point) we use extension cords under the snow for Christmas lights, vehicle plug-ins, etc with no problem at all. Never have problems with it. And still laughing at comment about the Dakotas, Minn., etc. as being the great white north. We're above the 60th parallel and consider those places part of the Banana Belt....
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Old 08-01-2016, 07:02 AM   #37
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Yes, clean snow and clean water (distilled) do not conduct electricity. (-40C = -40F)
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Old 08-01-2016, 07:28 AM   #38
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If the wire/cord is going to be left there permanently, I wouldnt use anything "covered" underground unless it's RATED for underground use. I did this for a carport where I have my Scamp stored. I have a plug on my deck that plugs into a GFI circuit. This works well and I dont worry about deterioration of my cord. Just my $.02 worth.
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Old 08-01-2016, 07:41 AM   #39
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Interesting to read all the comments about extension cords under the snow. Living in Yukon where it can often get a bit chilly at -41 (F and C cross at that point) we use extension cords under the snow for Christmas lights, vehicle plug-ins, etc with no problem at all. Never have problems with it. And still laughing at comment about the Dakotas, Minn., etc. as being the great white north. We're above the 60th parallel and consider those places part of the Banana Belt....
When I worked on Minnesota's Iron Range , I saw temps as low as -56 Deg F and for 40 days straight the temps never climbed above zero F . Hardly the Banana Belt. . It is often warmer in Alaska / Yukon than it is in Minnesota or North Dakota. . Last week on Thursday it was 57 Deg F at 2:00 PM .
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