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Old 02-08-2012, 11:34 AM   #1
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Spaceheater and extension cord.

I plan to run space heater from shore power with 25ft. -12gauge extension cord.Is that a problem?
If proper gauge and not very long,how is that different than the wiring in a house,except that it is exposed?
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Old 02-08-2012, 01:03 PM   #2
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I would go with 10 ga imo ! But again that is just my opinion
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Old 02-08-2012, 01:48 PM   #3
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12 gauge wire is good to 20 amps Max load. Your heater most likely is 1500 Watts requiring a 15 amp circuit. You'll be fine with 12 Gauge wire.

More importantly - What are you plugging the 12 Gauge Cord into and what size wire is feeding that as well as the distance from the Electrical Panel to that receptacle?
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Old 02-08-2012, 03:59 PM   #4
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Originally Posted by cfsoistman View Post
12 gauge wire is good to 20 amps Max load. Your heater most likely is 1500 Watts requiring a 15 amp circuit. You'll be fine with 12 Gauge wire.

More importantly - What are you plugging the 12 Gauge Cord into and what size wire is feeding that as well as the distance from the Electrical Panel to that receptacle?
That's why I'm saying 10 gauge because of all the unknowns.
receptacle may have 14 ga wire running 30 feet to electrical box not only that but it could be spliced and junctioned 3 times before it gets there.
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Old 02-08-2012, 04:07 PM   #5
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I guess I will never know about the wiring to the plug.This is at a State Park.
I did not think that a bigger extension cord would help if there just isn't enough juice to the plug?
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Old 02-08-2012, 04:21 PM   #6
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Rv park shore power at the normal plug should be atleast 15 amp and then 12 gauge cord will be fine.
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Old 02-08-2012, 04:37 PM   #7
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X2 on using the 10 gauge wire!
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Old 02-08-2012, 05:27 PM   #8
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Quote:
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That's why I'm saying 10 gauge because of all the unknowns.
receptacle may have 14 ga wire running 30 feet to electrical box not only that but it could be spliced and junctioned 3 times before it gets there.
No No No. You can't run a 10 guage wire off a 14 guage wire. 10 guage can handle more amperage than 14. you can can over load the 14 guage. 10 guage can handle 30 amps where 14 guage 15 amp.
Most parks are running larger guage so they can handle 50 amp survice.
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Old 02-08-2012, 07:32 PM   #9
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I solved this problem by installing a dedicated circuit, with a 20 amp receptacle inside and a 12 ga. extension cord plugged in to the CG pedestal. I use this circuit primarily to power my 1500 watt heater and/or my auxiliary A/C unit. For all practical purposes I have upgraded my service from 30 amp to 50 amp.
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Old 02-09-2012, 12:57 AM   #10
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Quote:
Originally Posted by jim44646 View Post
No No No. You can't run a 10 guage wire off a 14 guage wire. 10 guage can handle more amperage than 14. you can can over load the 14 guage. 10 guage can handle 30 amps where 14 guage 15 amp.
Most parks are running larger guage so they can handle 50 amp survice.
uhhh, the larger gauge extension isn't going to magically draw a bunch of current. The heater is going to draw what it wants, the larger extension cord will have less of a voltage drop, and the heater will probably pull LESS amps from the park outlet...

ETA, if it was a 50A service drop, the whole plug would be different, too.
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