Dogbone heat? 50A/30A
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Aug-07-2017 08:02 AM
I moved my rig into position to get ready for our eclipse vacation. I have a 30A receptacle that I can use in this parking spot (RV is 50A). It's fairly new and only 6' 12ga from the main breaker box.
Anyway, my dogbone had a lot of corrosion on it so I cleaned it up with a wire wheel on a dremel. No copper left - just steel.
I tried it with 2 air conditioners and it got quite warm (not hot). Then with one ac and it was a little bit warm. Now with just the fridge on, it's not warm at all.
My question is this: assuming I'm drawing 20-25A for the 2 ac, should the dogbone get warm at all? What's 'normal'?
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Aug-07-2017 06:10 PM
joebedford wrote:Yes running continuous at 80 percent of rating (24 amps) will get the component warm.
My question is this: assuming I'm drawing 20-25A for the 2 ac, should the dogbone get warm at all? What's 'normal'?
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Aug-07-2017 04:18 PM
Bill.Satellite wrote:Like I said, my mistake - it's not 12ga, it's 6 feet of 10 gauge wire.
A "real" electrician would never wire up a 30 amp plug with 12ga wire. You could likely get away with 10 is the run from the breaker box to the outlet is not too far. If it's a long run you would need 2 8's plus a 10 for the ground.
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Aug-07-2017 02:18 PM
joebedford wrote:
The owner won't change the receptacle. He's a real cheap b*******.
Actually, the receptacle was installed by a real electrician about 8 years ago and has about 1 month total running time on it - maybe plugged / unplugged 20 times total. I put another receptacle on the other side of my garage for visitors about 4 years ago - maybe I'll try that one too.
Anyway, I bought a new Camco 50A/30A dogbone today. With both acs and fridge I can imagine that it's maybe slightly tiny warmish. Certainly not 'quite warm' like yesterday. Less warm than only one ac running yesterday.
I'll report again when I've tried the other receptacle. The run from the breaker box to that one is about 25 feet, not 6 like the one I'm using now.
A "real" electrician would never wire up a 30 amp plug with 12ga wire. You could likely get away with 10 is the run from the breaker box to the outlet is not too far. If it's a long run you would need 2 8's plus a 10 for the ground.
Can't we all just get along?
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Aug-07-2017 01:45 PM
15A receptacle near house breaker panel with no load - 123V
15A receptacle near RV breaker panel with both acs and fridge running - 117V
50/30 dogbone in other 30A receptacle same no heating.
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Aug-07-2017 01:41 PM
FWIW, the cables are not enclosed - they run through and along the studs in my garage.
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Aug-07-2017 01:28 PM
I moved my rig into position to get ready for our eclipse vacation. I have a 30A receptacle that I can use in this parking spot (RV is 50A). It's fairly new and only 6' 12ga from the main breaker box.
12ga is too small for 30amp circuit, too small for 25 amps
12ga is rated at 20amps to not get hot
in open air wiring, it might carry 40-50, but it would get dangerously hot
the minimum ga for 30amps is 10ga, for a 30amp dryer plug
and 8ga or larger is better for having an RV plugged in running a/c units
the heat is coming from the plug because of the 12ga wire is getting hot
this is a fire looking to happen
or did you mean to say 12ft of 6ga wire
But I Can Not understand it for you !
....
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Aug-07-2017 12:28 PM
Actually, the receptacle was installed by a real electrician about 8 years ago and has about 1 month total running time on it - maybe plugged / unplugged 20 times total. I put another receptacle on the other side of my garage for visitors about 4 years ago - maybe I'll try that one too.
Anyway, I bought a new Camco 50A/30A dogbone today. With both acs and fridge I can imagine that it's maybe slightly tiny warmish. Certainly not 'quite warm' like yesterday. Less warm than only one ac running yesterday.
I'll report again when I've tried the other receptacle. The run from the breaker box to that one is about 25 feet, not 6 like the one I'm using now.
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Aug-07-2017 12:01 PM
New dogbone...should NOT be any heat
Still heating up...receptacle corroded/loose ----replace it
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Aug-07-2017 10:37 AM
Also by excessive current.
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Aug-07-2017 09:07 AM
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Aug-07-2017 09:01 AM
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Aug-07-2017 08:23 AM
30 amp receptacles and plugs will get warm when used to near rating, but should not get hot.