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joebedford's avatar
joebedford
Nomad II
Aug 07, 2017

Dogbone heat? 50A/30A

Before you say anything, I'm going to buy a new dogbone today.

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'?
  • Good answer from BB. Check the voltage in the rig with the A/Cs running as that might be a factor especially with 12ga wire. Is the wire itself 6' long?
  • Likely as not the receptacle is badly worn and there is resistance between the receptacle and your plug. You have done about all you can short of having the receptacle replaced. Maybe the park will be accommodating.

    30 amp receptacles and plugs will get warm when used to near rating, but should not get hot.