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Old 08-29-2018, 10:41 AM   #15
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Originally Posted by Arch Hoagland View Post

That's correct. I installed a RV park type outlet by my house that has a 50 amp, 30 amp and 15 amp outlets. I've had my coach plugged into the 50 amp, a friend's class C plugged into the 30 amp and a 110 volt lamp plugged into the 15 amp outlet. All worked fine at the same time.
With all due respect this doesn't prove anything other than the fact that none of the connections were overloading their respective circuit breakers. No doubt your "home pedestal" is supplied by something like an AWG 6 cable. There's no protection that the sum of the individual outlets doesn't exceed the rating of the cable supplying the pedestal.
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Old 08-29-2018, 11:17 AM   #16
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With all due respect this doesn't prove anything other than the fact that none of the connections were overloading their respective circuit breakers. No doubt your "home pedestal" is supplied by something like an AWG 6 cable. There's no protection that the sum of the individual outlets doesn't exceed the rating of the cable supplying the pedestal.
The cable supplying the pedestal would have a breaker in the main panel, rated for the max current of the cable. With that, you could not exceed the rating if the cable.

If the pedestal is wired correctly the most current you could draw on one leg would be 80 amps, the sum of the 30 amp outlet and 1 leg of the 50 amp outlet.
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Old 08-29-2018, 11:36 AM   #17
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If the pedestal is wired correctly the most current you could draw on one leg would be 80 amps, the sum of the 30 amp outlet and 1 leg of the 50 amp outlet.
So the question boils down to what size wire was used to supply the pedestal and what size main breaker is in the box. From what I have read it appears that 6 AWG is rated at 55A if NM, TW or UF cable was used. Using 4 AWG could raise this to 70A.

The fact that all three outlets were in use at the same time without tripping a breaker only demonstrates that at that moment the total current didn't exceed the main breaker rating. Depending on what wire gauge was used for the pedestal, one could envision scenarios in which the main breaker might be tripped. I wouldn't put it past someone to have wired the pedestal with 6 AWG since that would have been sufficient for the largest outlet.

No offense to licensed electricians, but I've seen enough examples of shoddy wiring by people claiming to know what they are doing that I would suggest that arch hoagland verify the main breaker rating and the gauge of the wire going to the pedestal. Furthermore, I would recommend that he consider the length of the run if the pedestal is any significant distance from the breaker panel so the proper derating factor can be applied.
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Old 08-29-2018, 05:57 PM   #18
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https://www.homedepot.com/p/GE-100-A...32SS/203393689


It's prewired, all I did was hook up the 4 input wires, Ground, neutral, L1 and L2. Don't know the wire size because an electrician hired by my insurance company (CSAA) made the run from our house input panel.
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Old 08-29-2018, 07:04 PM   #19
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https://www.homedepot.com/p/GE-100-A...32SS/203393689


It's prewired, all I did was hook up the 4 input wires, Ground, neutral, L1 and L2. Don't know the wire size because an electrician hired by my insurance company (CSAA) made the run from our house input panel.
'

Even if you don't know the wire size, you can look at the breaker than protects the circuit. The electrician probably sized that to match the wire he used.
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Old 08-29-2018, 07:15 PM   #20
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No, you wire it for 80 or 100 amp feed from the main panel.
Asking how its actually wired, not how it should be. I didn't ask the question well. The assertion appeared that all three outlets (50a, 30a, 20a) could be used simoultaniously - and at full capacity. I am questioning if that capacity actually exists. I would think more likely its sized to support either the 50a or 30a, plus maybe the 20a.
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Old 08-29-2018, 07:19 PM   #21
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Personally I would feed and breaker the panel for 50 Amps at the distribution box.
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Old 08-29-2018, 07:51 PM   #22
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Those theories sounds very plausible. I had recently put a small amount of dialectic grease on my plug because I was having difficulty with the dog bone that I had purchased from Walmart. It was way too tight and needed to be pryed apart. I literally had to put a lot of effort using prying tools to get my 50 amp plug and the 50 to 30 dog bone apart. Perhaps I damaged the plug in the process? Aside from taking the plug apart, is there a way to test?
My thoughts. Are you using dialectic grease or anti-oxide grease? Big difference. One is an insulator and the other a protective conductor.
The dog bone was doing its job. They are tight and do need a good bit of tugging to separate if the contacts are grabbing correctly. This is true for the 50A outlet. 30's tend to be easier to plug and unplug into.
About you actual problem. I think there is a wiring issue with the pedestal and you need to move to a new sight if the park can not address the situation right away.
In a properly wired shore power, the 50A outlet/breaker are L1&L2 of a 70A feeder from a main service panel. the 30A outlet/breaker is on L1 and the 20A GFCI/breaker is on L2. This happens by the design of the RV multi outlet box. I am using the Mallard box as an example. The 50A service is available as a stand alone with the GFCI or the 30A service is available with the GFCI. All three are not usually available at the same time because this would require a 100A sub service feed to the box. I am not certain but, I think the breaker bus is only rated for 70A max.
I hope I have not caused any confusion with my explanation. If I have I am certain will hear about it.
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Old 08-30-2018, 06:26 AM   #23
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I will double check the grease I used. I am fairly certain it was dielectric. As far the tightness of the plug- this was way overkill, as in, without a literal pry bar, it was not coming apart.

We only stayed at that campground one night, and I expect we will not return. So it will be difficult to test the theory. My theory is that the 120 outlet split off one leg of the 240. Of course I am way out of my depth here, and I do appreciate you folks they have much more knowledge than myself.

I will keep an eye on this situation, and if it is repeated elsewhere, I won’t know that there is something wrong with my equipment.

Thanks to all.
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Old 08-30-2018, 07:41 AM   #24
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Check breaker at generator. Bet its tripped.
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Old 08-31-2018, 10:24 AM   #25
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Originally Posted by Doug-Terrie View Post
I will double check the grease I used. I am fairly certain it was dielectric. As far the tightness of the plug- this was way overkill, as in, without a literal pry bar, it was not coming apart.

We only stayed at that campground one night, and I expect we will not return. So it will be difficult to test the theory. My theory is that the 120 outlet split off one leg of the 240. Of course I am way out of my depth here, and I do appreciate you folks they have much more knowledge than myself.

I will keep an eye on this situation, and if it is repeated elsewhere, I won’t know that there is something wrong with my equipment.

Thanks to all.
I am glad that you are off that pedestal. Are you going home now or to another campground?
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