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Old 01-16-2021, 08:48 PM   #21
Steveo57
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Cavie is right. The neutrals are combined in that plug and the GFCI outlet needs to see the same current going out of the 20 amp outlet as what comes back on the neutral to the 20 amp outlet. Since the neutrals are combined the current will not be the same and the GFCI outlet will trip.
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Old 01-17-2021, 06:01 AM   #22
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Well all is good IF the pedestal trully has a combined protection of 45 to 50 amps. In any older parks the pedestal may be on a shard circuit, I have seen four 30/15 amp pedestals on a shared 70 amp breaker, so using the 30/15 cord may be the straw that broke the camel's back.
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Old 01-17-2021, 06:10 AM   #23
flybouy
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Quote:
Originally Posted by cavie View Post
This is different than 2 in series. That dogbone WILL NOT work on a GFI Circuit. Take it from a master electrician. GFI can not share a neutral with the opposite phase. Hot and neutral have to match. The neutral goes thru the GFI breaker, unlike a normal non-GFI circuit. The average person has no idea how a GFI works.
You are assuming that the two sources feeding the adapter are different phases. If they are then yes the GFCI will trip. I've been in more than one cg where I've brought to management's attention the improperly wired or worn out 30 Amp NEMA TT-30R, 2P, 3W outlet. Typically cg "maintenance" will show up to replace it. I've had to explain to some of them why it was incorrectly wired as well as why the outlet was defective even though the contacts still carry electricity.

For someone using one of these at home you have a 50/50 chance that the outlet that the 15 Amp side and the 30 Amp outlet are the same phase.
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Old 01-17-2021, 08:45 AM   #24
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Originally Posted by flybouy View Post
You are assuming that the two sources feeding the adapter are different phases. If they are then yes the GFCI will trip. I've been in more than one cg where I've brought to management's attention the improperly wired or worn out 30 Amp NEMA TT-30R, 2P, 3W outlet. Typically cg "maintenance" will show up to replace it. I've had to explain to some of them why it was incorrectly wired as well as why the outlet was defective even though the contacts still carry electricity.

For someone using one of these at home you have a 50/50 chance that the outlet that the 15 Amp side and the 30 Amp outlet are the same phase.
GFI circuits can not share neutrals no matter how many phases are used!
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Old 01-21-2021, 04:58 PM   #25
Beemer Phil
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Why risk damaging equipment. There's got to be a better solution. By the way, I agree with Cavie.
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Old 01-22-2021, 02:04 PM   #26
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The 20 amp outlet on a ped is GFI'ed. With that splitter, it will not work because of that! End of story.
I love this guy!! Actually talks like Walter... LOL
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