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Old 06-16-2013, 01:45 PM   #1
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Cheater box or cable needed

Has anyone seen and/or used a cheater box for two(2) 20 AMP outlets into one(1) 30 AMP outlet? Similar to the two 30 to one 50 that I have, but for the "smaller" outlets? We have again found ourselves at a lodge .... Moose, this time, Elks last time, with 4 20 AMP outlets but nothing higher.
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Old 06-16-2013, 02:00 PM   #2
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Here's some previous threads.

http://www.google.com/search?q=20+am...earch=irv2.com
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Old 06-16-2013, 03:38 PM   #3
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The bottom line is that what you describe likely will not work.

NOW: if the lodge has 30 amp breakers (As my Moose lodge does) then the POWER MAXIMIZER designed for generators may work, it takes both halves of a duplex outlet.

But for a "cheater" to work off two different 15/20 amp outlets several conditions must exist.

1: The two outlets must both be on the same leg, but different breakers.

2: The breakers need to be inditical (not practical)

3: The current paths need to be electrically identical (Not possible).

If, let's say, one outlet is 10 feet from the breaker box and the other is 20, then the closer outlet will carry more current, it's breaker till trip and the other one will then trip a fraction of a second later.

The power maximizer works because the two current paths ARE identical being as it's the same outlet.
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Old 06-16-2013, 04:08 PM   #4
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Quote:
Originally Posted by danbjr View Post
Has anyone seen and/or used a cheater box for two(2) 20 AMP outlets into one(1) 30 AMP outlet? Similar to the two 30 to one 50 that I have, but for the "smaller" outlets? We have again found ourselves at a lodge .... Moose, this time, Elks last time, with 4 20 AMP outlets but nothing higher.
What do you hope to gain by trying to run 2 20A lines into your 30A cord? The 30A cord only uses one hot line so you will still be limited to 20A of power coming in.

If you're feeding a 50A system then you can conceivably use the "cheaters" to supply 30A to one hot leg and 20A to the other, but these typically don't work if you plug in to a GFCI-protected outlet.
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Old 06-18-2013, 04:30 PM   #5
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Quote:
What do you hope to gain by trying to run 2 20A lines into your 30A cord? The 30A cord only uses one hot line so you will still be limited to 20A of power coming in.
That's not quite accurate, Alan. Two 20A hots could be fed to the single 30A hot if the right conditions are met, i.e. that both are of the same "phase". And for practical purposes, they need to be independent 20A sources, not just two outlets on the same circuit. That would put the two 20A sources in parallel and probably allow 30 amps to be pulled.

WA8yxm cited some other practical considerations that could result in less than 30A being available too. All in all, this is not an practical approach unless you have in-depth knowledge of the 20A source circuits.

I have actually done this, but it was at my brother-in-law's house where he & I chose two suitable circuits and used them to power my 50A coach for several days. I used my 50/30 cheater box with two 30/20 adapters to connect to the 20A outlets.
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Old 06-18-2013, 04:56 PM   #6
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Use a 20 to 30 adaptor and just watch your usage.
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