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Old 09-11-2012, 10:01 PM   #1
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The two legs of the 50 amp system?

As the question will demonstrate, I have little knowledge about the electrical system of a MH....or much of anything else. The question...is there a common in how the two legs are separated in a MH? Like one leg carries say front AC and microwave and second leg rear AC, etc? I know I borrowed a fellows homemade adapter box one time where I could get one leg on 30 amp and another leg on 120/15amp plug (all on same pedestal however) and I occasionally one throw a breaker but not neccessarily the same breaker. I assume which ever leg I overloaded (running both ACs) that is the breaker I would throw. As I remember the 120 was the easiest thrown and I was pretty sure it must have been carrying the rear AC. Since they were both on same pedestal I doubt I was getting 45 amps total anyway and I did not have meter to check at time.

On the subject of adapters....if one has no 50 amp plug at their designated pedestal but does have the ability to use his pedestal and an ajacent pedestal, would it not be more efficient for a true 50 amps to use the 30 amp plug to adapter box for one leg and if available a 30 amp extension from adapter box to next door pedestal for another 30 amp (second leg). Then of course the 50 amp from MH plugs in to adapter box for combined amps....I think. I camp somewhere this could be a possibillity. Is this not more favorable than adapter to 30 amp for one leg and to 120/15 for second leg in same pedestal as mentioned above.

Bill (who said he knew little about such)
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Old 09-11-2012, 10:13 PM   #2
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There is no standard in the industry about how loads are distributed on the different legs. In most cases, breakers in the panel alternate legs - that is, breakers next to each other will pull from different legs. It's easy to switch off one main breaker to find which outlets/appliances are powered by that circuit. You could then color code the branch breakers with a paint dot to remind you which are which for the purpose of balancing loads.
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Old 09-11-2012, 10:39 PM   #3
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Hi Buck454
Always remember the best you can continuously draw is 80% of the breaker rating. So your first choice should always be 50 amp biphase . This will give you .8x50=40 amps for each phase continuousl (80 amp total)y and is equivalent to a 2 wire 100 amp connection.
This is what you can expect from a normal 50 amp receptacle. There is no other combination that will come close to this value.
Two 30 amp receptacles can only deliver 24 amps each continuously. Such an adapter is not available. You would have to build your own. Great care must be taken for proper polarity (hot and neutral) of your adapter and the provided 30 amp receptacles or you will experience a smoking breaker-pop-fest.
Live with what you got. Run the generator to power both AC's.
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Old 09-11-2012, 11:01 PM   #4
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Quote:
Originally Posted by garyspang View Post
Hi Buck454
Always remember the best you can continuously draw is 80% of the breaker rating. So your first choice should always be 50 amp biphase . This will give you .8x50=40 amps for each phase continuousl (80 amp total)y and is equivalent to a 2 wire 100 amp connection.
This is what you can expect from a normal 50 amp receptacle. There is no other combination that will come close to this value.
Two 30 amp receptacles can only deliver 24 amps each continuously. Such an adapter is not available. You would have to build your own. Great care must be taken for proper polarity (hot and neutral) of your adapter and the provided 30 amp receptacles or you will experience a smoking breaker-pop-fest.
Live with what you got. Run the generator to power both AC's.

This type of adapter is available. I have one from CW. However, it will not work if one leg is on a GFIC. (15 or 20 amp). Others sell them also. Unless you will have two, 30 amp circuits available, don't waste your money buying one though.
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