50 Amp Service - Luxury Coach Lifestyles
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Old 12-06-2012, 09:05 PM   #1
JustDustin
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Default 50 Amp Service

Hi all,

Can you tell me, are all 50 amp service, 220 volts (for motor homes) ?

Thanks !!!!! Thx
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Old 12-06-2012, 09:29 PM   #2
MrE
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If you are referring to hook-ups at RV parks, all 50 amp services are 220 volts. All 30 amp services are 110 volts.
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Old 12-06-2012, 09:45 PM   #3
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RV 50A service is 2 legs of 120VAC, usually wired so there is 240VAC across the 2 hot legs. It's not 240VAC service, as both legs are referenced to a neutral. It's possible to wire an RV 50A outlet so the 2 hot legs are in phase and measure 0 between them, but this won't matter unless the RV has any 240VAC appliances.
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Old 12-06-2012, 11:43 PM   #4
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Standard 50A service is indeed 220v and identical to standard residential wiring for 220v. That said, you will find the occasional RV park whose 50A service is not 220v but instead two x 120v with anywhere from 30 to 50A on each leg.
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Old 12-07-2012, 02:53 PM   #5
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The proper title is 120/240 I believe. Look at the following

120-zero-120 The voltages relative to neutral
L1-=-240=-=L2 The voltage across the two outside leads

And don't forget the Green/bare (safety ground) wire It is the pin that is shaped.. Differently.
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Old 12-07-2012, 03:02 PM   #6
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Quote:
Originally Posted by Viva Las Vegas JDR View Post
RV 50A service is 2 legs of 120VAC, usually wired so there is 240VAC across the 2 hot legs. It's not 240VAC service, as both legs are referenced to a neutral. It's possible to wire an RV 50A outlet so the 2 hot legs are in phase and measure 0 between them, but this won't matter unless the RV has any 240VAC appliances.
Is that true? If the two legs are on the same120v phase and the system had a full load, wouldn't the neutral wire have to carry 100 amps? I don't think the wire is rated for that much current.
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