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Old 03-13-2018, 08:02 AM   #1
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50A and 30A

a 30 amp rv will have a single 30 amp linen at 120 volts, a maximum of 3600 watts of power.

A 50 amp RV has TWO 50 amp lines at 120 volts or a total of 100 amps of power at 120 volts a maximum of 12,000 watts. Typically 240 voltage is not used with the RV (some exceptions...dryers etc) But you do have 3 1/3 times more power on a 50 amp service than you do on a 30 amp service.
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Old 03-13-2018, 09:10 AM   #2
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Good to know.

We also have an 8000 watt generator which can produce 66.7 amps.
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Old 03-13-2018, 09:42 AM   #3
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All we know about it if we need two AC's running wont work on 30 amp service! Thanks for the info.
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Old 03-13-2018, 11:43 AM   #4
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Robbbyr posted links to some very good reading on the subject.
Some references:
The 50-amp 120/240-volt 3 pole 4
https://www.rvtechmag.com/electrical/chapter3.php
AC Electricity

You are correct that a 30 amp RV plug is going to give you 3600 watts of power. 30x120=3600

A 50 amp RV plug is going to give you 12000 watts of power.

L1 50 amp x 120 vac =6000 watts
L2 50 amp x 120 vac =6000 watts

Technically it is not 100 amp it is 50 amp twice.

Lets say I have my 50 amp trailer plugged into a 50 amp RV service.
My EMS reads
L1 120v 50amp
L2 120v 50amp
I'm using 6000 watts of power on L1 and 6000 watts of power on L2 for a total of 12000 watts.

If I take a clamp on amp meter and check the Black wire on L1 I will have 50amp. Put the meter on the Red L2 I will have 50amp.
Put the meter on the White Neutral I will have 0.

It is Alternating Current

I hope this helps.
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Old 03-13-2018, 04:27 PM   #5
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Originally Posted by 2naEagle View Post
Robbbyr posted links to some very good reading on the subject. Some references:
The 50-amp 120/240-volt 3 pole 4
https://www.rvtechmag.com/electrical/chapter3.php
AC Electricity

You are correct that a 30 amp RV plug is going to give you 3600 watts of power. 30x120=3600

A 50 amp RV plug is going to give you 12000 watts of power.

L1 50 amp x 120 vac =6000 watts
L2 50 amp x 120 vac =6000 watts

Technically it is not 100 amp it is 50 amp twice.

Lets say I have my 50 amp trailer plugged into a 50 amp RV service.
My EMS reads
L1 120v 50amp
L2 120v 50amp
I'm using 6000 watts of power on L1 and 6000 watts of power on L2 for a total of 12000 watts.

If I take a clamp on amp meter and check the Black wire on L1 I will have 50amp. Put the meter on the Red L2 I will have 50amp.
Put the meter on the White Neutral I will have 0.

It is Alternating Current

I hope this helps.

technically it IS 100 amps... AT 120 volts...your confusing 240 and 120. It is two 120 50 amp lines coming into your RV. The VAST amount of energy used in an RV is 120 volts (or 12 volts) NOT 240 volt system. You have 100 amps @ 120 volts or 12,000 watts of potential energy.. yes you phase the two "hot" lines to you can use a single neutral. It works because we have alternating current, it cycles at 60..
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Old 03-13-2018, 04:49 PM   #6
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This is looking like yesterdays dispute, same argument different people. Norty please shut this one down too.
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Old 03-13-2018, 04:57 PM   #7
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Originally Posted by Sundancer330 View Post
This is looking like yesterdays dispute, same argument different people. Norty please shut this one down too.
Man we're good. I just like people with these 50 amp RVs to try and balance the load as best they can.
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Old 03-13-2018, 05:04 PM   #8
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Man we're good. I just like people with these 50 amp RVs to try and balance the load as best they can.
LOL, So many that worry about everything, just use it. Im getting out of here before silverado arrives and explodes once again on this subject.
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Old 03-13-2018, 05:17 PM   #9
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The good thing about electric...it's logical and not open to interpretation.. It is what it is.. 2 50 amp 120 volt lines allows you to use 12,000 watts at 120 volts. Many people get confused with 240 service and 120 service. The vast majority of RV do not use 240 volts ... they use 120 volts...hence you have 100 amps of available power at 120 volts.

And a 30 amp service is 30 amps at 120 volts a single hot line...hence 3600 watts of available power at 120 volts.

On either you get a voltage drop and you will get a drop in available wattage...wattage is the power that is used by electrical products...lights MW, AC etc.

There really is no debate, electric is what it is never anything different.
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Old 03-13-2018, 05:24 PM   #10
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Originally Posted by wags999 View Post
The good thing about electric...it's logical and not open to interpretation.. It is what it is.. 2 50 amp 120 volt lines allows you to use 12,000 watts at 120 volts. Many people get confused with 240 service and 120 service. The vast majority of RV do not use 240 volts ... they use 120 volts...hence you have 100 amps of available power at 120 volts.

And a 30 amp service is 30 amps at 120 volts a single hot line...hence 3600 watts of available power at 120 volts.

On either you get a voltage drop and you will get a drop in available wattage...wattage is the power that is used by electrical products...lights MW, AC etc.

There really is no debate, electric is what it is never anything different.
I guess you were not here last night, this same debate got a bit heated and Norty shut it down before it got out of hand. Talk about electrical loads needs to be a nono subject just like politics on here.
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