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Old 08-12-2015, 12:58 PM   #21
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A couple of the above posts seem to disagree, so I'm confused. My question is: If I use a 50-to-30 dogbone and then plug my 30 amp PI surge protector into the 30-amp end and then plug in my 30-amp camper, will I be getting just 25 amps?
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Old 08-12-2015, 01:40 PM   #22
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A couple of the above posts seem to disagree, so I'm confused. My question is: If I use a 50-to-30 dogbone and then plug my 30 amp PI surge protector into the 30-amp end and then plug in my 30-amp camper, will I be getting just 25 amps?
You'll have 30 amps available.



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Old 08-12-2015, 01:47 PM   #23
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Please bare in mind, 30 amp service has a 30 amp breaker and 50 amp service has two 25 amp breakers for service. Using 50 amp for 30 amp service you'll be using only one pole of the 50 amp which will be only 25 amps. If your rig sits in the sun and the A/C is running watch your draw.

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Oscar, I think you may possibly be a little confused on what a double pole circuit breaker is, and the 50 amp service. This post with links may help somewhat.

In a double pole breaker, you do in essence have TWO 50 amp breakers, each one controlling 50 amps per line.

50 Amp Service

Edit: This diagram may also help visualize it better

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Old 08-12-2015, 02:03 PM   #24
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A couple of the above posts seem to disagree, so I'm confused. My question is: If I use a 50-to-30 dogbone and then plug my 30 amp PI surge protector into the 30-amp end and then plug in my 30-amp camper, will I be getting just 25 amps?
If I am understanding your question correct, you are wanting to use the dogbone to plug your 30 amp travel trailer and surge protector into a 50 amp campground outlet? I prefer to call a 50 amp service a 50 amp x2 service for everyone to understand. You will have two legs (L1 and L2), each capable of 50 amps of 120 volts at the pedestal. They are controlled by a double pole circuit breaker which controls TWO 50 amp legs.

If this is true and that's how you are connecting, then the dogbone will only use one leg (ex L1) of the 50 amp (x2) service. You will have 50 amps available out of the campground pedestal on that one leg to the surge protector and all the way to your electrical box inside your RV, where there the RV's MAIN 30 amp breaker will control/protect the circuits.

As long as you stay within the same usage as you always do when just using 30 amp service, you are fine...and even if you did overload, then most likely the RV's main 30 amp circuit breaker is going to trip.

The only weak point you could have is the 30 amp power cord from your trailer to the 50 amp outlet, but this is going to be a miniscule problem, if any.Your RV's main 30 amp circuit breaker hopefully will trip, before damage is done to the power cord. As long as you stay within the normal parameters of your 30 amp usage, you will be fine.

I use a dogbone like you are referring to many times, as many campgrounds 30 amp outlets are loose, wore out, or faulty. I hook the dogbone up, then connect my 30 amp RV to the pedestals 50 amp x2 outlet.

Edit: I found this site that explains the various adapters and has schematics of how they are wired internally.

http://www.dmbruss.com/zFullTimeLife...alAdapters.htm
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Old 08-12-2015, 03:41 PM   #25
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Thanks, guys. Exactly what I needed to know. I am no longer confused...
at least on THIS issue.
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Old 08-12-2015, 03:42 PM   #26
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Thanks, guys. Exactly what I needed to know. I am no longer confusion...
at least on THIS issue.


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Old 08-12-2015, 04:41 PM   #27
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Thanks, guys. Exactly what I needed to know. I am no longer confused...
at least on THIS issue.
Glad you got it figured out. This is a great link below, that really explains 50 amp x2 service and load balancing with one common neutral wire (which let's you use smaller wire than you would if all 100 amps were on a single leg).

Just something you may want to peruse at your leisure.

Electrical Tutorial - Chapter 3 - 30 Amp versus 50 Amp
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Old 08-12-2015, 06:03 PM   #28
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Thanks so much.
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