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Old 05-23-2022, 06:37 AM   #1
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Shore Power electrical connection question

Good morning,

So i recently bought a 2020 Rockwood 2608BS. So far we have enjoyed it very much. It has a 50 amp twist lock connection to the RV. I also bought a 50 amp Surge Protector for it.

My problem is that many of the state parks have only 30amp connections. Is there a problem with a 30 to 50 amp adapter when using the 50 amp surge protector?

This trailer also only has one A/C unit, so I was thinking of buying a 30 amp cord but didn't know if I had to re wire the connection on the trailer
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Old 05-23-2022, 06:57 AM   #2
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I would not change the cord. The 30A cord and plugs are 3 wire and the 50A cord and plug are 4 wire. I would use the adaptor. Also if you change cords you would not be able to use your 50A surge protector if it is the inline type.

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Old 05-23-2022, 07:07 AM   #3
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Your surge protector is a separate unit or dongle that connects to the power pole? Just plug your 30 to 50 amp adapter/connector to the pole and the surge protector to that. Or don't bother with a surge protector -- I don't although rumor has it there's one buried in a cabinet somewhere.

Surge protectors trigger on voltage not amperage so it shouldn't make any difference when lightening strikes the power pole.

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Old 05-23-2022, 07:40 AM   #4
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Quote:
Originally Posted by terrydunn View Post
Good morning,

So i recently bought a 2020 Rockwood 2608BS. So far we have enjoyed it very much. It has a 50 amp twist lock connection to the RV. I also bought a 50 amp Surge Protector for it.

My problem is that many of the state parks have only 30amp connections. Is there a problem with a 30 to 50 amp adapter when using the 50 amp surge protector?

This trailer also only has one A/C unit, so I was thinking of buying a 30 amp cord but didn't know if I had to re wire the connection on the trailer

There is no problem with using an adapter, but keep in mind you are going to be limited to only using 30 amps total worth of electrical stuff, instead of 100 amps (a 50 amp RV has TWO 50 amp legs each capable of 50 amps so 100 amps in total). You are going from 12000 watts of capability down to 3600 watts capability when using the adapter. You will need to watch what you turn on and must turn off in order to not trip the pedestal circuit breaker when on 30 amps.



This link may help


https://www.rvtechmag.com/electrical/chapter3.php
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Old 05-23-2022, 08:53 AM   #5
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Originally Posted by wmtire View Post
There is no problem with using an adapter, but keep in mind you are going to be limited to only using 30 amps total worth of electrical stuff, instead of 100 amps (a 50 amp RV has TWO 50 amp legs each capable of 50 amps so 100 amps in total). You are going from 12000 watts of capability down to 3600 watts capability when using the adapter. You will need to watch what you turn on and must turn off in order to not trip the pedestal circuit breaker when on 30 amps.



This link may help


https://www.rvtechmag.com/electrical/chapter3.php
Interesting and helpful.

My daughter did run the A/C this last weekend and the electric water heater was on and she had no problems. So I can see how this all works now, thanks
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Old 05-23-2022, 10:00 AM   #6
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Just takes some rudimentary power management. 30 amps has been more than enough for our use in the Roo and earlier in the Bayside popup. AC is the prime user in hot weather. A space heater to supplement the furnace in cold weather. Refrigerator and water heater run primarily on propane in the summer to save the amps for the AC but even that doesn't use more than 20 amps.

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Old 05-23-2022, 10:21 AM   #7
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Originally Posted by terrydunn View Post
This trailer also only has one A/C unit, so I was thinking of buying a 30 amp cord but didn't know if I had to re wire the connection on the trailer
You would be much better off to rewire the end of a 50 amp cord with a 30 amp plug so that way you would only be taking resale value away from a $200 50 amp power cord rather than from a $xx,000 RV.
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Old 05-23-2022, 11:07 AM   #8
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Not sure what surge protector you have, but some have a display that shows the Pedestal voltage, Current draw, and error codes if any.
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Old 05-23-2022, 12:00 PM   #9
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A 50 amp to 30 amp adapter combines the two legs of the 50 amp power to the single leg of the 30 amp power. So if your EMS is happy with the adapter connected ahead of it you should have no problems. I would continue as you have in the past with the adapter and you will be fine I would not change anything. As others have said you will be limited to 30 amps in any case when using the adapter, so just watch your usage.
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Old 05-23-2022, 12:20 PM   #10
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You would be much better off to rewire the end of a 50 amp cord with a 30 amp plug so that way you would only be taking resale value away from a $200 50 amp power cord rather than from a $xx,000 RV.
Better yet just use an adapter that is a 50A female to 30a male. Then you haven't modified anything.
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Old 05-23-2022, 12:30 PM   #11
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Better yet just use an adapter that is a 50A female to 30a male. Then you haven't modified anything.
I agree that's the best thing to do. terrydunn mentioned buying a 30 amp cord and rewiring the RV to accept the cord. That is the absolute last thing I would do.

First choice - the simple 30 amp to 50 amp dogbone.
Second choice - 30 amp plug on the end of a 50 amp cord.
Not even consider choice - rewire RV for 30 amp.
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Old 05-25-2022, 01:11 AM   #12
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Originally Posted by NavyLCDR View Post
I agree that's the best thing to do. terrydunn mentioned buying a 30 amp cord and rewiring the RV to accept the cord. That is the absolute last thing I would do.

First choice - the simple 30 amp to 50 amp dogbone.
Second choice - 30 amp plug on the end of a 50 amp cord.
Not even consider choice - rewire RV for 30 amp.
I wouldn't even consider modifying the plug. Just stick with the adapter 4 prong 50 amp female to three prong 30 amp and plug your surge protector in to the adapter
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