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Old 07-28-2019, 01:46 PM   #1
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Progressive Industries EMS-PT50X

Just got a great deal on a Progressive Industries EMS-PT50X. My TT is only a 30 amp service. Will I have any issues? Is it safe, or should I sell it and make a few bucks and get an actual 30 amp unit? Let me know, Thanks!
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Old 07-28-2019, 01:59 PM   #2
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It will work fine. I am assuming you will be attaching a 50A to 30A adapter after the EMS.

Of course this assumes you will always have a 50A outlet to plug into, If the panel only has a 30A, you are out of luck.
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Old 07-28-2019, 02:56 PM   #3
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It will work fine. I am assuming you will be attaching a 50A to 30A adapter after the EMS.

Of course this assumes you will always have a 50A outlet to plug into, If the panel only has a 30A, you are out of luck.
I have a 30 amp male to 50 amp female if I run into that situation of only a 30 amp panel. And yes, a 50 amp male to 30 amp female to plug into EMS. So the EMS would be between both dog bones... think that would be of any concern?
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Old 07-28-2019, 03:04 PM   #4
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You may have to talk to PI about that situation since the adapter puts the same 30A leg on both the 50A legs.
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Old 07-28-2019, 03:37 PM   #5
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You may have to talk to PI about that situation since the adapter puts the same 30A leg on both the 50A legs.
I will contact them in the morning. Will post their response once I receive it. Thanks!
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Old 07-28-2019, 05:57 PM   #6
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i can't see a problem. many people have hardwired 50 amps units and occasionally have to use an adapter to plug into a 30 amp outlet. once power passes the ems the 50 to 30 adapter will simply pick up one output leg. the other leg will be unused. all of the monitoring and error reporting within the unit is on the input side.
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Old 07-28-2019, 06:17 PM   #7
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i can't see a problem. many people have hardwired 50 amps units and occasionally have to use an adapter to plug into a 30 amp outlet. once power passes the ems the 50 to 30 adapter will simply pick up one output leg. the other leg will be unused. all of the monitoring and error reporting within the unit is on the input side.
It makes sense and I that is why I purchased the 2 adapters yesterday from Amazon. I figured maybe someone has done this and would reassure me it was ok. I googled every possible wording to this situation and no real answers. I would have bought a 30 amp unit, but this was a steal at $80 from local craigslist ad.

I guess they wouldn't make a 30a male to 50a female dog bone if it would just cause electrical problems...
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Old 07-28-2019, 07:54 PM   #8
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just so you know how the adapter work:

30 amp male to 50 amp female - takes the one hot lead from the 30 amp receptacle and puts it on both of the 50 amp leads. this way both legs of you 50 amp cord will have power on them. you are still limited to 30 amps total by the pedestal breaker which will trip. the 50 amp breaker in the trailer will not trip.

50 amp male to 30 amp female - this just takes one of the 50 amp power legs and passes it through to the 30 amp power leg. the other 50 amp power leg is unused. typically you would use this to plug a 30 amp trailer into a 50 amp pedestal. the pedestal will not limit you to 30 amps. but the 30 amp breaker in the trailer should.
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Old 07-29-2019, 12:00 PM   #9
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Just got word back from Progressive Industries in regards to this topic.

It is not advised to use a 50 amp surge protector on a 30 amp RV. 1.) if you are plugged into a 50 amp source and the unit detects an issue on line 2 it will shut your power off even though you are not using the second line. 2.) The more adapters you add the more fail points you introduce into the electrical circuit.



Brad Schneider

Technical Service Representative

Technical Service

800.307.6702 direct

progressivetech@powerprodllc.com technical@marinco.com

Well it is not advised... it is still possible!
I will try and make a few bucks and sell this unit and get a 30 amp unit. Any suggestions as to sticking with this brand or going another route?
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Old 07-29-2019, 12:10 PM   #10
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You should have no trouble selling it, assuming you don't price it too high. If it was hardwired, I might buy it and sell my portable. I LOVE the portable but I want an Autoformer and I can't figure out how to validly use both as portables.
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