High voltage on Progressive EMS

[Philip Jones]

Hi all,

I have the Progressive EMS PT-50 for protecting my trailer’s circuitry.

Problem is, when I plug in at home and my sister’s house, L1 always reads a high voltage on L1 (as high as 220V) even though L2 reads normally (around 120V as expected). I have tested my mains and the multimeter reads 120 too so I am convinced the voltage on L2 is correct.

The power gets to the Progressive via a garage 15 amp circuit through two dog bones: 15 to 30a and 30 to 50a. I have tried two completely different sets of dog bones with the same result.

When I bypass the surge protector, everything electrical seems fine in the trailer.

Can anyone comment? When I hook directly into campsite 50a power everything reads normally. Is my problem with he surge protector, the dogbones, or something else?

Many thanks for any help!

Phil

[Philip Jones]

To make matters more interesting, I now have plugged my electrical outlet tester into the RV and I find that it is reading open neutral. Does this help diagnose the problem?

[Philip Jones]

Actually, I tried another tester and it states open ground. I have thrown out the other one as apparently one LED is not functioning.

[mythbuster88]

How about some pictures of your setup with all the dog bones. That would help.

[mythbuster88]

So for the record when I tried to do what you are doing my 50Amp Progressive device would not pass current because there was a ground fault detected. So when using 15A or 20A service I don't use the Progressive device.

[Philip Jones]

Originally Posted by mythbuster88

So for the record when I tried to do what you are doing my 50Amp Progressive device would not pass current because there was a ground fault detected. So when using 15A or 20A service I don't use the Progressive device.

Sorry but my trailer is in storage now so I don’t have photos, but it was 15-30-50 with two dogbones.

Given your comment about the ground fault, perhaps I am better off just manually checking “foreign” 15a outlets using my multimeter to ensure safety and then just using the Progressive for 30a and 50a services.