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RM travelers · 12-23-2017, 10:40 AM

Don’t know about your model MH, but on our 16Bounder33c, microwave only works off Gen or Shore, won’t work on inverter. Residential Refer works off inverter as do most 110v outlets, but not all outlets. Have 4 6v batteries, but guess mfg wired to conserve battery life for most needed items.

Road-Chi · 12-23-2017, 11:55 AM

Our coach is a 2002 Newmar Mountainaire DP and the inverter/charger is a Trace RV2012M which, according to the manual, produces modified sine wave power.

Thanks for everyone's comments. Very educational for me. Guess at this point our plan is to put in a better grade GFCI and to make sure it is compatible with MSW's. Probably go with 15 amp.

twinboat · 12-23-2017, 12:02 PM

You may need a cheaper GFCI. I would buy what you took out, if you still have it.

hohenwald48 · 12-23-2017, 06:48 PM

Quote:

Originally Posted by Road-Chi

Our coach is a 2002 Newmar Mountainaire DP and the inverter/charger is a Trace RV2012M which, according to the manual, produces modified sine wave power.

Thanks for everyone's comments. Very educational for me. Guess at this point our plan is to put in a better grade GFCI and to make sure it is compatible with MSW's. Probably go with 15 amp.

The issue is not that you need a "better" grade. It's just that some GFCIs are ok with MSW and some are not. It even states that in some of the inverter owners manuals.

Gary RVRoamer · 12-24-2017, 08:45 AM

Quote:

Are the LINE and LOAD terminals reversed?

That would effect all the 120v sources, not just the inverter.

rgvtexan · 12-24-2017, 08:56 AM

Quote:

Originally Posted by Gary RVRoamer

That would effect all the 120v sources, not just the inverter.

On the GFCI receptacle.

The second link in post #13 lists GFCIs that will/will not, work of Zantrex MSW

CharlesinGA · 12-24-2017, 05:56 PM

The difference between a 15 amp and a 20 amp GFCI is the shape of the slots on the front....... period. All 15 and 20 amp GFCIs have 20 amp pass thrus, so the contacts and mechanism inside is always rated for 20 amps. If you peer inside the slots of a 15 amp version, you will see the horizontal blade contact of a 20 amp sitting there, its just that you cannot use it.

Have you ever seen a device with a 20 amp/120v plug on the cable? I haven't, except possibly a few mig welders, you won't find much that has them. The 20 amp is a waste of your money, they charge more because they can, thats all.

Charles

steined · 12-30-2017, 10:59 PM

I had a similar issue with gfci fuses. Ended up being a ground was not connected in the inverter for one of the legs of AC. Open the panel that has the connections under it and see if anything is amiss. I bought a new sine wave magnum unit and didn't need to. Happy I switched but unneeded.

Gary RVRoamer · 12-31-2017, 10:49 AM

Quote:

Ended up being a ground was not connected in the inverter for one of the legs of AC.

That's strange, since operation of the GFCI has nothing to do with grounding. Or at least is not supposed to. A properly designed GFCI device will work on a circuit that has no ground wire at all. In fact, GFCI protection is strongly recommended on antique wiring that has no grounding.

nothermark · 01-01-2018, 06:37 AM

One side of wiring has been grounded for longer than we have been around. What they added was the extra ground so there are effectively two ground wires.

twinboat · 01-01-2018, 07:30 AM

One of the conductors ( neutral ) is bonded to ground at the source, but the ground wire is not designed to carry current, except when there is a fault. They are not the same.

The added a non current carrying ground as a safety path to

nothermark · 01-02-2018, 06:07 AM

The point was old wiring has a ground side. The extra wire was added to provide a redundant safety path not a grounding function.

Quincy · 01-02-2018, 11:20 AM

Thoughts are.

1. Maybe the microwave is the issue with the GFI clicking and not the inverter. I see that has already been suggested,

B. Kitchen wiring should be 12ga and even MH's have to follow the NEC (I believe) So even if the circuit protection is 20 amp should be ok.

3. I believe microwaves have to have their own dedicated circuit but I thought it was supposed to be 20 amp so I am wondering why only 15 amp protection? Guess I am mistaken.

Anyway, I had my say...

twinboat · 01-02-2018, 12:16 PM

Quote:

Originally Posted by Quincy

Thoughts are.

1. Maybe the microwave is the issue with the GFI clicking and not the inverter. I see that has already been suggested,

B. Kitchen wiring should be 12ga and even MH's have to follow the NEC (I believe) So even if the circuit protection is 20 amp should be ok.

3. I believe microwaves have to have their own dedicated circuit but I thought it was supposed to be 20 amp so I am wondering why only 15 amp protection? Guess I am mistaken.

Anyway, I had my say...

With some of the wiring in my MH, I wonder if they follow the NEC.

NEC requires a wire support within 8" of a junction box. I don't see any wire supports, anywhere in my MH. Maybe that's because the don't use junction box's in my MH.

There is a RVIA code that they follow.