Help what are these, and what do they feed?

[432bartman]

Trying to narrow down a short circuit. Plugging into different outlets it's blowing my fuse to the house. Could these two things or the fridge outlet be the culprit? Sorry the picture is sideways

[Mikendebbie]

I forget what those are called but they are the RV industry equivilent to a junction box and wire nuts in your S & B.

[BB_TX]

Those things have been known to overheat and burn them black. But those don’t appear damaged.

With shore power disconnected, turn off all individual 120 vac breakers and then plug into shore power. Then one by one turn on each individual breaker until it blows the house power. That should get you down to the specific circuit causing the problem.

[jsb5717]

Just trying to understand your set up. You are plugged into shore power at your house? The breaker for that outlet in the house keeps tripping? You've tried different outlets and different breakers are tripping?

What is the Amp rating of that outlet/breaker? Is it a GFCI outlet?

[432bartman]

Well, a local RV shop advised they are just quick disconnet fittings for AC power, and there are no fuses or breakers in them. My GFI outlet in my garage kept tripping, and it seems those outlets connected to the GFI did not like being hooked up to my trailer. I switched to an outlet that was not on the GFI and all is well. I started to go crazy trying to hunt down the problem, thinking the whole time it was my trailer and not my actual house. Lol. Thank you everyone for helping out.

[Carl n Susan]

Originally Posted by 432bartman

Help what are these, and what do they feed?

It has taken m two days to remember the name of these plastic do-dads. The are Molex connectors that RV manufacturers use to transition 120V wire from Romex to stranded or vice versa. They avoid having to have a junction box and wire nut connectors and are good for mobile applications where movement of the wire is expected.
Mikendebbie provided a lot of information about these in Post #26 of Thread https://www.montanaowners.com/forums...ad.php?t=91343

[BB_TX]

You are not the first to have problems plugging their trailer into a GFCI shore power source. Apparently the downstream GFCI outlet performing a self test can cause the upstream GFCI outlet to see that as a load imbalance and trip.

[Daryles]

Originally Posted by 432bartman

Trying to narrow down a short circuit. Plugging into different outlets it's blowing my fuse to the house. Could these two things or the fridge outlet be the culprit? Sorry the picture is sideways

Blowing fuse TO the house?

OR

Tripping the breaker in the house??

IF the house receptacle is a GFIC Circuit, it is a KNOW issue RVs and HOUSE GFIC do not get along.
Try plugging into a NON-GFIC in the house.

It's best to install a dedicated 50A Circuit like what you have at a pedistal.

[Foldbak]

Originally Posted by Carl n Susan

It has taken m two days to remember the name of these plastic do-dads. The are Molex connectors that RV manufacturers use to transition 120V wire from Romex to stranded or vice versa. They avoid having to have a junction box and wire nut connectors and are good for mobile applications where movement of the wire is expected.
Mikendebbie provided a lot of information about these in Post #26 of Thread https://www.montanaowners.com/forums...ad.php?t=91343

Thanks Carl, I went down the rabbit hole yesterday googling and couldn't find the name. Drove me nuts.