Ground Fault trips 50 amp breaker

[Jim G]

When plugging in to shore power the 50 amp breaker yrips. After a lot of troubleshooting I have found the problem to be on the 120v breaker box at post R7. Can anyone advise where R7 is connected to ?. I have disconnected the common on this circuit and the breaker no longer trips.

 

[Jim G]

When plugging in to shore power the 50 amp breaker yrips. After a lot of troubleshooting I have found the problem to be on the 120v breaker box at post R7. Can anyone advise where R7 is connected to ?. I have disconnected the common on this circuit and the breaker no longer trips.

 

[Kevin D Pem]

That's not a ground fault, that's a short.

It won't be hard to find even with a multi meter.

 

[osuallen]

You are going to have to provide a lot more information. No one here has any idea what year, make, and model RV you have.

 

[osuallen]

If you disconnected the Neutral (usually the white wire) you no longer have a complete circuit so something is not powered. If it is still powered, you have a serious electrical problem.

 

[Jim G]

Sorry I was in a hurry. 2018 Fleetwood Southwind 36P. Plug in the rv and 50 amp breaker at the post pops. Checked the input and output on the onboard surge protector. Had good service coming in but on the output when the common wire was disconnected to the coach the breaker did not trip. Disconnected every white wire in the coach 120v breaker box and the 50 amp breaker did not trip so disconnected all white wires at the bresker panel and connected them on at a time. The one that trips the 50 amp service to the rv is a connection on the top of the panel that is labeled R7 and is not to a breaker. The rv systems seem to work o.k. with r7 disconnected from the common side but I would like to find out where the circuit goes to resolve the problem. I studied the schematics to the coach with no success. Have contacted Fleetwood twice but no reply.

 

[Kevin D Pem]

Ok Jim.

Let me start this way.

By disconnecting all the white wires you made your RV the most dangerous rig I have heard about to date.

Every wire that is connected is hot as long as breakers are turned on.

Unplug the RV until you have connected every common wire to the common buss.

Even still leave unplugged until you have checked continuity between all black/red wires to common, and found the wires that are not open. The one(s) that have continuity are your problem circuits.

The top breaker is the main breaker. If there is more than one it may be a feeder from generator/inverter circuit.

For safety sake I will say this! Call a certified electrician. What you tell me you have done to this stage, tells me you should call before you kill yourself, or someone you love.

You might be mad at me now, but you will thank me later.