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Home » Public Forums » GMCnet » 120Vac Wiring from Onan to Coach, 75' Avion w/ 6k Powerdrawer (Does the LII connect to the chassis?)
Re: 120Vac Wiring from Onan to Coach, 75' Avion w/ 6k Powerdrawer [message #316612 is a reply to message #316609] Tue, 25 April 2017 17:19 Go to previous messageGo to previous message
A Hamilto is currently offline  A Hamilto   United States
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Registered: April 2011
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JohnL455 wrote on Tue, 25 April 2017 16:30
...There is confusion as these were available as 240 V for export and they did not relabel for domestic as I understand. You need to confirm which is from open breaker load side and which is chassis as previously mentioned above. It might be easier to refer to the hots at the 14-50R as X and Y. (I'm assuming you have a 14-50 and not TT-30.) The hot goes to X and a short jumper applies it to Y as well.
There is confusion because one version of document with the 120V domestic unit conflicts with another document showing the same unit.

I can't make it any clearer than showing you the two pdf drawings linked in that post.

One shows L1 hot and the other shows L2 as hot.

In the case of delrio's system, he has two black wires and one white wire going through the flex conduit to the 50A outlet, or the switchgear. Presumably one black goes to X and one to Y, there wouldn't need to be a jumper between X and Y, but there would need to be one from neutral to ground at the receptacle/switchgear in order to ground back to the source (the Onan).

You are correct that "You need to confirm which is from open breaker load side and which is chassis as previously mentioned above."

I am aware of at least three ways that the hot(s), neutral and ground get to the prongs on the 50A receptacle.

1. A single black and a single white in flex conduit with a jumper between the hots and a jumper between neutral and ground at the receptacle.
2. Three wires in the flex conduit. Two blacks to the receptacle, one to X and one to Y, and one white with a jumper between neutral and ground.
3. A cord with black, red, white and green to the plug, hots tied together at the Onan breaker and neutral and ground tied together in the splice/junction box.

I can get them right if I have eyes and hands on the system, but trying to keep someone safe from a keyboard is a challenge.

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