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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: [GMCnet] 120Vac Wiring from Onan to Coach, 75' Avion w/ 6k Powerdrawer [message #316574 is a reply to message #316572] Mon, 24 April 2017 20:56 Go to previous messageGo to previous message
richshoop is currently offline  richshoop   United States
Messages: 190
Registered: April 2017
Karma:
Senior Member
The color code you listed IS the standard color code as specified by NEMA and UL. I would be very surprised if aftermarket installers would use something different as all the RV cords I have seen follow the identical color code.

----- Original Message -----

From: "D C _Mac_ Macdonald"
To: gmclist@list.gmcnet.org
Sent: Monday, April 24, 2017 6:38:16 PM
Subject: Re: [GMCnet] 120Vac Wiring from Onan to Coach, 75' Avion w/ 6k Powerdrawer

If I'm not mistaken, with the 6 kW Onan power drawer, a single 120 Volt AC output is fed to BOTH the L1 and L2 terminals on the female power socket into which you plug the four-conductor power cable. The L1 and L2 wires of the power cable each feed separate circuit breakers to power 120 Volt circuits in the coach. This arrangement allows you to connect to 50 Amp 240 Volt power pedestals in a campground or a dedicated power 50A/240V circuit at your home! Once again, if memory is working, L1 and L2 wires in the CABLE are Black and Red. The neutral is White, and the safety ground is Green. That should be standard in a GMC coach, but there's no telling what aftermarket finishers did with a Transmode rolling chassis and shell.


~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ Since 30 November '53 ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ Member GMCMI and Classics ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ~ TZE166V101966 ~ ~ ~ ~
~ ~ ~ '76 ex-Palm Beach ~ ~ ~
~~ k2gkk + hotmail dot com ~~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
______________
|[ ]~~~[][ ][]\
"--OO--[]---O-"




________________________________
From: Gmclist on behalf of A.
Sent: Monday, April 24, 2017 18:21
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] 120Vac Wiring from Onan to Coach, 75' Avion w/ 6k Powerdrawer
David del Rio wrote on Mon, 24 April 2017 17:53
> I completely removed, moderately refurbished, and serviced this Onan. Every connection, wire, bolt and screw were returned to their original
> positions.
>
> The very last connections are for the 120Vac system. I'm not certain about the LII leg as shown in this photo. Perhaps a look at your Onan will
> shed some light on this for me.
>
> Thank you!
>
> This photo illustrates my question:
> http://www.gmcmhphotos.com/photos/data/6992/Onan_120Vac_Wiring.jpg
Either L1 or L2 is internally grounded to the Onan case. I have seen one document that shows L1 is ground, and another shows L2 as ground. No one here
could (or would) tell me which drawing was correct.

Turn the 120V breaker off and put an ohmmeter between the generator case section and the L1 wire. If the resistance is close to zero, that's ground
and neutral for the 120VAC stuff. If it is not close to zero, check L2 as it should be close to zero. One is ground and neutral, the other is 120VAC.

This drawing is either right, or bass ackwards. Interchange L1 and L2 as required so that the one that is grounded internally in the Onan is
ground/neutral and the other feeds the hot side of the AC system.

http://www.gmcmhphotos.com/photos/data/10/Onan_and_Receptacle_120VAC_Wiring.jpg
--
73 23' Sequoia 4 Sale
73 23' CanyonLands Parts Unit 4 Sale
Upper Alabama
"Every day I become more convinced that I am the only person left on the planet that recognizes nonsense for what it is."

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[http://www.gmcmhphotos.com/photos/data/6992/Onan_120Vac_Wiring.jpg]

[http://www.gmcmhphotos.com/photos/data/10/Onan_and_Receptacle_120VAC_Wiring.jpg]
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