50 A power cord

[mrkane1952]

Greetings All:

What is the pin-out for the coach end of the 50 A. cord (the 7764
connector)? The replacement plug is marked "X-Y-Z-Green" and "Z" is
opposite to the outer ground tab.

The original was stolen.

Thanks--

M.R.Kane
1985 PT40
currently Sanger, TX

[Pete Masterson]

Here's a web page with the pin wiring diagram for a variety of plugs/sockets.

<http://www.frentzandsons.com/Hardware%20...uratio.htm>

Drop to the bottom of the page for the 50 amp 4-wire plug.

G is the ground (center top), the other markings should be W-X-Y. "W" is white and is the neutral -- it is the center bottom position. (Do not connect the neutral to the ground in an RV.) X and Y are the hot connections that go on the left and right positions. It doesn't really matter which is which. You get 120 vac between X and W and Y and W. You get 240 vac between X and Y. In most RVs, the WX and WY are the source of power for each "leg" of the system.

Pete Masterson

'95 Blue Bird Wanderlodge WBDA 42

El Sobrante CA

"aeonix1@mac.com"

On Jun 15, 2008, at 10:35 AM, mrkane1952 wrote:

Greetings All:

What is the pin-out for the coach end of the 50 A. cord (the 7764

connector)? The replacement plug is marked "X-Y-Z-Green" and "Z" is

opposite to the outer ground tab.

The original was stolen.

Thanks--

M.R.Kane

1985 PT40

currently Sanger, TX

[mrkane1952]

The problem with most available charts showing pin-outs, is that the
BB connectors are not NEMA standard twist-locks. In any event, the
"Z" terminal is the neutral on this version of the 7764 plug.

I am replacing a lost/stolen cord. I found surplus trailer cords on
ebay for ~$60 plus shipping: It is 36 feet long, 6/3 & 8/1 with a
molded-on 4-prong plug, other end no connector. (This is about 10
feet longer than the 50 A. cord that came with my '85.) It weighs
about 25 pounds, so not a bad deal with scrap copper running $3 around
here...and keep an eye on yours.

M.R.Kane
1985 PT40
currently Sanger, TX