1950's Wiring

[randynavarro]

In our parts, three-wire grounded cable started being used consistently in the mid to late 50's. I would think this to be fairly common across the country?

I can see the three-wire cable in the main panel, yet there are only two-slot receptacles in the walls.

It's my understanding that the ground wire was used to ground/bond the metal j-boxes but obviously not the outlet as there was no third terminal.

Is this true?

And secondly; is upgrading as easy as using a grounding jumper from the metal box to a new three-slot outlet?

[Bill Kibbel]

It's my understanding that the ground wire was used to ground/bond the metal j-boxes but obviously not the outlet as there was no third terminal.

Is this true?

Usually, but you can confirm with a meter.

...is upgrading as easy as using a grounding jumper from the metal box to a new three-slot outlet?

There are also "self-grounding" outlets that can be installed for the same result.

[paul burrell]

Originally posted by SonOfSwamp

Three-wire came along in the mid- late-60s here in assbackwards Nashville. I call it post-Johnson wiring. As in LBJ.

WJ

Excuse me WJ but we say bassackwards down here in Ga. Just a little trivia.[}]

[msteger]

Randy.. its not too common here until into the 1960s. Being here in PA, where we didn't have statewide building codes until 2004, I see all sorts of weird things. I do a lot of rural homes, so virtually no building codes ever until a few years ago. Lots of ungrounded 3 wire receptacles, etc.

[Nolan Kienitz]

Originally posted by paul burrell

Originally posted by SonOfSwamp

Three-wire came along in the mid- late-60s here in assbackwards Nashville. I call it post-Johnson wiring. As in LBJ.

WJ

Excuse me WJ but we say bassackwards down here in Ga. Just a little trivia.[}]

Walter is just probably keeping it "alphabetically" in sequence.