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-   -   Just installed new electrical box - open ground? (http://www.diychatroom.com/f18/just-installed-new-electrical-box-open-ground-195132/)

wixman 01-30-2014 09:56 AM

Just installed new electrical box - open ground?
 
I just replaced an electrical box - it's a plastic cut in box. My tester is saying 'Open Ground' - is that ok for a plastic box? I've read that plastic boxes don't need grounding

seansy59 01-30-2014 10:01 AM

Plastic isn't conductive...just stating the obvious... :)

What kind of cable is feeding the receptacle?

2 wire or 3 wire? Cloth covered? If it is a 3 wire, and you have no ground still...then your ground wire is fake...

If it is 2 wire, you cannot put a 3 prong receptacle in...it must be 2 prong, or a GFCI outlet labeled (No equipment ground)

If it is a fake ground, back to a 2 wire outlet...and check your other outlets...because someone might of done the whole house like that, which is dangerous...


You DO have the ground wire connected to the outlet ground, right?

joecaption 01-30-2014 10:02 AM

What type wiring do you have and how many wires?
Was there a metal box with metal conduit before?

wixman 01-30-2014 10:09 AM

It was a 2 gang metal box before nailed to the stud with metal conduit. I'm pretty sure it's 2 wire, but I can double check. There's 2 black and 2 white coming in, and 2 short wires bridging across the receptacles. I noticed when old box was removed, and the power was back on my patio lights weren't working.

I don't know a great deal (anything) about electrical work

wixman 01-30-2014 10:12 AM

Oh and it's not cloth covered. This is in the room attached to our garage

joed 01-30-2014 10:53 AM

The metal conduit was the ground. Put a metal box back in and ground to the box. All should be well.

Stubbie 01-30-2014 11:06 AM

Quote:

Originally Posted by wixman (Post 1298987)
It was a 2 gang metal box before nailed to the stud with metal conduit. I'm pretty sure it's 2 wire, but I can double check. There's 2 black and 2 white coming in, and 2 short wires bridging across the receptacles. I noticed when old box was removed, and the power was back on my patio lights weren't working.

I don't know a great deal (anything) about electrical work

That has nothing to do with the box grounding. Just do as joed explained and be sure the metal conduit is fastened to the metal box properly.

Why did you change out the metal box to plastic ?

wixman 01-30-2014 11:28 AM

Thanks guys! I'll take care of this tomorrow. I guess I needed to replace the box, and wasn't aware of any difference between plastic and metal.

wixman 01-30-2014 03:23 PM

I did it! It says CORRECT now!

I can't tell you how happy this makes me!

Thanks! :thumbup:

stickboy1375 01-30-2014 05:00 PM

You could have just used a bonding bushing if you wanted to use the plastic box.

Stubbie 01-30-2014 10:25 PM

Quote:

Originally Posted by stickboy1375 (Post 1299235)
You could have just used a bonding bushing if you wanted to use the plastic box.

I thought about that but somehow I got the picture that he probably didn't have a plastic box that would accept conduit. He just had the individual wires exiting the conduit and then coming into the plastic box through a knock out tab or holding tab like on a carlon blue.

wixman 01-31-2014 12:10 AM

Quote:

Originally Posted by Stubbie (Post 1299423)
I thought about that but somehow I got the picture that he probably didn't have a plastic box that would accept conduit. He just had the individual wires exiting the conduit and then coming into the plastic box through a knock out tab or holding tab like on a carlon blue.

Correct!

stickboy1375 01-31-2014 06:07 AM

Quote:

Originally Posted by Stubbie (Post 1299423)
I thought about that but somehow I got the picture that he probably didn't have a plastic box that would accept conduit. He just had the individual wires exiting the conduit and then coming into the plastic box through a knock out tab or holding tab like on a carlon blue.

Yeah, guess i was fixated on the fact that you 'could' do it, but not how the OP 'had' done it... :laughing:

k_buz 01-31-2014 06:14 AM

I'm still wondering why he was replacing the box.


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