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Audiotekm 06-12-2011 03:15 PM

New Outlet Open Ground!!!!
 
I just installed a new duplex outlet in my garage, the cable was already run from previous owner. I installed a Leviton 8200IG
http://www.fruitridgetools.com/Store...4985822&c=7735
What I get with my tester is OPEN GROUND. The ground is attached to the green screw. I wonder why I get open ground as a result. There's another circuit in the garage and it shows CORRECT on my tester.

oh'mike 06-12-2011 03:31 PM

Did you open that box to see if that line started there? the ground wire is not 'grounded' wherever it started.

Audiotekm 06-12-2011 03:48 PM

Which "box" are you talking about? The AC comes out of a junction box in the garage, maybe I should take a look at it.

Audiotekm 06-12-2011 03:59 PM

OK so I checked where the line from the new outlet goes and it goes to that junction box. In that junction box it's all 2 wire, the ground from the new outlet is tie to the junction box chassis. For my new outlet do I need to have a little jumper from the ground screw to the box itself (chassis)?

oh'mike 06-12-2011 04:09 PM

If the box is grounded and the wire is attached to the box you should be good---test the box and see if it is grounded.

I am not very good at describing wiring----sorry if it's not easy to understand.--Mike--

Audiotekm 06-12-2011 04:13 PM

The duplex box is not grounded, just the outlet itself. Do I need to loop from the outlet to the box?

oh'mike 06-12-2011 05:00 PM

The box does not need to be grounded----when the outlet is installed the screw will ground the box.

I try to avoid answering electrical questions---while I have a good working knowledge I live in an area where Romex is not allowed and all wiring is done with conduit (meaning all boxes and conduit are grounded.)

I'll do the best I can. There are a bunch of licensed electricians here--- They must all be out enjoying the weather.---Mike---

kbsparky 06-12-2011 08:08 PM

You have installed an ISOLATED GROUND receptacle. Separate grounding wires have to be installed on the box and the receptacle.

AllanJ 06-12-2011 08:13 PM

Quote:

Originally Posted by oh'mike (Post 666028)
The box does not need to be grounded----when the outlet is installed the screw will ground the box.---

I used to squash the ground wire between the switch (or receptacle) frame (yoke) and the metal box using the mounting screw but an inspector told me I couldn't do that. I was supposed to provide two ground wire ends (using pigtails if needed), one to attach to the switch frame and the other to attach to the box using the green screws provided. Or use a switch with a special spring clip at the end of the yoke where it screws on and then only one ground wire end is needed, attached to the switch yoke.

sirsparksalot 06-12-2011 08:19 PM

Quote:

Originally Posted by Audiotekm (Post 665995)
OK so I checked where the line from the new outlet goes and it goes to that junction box. In that junction box it's all 2 wire, the ground from the new outlet is tie to the junction box chassis. For my new outlet do I need to have a little jumper from the ground screw to the box itself (chassis)?

In order for there to be an actual ground, the junction box needs to be grounded back at the panel. This is usually done through armored cable. You said the wires in the jbox were all 2-wire, so you need to trace the jbox to see if it actually attaches to the panel with armored cable, rather than Romex.

Audiotekm 06-12-2011 10:33 PM

Quote:

Originally Posted by kbsparky (Post 666180)
You have installed an ISOLATED GROUND receptacle. Separate grounding wires have to be installed on the box and the receptacle.

So what are my options?
Get a regular grounded outlet?


I think the junction box is grounded to the panel. I realized that the breaker for the garage is the same as the master bedroom and all those outlets are grounded

sirsparksalot 06-12-2011 10:54 PM

Quote:

Originally Posted by Audiotekm (Post 666255)
So what are my options?
Get a regular grounded outlet?


I think the junction box is grounded to the panel. I realized that the breaker for the garage is the same as the master bedroom and all those outlets are grounded

Do you have a bare grounding wire in the receptacle box? If so, I'd just get a regular duplex receptacle.

hpp58 06-13-2011 07:32 AM

Quote:

Originally Posted by Audiotekm (Post 665977)
I just installed a new duplex outlet in my garage, the cable was already run from previous owner. I installed a Leviton 8200IG
http://www.fruitridgetools.com/Store...4985822&c=7735
What I get with my tester is OPEN GROUND. The ground is attached to the green screw. I wonder why I get open ground as a result. There's another circuit in the garage and it shows CORRECT on my tester.

If this outlet is in a garage then it should be a GFCI.

AllanJ 06-13-2011 08:40 AM

Note that some armored cables including ordinary BX are not considered good and sufficient grounding conductors. Most qualifying armored flexible cables have a strip or wire for the grounding conductor running inside.

It is not unusual for loose connections to develop between the armored cable, the cable clamp, and/or the junction box at one or more locations, thus giving you an open ground.

Audiotekm 06-13-2011 10:58 AM

Quote:

Originally Posted by hpp58 (Post 666374)
If this outlet is in a garage then it should be a GFCI.

That was my first choice but isn't a GFCI outlet more complicated to install???


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