I was looking at the wiring in my parent's house and i noticed a
couple of 3 prong outlets where the ground wire was only attatched to
the metal receptacle box (by a screw) but not connected to the
grounding screw of the outlet itself.
I don't believe, but i didn't test it, that there is any sort of 'self
grounding clip' or anything which connects the grounding screw of the
outlet to the box thus making the outlet grounded as well. But i
guess i could have missed it.
Assuming that it resally is as i initially thought, box is grounded
but outlet is not, is this a normal occurence at all or an example of
wiring that needs to be fixed?
It is not a GFCI outlet nor is it protected by a GFCI outlet.
Thanks for any replies.
You can buy a wire pigtail that clips on the metal box so you can ground
ordinary outlets, or you can buy "self-grounding" outlets that have a
little flat copper spring on one of the mounting holes -- it will make
good electrical contact with the box even if the screw is not as tight
as it ought.
The mounting arms of the outlet serve as the ground connection. The
outlet is grounded through the metal box and conduit.
Yep, there is a clip, which goes on the mounting screws which insures
they are electrically connected, even if the screw is loose. I've seen
them on new outlets, I don't think they are available separately.
Again, the metal mounting arms of the outlet are connected to the ground
terminal. The screw lug connection is only needed if you want to
connect a ground wire to the outlet.
As long as you have a good mechanical connection to metal box and
conduit, the outlet is grounded.
Thanks. I didn't realize that the mounting arms of the outlet were
common with the ground terminal screw. For a moment this made me
wonder why there was a screw but i guess if you have one of those
plastic boxes then you'd have to use the screw.
I don't buy it.
I have never found a receptacle that was bonded satisfactorily to the
If you want safety and reliability without trying to save 60 seconds
of time, do it the right way.
Wire the box AND the receptacle to a wirenut to ground.
On Fri, 16 Jul 2004 15:10:00 GMT, kevins_news2
Sounds like someone was in a hurry, and wasn't doing it for themself.
Nothing better than a direct connection, rather than relying on a
secondary one, that might become loose, oxidize, or whatever.
If it were me I would redo them all to be hard wired.
On Thu, 15 Jul 2004 20:04:49 GMT, kevins_news2
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.