Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.
In Reply to: RE: Wiring outlet box posted by JB Coleman on April 14, 2017 at 15:57:42:
Licensed master electrician since 1986, the box needs to be grounded. Even when using grounding type receptacles it's still a good idea. As for the conduit being the ground for the box, that's only acceptable if certain criteria are met, such as all connectors and couplings shall be of the set screw type, if FMC (flexible metal conduit) (or greenfield as its often called) it must have the integral copper bond wire and can't be run more than 6' in length. If the knock outs are concentric all must be removed or even the set screw connector isn't considered a sufficient bond.
In the pictures above the one to the right would still need the box bonded by the ground wire, the conduit is connected with a compression connector, this is not considered a good enough bond.
In any event, there's absolutely no reason not to bond the box other than laziness.
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Topic - Wiring outlet box - JB Coleman 10:44:13 04/14/17 (22)
- RE: Wiring outlet box - jea48 12:32:16 04/14/17 (21)
- RE: Wiring outlet box - Uncle Mike 16:57:40 04/14/17 (15)
- RE: Wiring outlet box - jea48 18:54:08 04/14/17 (14)
- RE: Wiring outlet box - JB Coleman 08:30:12 04/15/17 (5)
- RE: Wiring outlet box - jea48 09:52:42 04/15/17 (4)
- RE: Wiring outlet box - Uncle Mike 03:40:36 04/15/17 (7)
- RE: Wiring outlet box - jea48 07:20:56 04/15/17 (0)
- RE: Wiring outlet box - Kingshead 05:33:14 04/15/17 (5)
- RE: Wiring outlet box - JB Coleman 15:57:42 04/14/17 (4)