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Strange Readings .... #108145 05/24/04 07:08 PM
Joined: Oct 2000
Posts: 3,632
Admin Offline OP
I went out to troubleshoot some tennis court lighting at a LARGE house & was curious why I was getting 240V between ground & neutral! I'll let the pics explain themselves.. Gotta love the mounting job on the sealtite!

[Linked Image]

[Linked Image]

2017 / 2014 NEC & Related Books and Study Guides
Re: Strange Readings .... #108146 05/24/04 07:28 PM
Joined: Feb 2004
Posts: 74
CRM Offline
Let me take a guess, that neutral which is spliced in the panel came loose, or was the bonding screw, which bonds the neutral to the panel left in by mistake.

[This message has been edited by CRM (edited 05-24-2004).]

Re: Strange Readings .... #108147 05/24/04 07:40 PM
Joined: Feb 2004
Posts: 1,436
Lostazhell Offline
CRM.... I opened a jbox down the line from here & noticed my hotstick lit up on the white & green wires... metered them & got 240V... Someone didnt seem to understand what colors to use for hots when this was installed!


Re: Strange Readings .... #108148 05/24/04 07:42 PM
Joined: Mar 2004
Posts: 391
BigJohn Offline
When I saw these photos my code book just burst into flames.


Do you know who in the world did that work? What were you trouble-shooting?

Is that undersized green conductor being used as the line-side neutral?
Where are any EGCs?
Where's the equipment ground bus?


[This message has been edited by BigJohn (edited 05-24-2004).]

Re: Strange Readings .... #108149 05/24/04 07:47 PM
Joined: Jan 2003
Posts: 4,391
iwire Offline
The mis-use of colors is a concern but what really worries me is I see no grounding conductor heading out the LT.

Or do I see a black 12 AWG as the grounding conductor for 30 amp circuits?

[This message has been edited by iwire (edited 05-24-2004).]

Bob Badger
Construction & Maintenance Electrician
Re: Strange Readings .... #108150 05/24/04 09:11 PM
Joined: Mar 2004
Posts: 98
OreElect Offline
Good one Bigjohn,code book burst into flames!lol
Yea,that job looks like home owner Bob and shade tree neighbor job, I`ll bet his wife was impressed though.My hubby can do anything,Dont you just love it.

Re: Strange Readings .... #108151 05/24/04 09:12 PM
Joined: Mar 2004
Posts: 98
OreElect Offline
Oh and I forgot to mention the free advice from the Home depot dude.

Re: Strange Readings .... #108152 05/25/04 12:24 AM
Joined: Mar 2001
Posts: 333
stamcon Offline
The line EGC is the smaller green conductor landed on the neutral bar [Linked Image]. The line grounded conductor(unidentified)is the one spliced with the blue wire nut [Linked Image]. The load grounded conductors are also black [Linked Image]. Green and white ungrounded load conductors [Linked Image]. At least the panel is a Square D [Linked Image](Homeline?).

Re: Strange Readings .... #108153 05/25/04 05:40 AM
Joined: Aug 2001
Posts: 7,520
pauluk Offline
[Linked Image]

Just how much lighting is out there, that needs two 30A 240V circuits plus another 120V circuit? (Is that 20A on the single-pole breaker? Can't quite make it out on my monitor.)

Re: Strange Readings .... #108154 05/25/04 06:56 AM
Joined: Dec 2000
Posts: 4,286
electure Offline
Where were the conductors landed on the load side?
It seems like anyone with the smarts to use the oversize conductors should have had the smarts to know about the grounding/grounded conductor stuff.
Homeline is the "Premier" brand available at our Home Depots, BTW.

Most of the 3/4" LTFMC we use is listed as an equipment grounding conductor up to 60 Amps, 1/2" to 20 Amps.

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