The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!


2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
Parking lot pole light swap....
by gfretwell
Yesterday at 09:52 PM
International Wire Colour Codes
by Texas_Ranger
Yesterday at 08:24 AM
Son of Sparky
by HotLine1
10/20/16 07:43 PM
Speaking of Plugmold ...
by gfretwell
10/17/16 02:37 PM
Broken battery charger? Check for cobwebs!
by gfretwell
10/17/16 02:30 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 12
HotLine1 6
renosteinke 6
ghost307 5
Potseal 4
Who's Online
2 registered (Tjia1981, sparkyinak), 236 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#130547 - 07/20/06 05:20 PM Neutral question
canuck Offline

Registered: 07/15/06
Posts: 27
Loc: Canada
Hello I am new to ECN. It seems like a nice community of experienced electricians. Also a great reference as I am gaining more experience in this trade.

There are 18 sub panels that go to the meter stack in the closet (125 amp, 2 hot).

One of my co-workers installed a range outlet (50 amp) and the ground wire ended up touching one of the hot terminals on the back of the receptacle. I was installing devices in another suite when I used a meter I got a reading of 120 volts on the neutral. Even the hot with both breakers off was reading 106 volts to ground (at the sub panel). I managed to find the problem and fixed it.

How could there be voltage in another suite(s)?


[This message has been edited by canuck (edited 07-20-2006).]

#130548 - 07/21/06 07:25 AM Re: Neutral question
LarryC Offline

Registered: 07/05/04
Posts: 776
Loc: Winchester, NH, US
My guess is that someone installed the bonding jumper between the earth and the neutral at the sub panel your coworker was working in, and did not connect the ground wire coming from the main service.

The voltage you are reading is the 120 Volts from that neutral, going thru some small load to the hot leg, and then thru your meter to the properly connected ground in your subpanel.

#130549 - 07/21/06 07:52 AM Re: Neutral question
Radar Offline

Registered: 04/30/04
Posts: 349
Loc: Los Angeles, CA
Canuck - You're located where (approximately)? I'm with Larry on this - and I think you are in dire need of an experienced electrician to check all the wiring, starting at the meter stack. You have a potentially serious condition here.

There are 10 types of people. Those who know binary, and those who don't.

#130550 - 07/26/06 10:49 PM Re: Neutral question
canuck Offline

Registered: 07/15/06
Posts: 27
Loc: Canada
There are people with 30+ years experience (also the engineer) dealing with this now. I was just the person who discovered this issue and was curious about a possible explanation.

Everything in the sub panel and stack are fine (installed by qualified electricians). I'll let you know when the problem has be resolved.

I start school in a few days and I am looking forward to learning more about power distribution systems.

[This message has been edited by canuck (edited 07-27-2006).]

[This message has been edited by canuck (edited 07-27-2006).]


ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals