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#168961 - 09/22/07 10:48 AM sharing neutral between 240 and 120  
dilydalyer  Offline
Member
Joined: Jan 2007
Posts: 59
tennessee
My boss at work the other day told a guy to rob a neutral from the living room outlet to the 12-2 hr in livingroom for fireplace.The fireplace drawed the same at 4 different voltages but my boss said at 240 this model could do something it couldn't do at 120.............Any thoughts?


Work Gear for Electricians and the Trades

#168962 - 09/22/07 11:11 AM Re: sharing neutral between 240 and 120 [Re: dilydalyer]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,056
Estero,Fl,usa
300.3(B)?


Greg Fretwell

#168971 - 09/22/07 04:24 PM Re: sharing neutral between 240 and 120 [Re: gfretwell]  
gibbonsseabee80  Offline
Member
Joined: Oct 2005
Posts: 40
Chesapeake, VA
I would get more information on what he was trying to accomplish. Robbing or borrowing a neutral alone sounds fishy to me. If someone turns off the power for the fire-place, you are still going to have current present inside the connection box of the fireplace (from the livingroom rececptacles. Sounds like a short-cut or a quick fix based on the information provided.


Brian Gibbons

#168978 - 09/22/07 11:46 PM Re: sharing neutral between 240 and 120 [Re: gibbonsseabee80]  
leland  Offline
Member
Joined: Aug 2007
Posts: 853
Lowell area, Ma. USA
Find a new employer.
This guy will make you screw up. Then your screwed.

Better still, Tell the Boss "NO".
Your the PRO. you live with your actions, Regardless of direction.

Thats what they will fall back on.

CYA---CYA-----CYA.



#169010 - 09/23/07 04:46 PM Re: sharing neutral between 240 and 120 [Re: leland]  
dilydalyer  Offline
Member
Joined: Jan 2007
Posts: 59
tennessee
Yeah,seems to me you have at least two breakers on same phase sharing neutral nomatter what.Does that matter??


#169011 - 09/23/07 05:09 PM Re: sharing neutral between 240 and 120 [Re: dilydalyer]  
gibbonsseabee80  Offline
Member
Joined: Oct 2005
Posts: 40
Chesapeake, VA
If you had two breakers from the same phase, you would not be able to get 240volts. You would get a meter reading of 0 between both hots in the connection box of the fireplace. You will only get 120volts. Now if both breakers are using the same neutral (same phase), you can have excessive current on that neutral. Also, if one of the breakers trips, there will still be voltage present from the other circuit in the connection box. I would not borrow or rig anything. I would homerun a 12/3 cable back to the panel as a dedicated line if it needs a 240volt branch circuit.


Brian Gibbons


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