ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Burning out of return(white) side of 120volt rec
by crselectric. 06/14/19 02:15 AM
Video door bell causing chime activation of coil
by JoeTestingEngr. 06/13/19 12:43 PM
Troubleshooting Voltage Drop Across Relay
by gfretwell. 06/09/19 11:49 AM
Apple Recalls Three-Prong Wall Plug Adapters
by Admin. 06/05/19 09:06 PM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 10 guests, and 25 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
sharing neutral between 240 and 120 #168961
09/22/07 10:48 AM
09/22/07 10:48 AM
D
dilydalyer  Offline OP
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
Re: sharing neutral between 240 and 120 [Re: dilydalyer] #168962
09/22/07 11:11 AM
09/22/07 11:11 AM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,365
Estero,Fl,usa
300.3(B)?


Greg Fretwell
Re: sharing neutral between 240 and 120 [Re: gfretwell] #168971
09/22/07 04:24 PM
09/22/07 04:24 PM
G
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
Re: sharing neutral between 240 and 120 [Re: gibbonsseabee80] #168978
09/22/07 11:46 PM
09/22/07 11:46 PM
L
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.


Re: sharing neutral between 240 and 120 [Re: leland] #169010
09/23/07 04:46 PM
09/23/07 04:46 PM
D
dilydalyer  Offline OP
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??

Re: sharing neutral between 240 and 120 [Re: dilydalyer] #169011
09/23/07 05:09 PM
09/23/07 05:09 PM
G
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

Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Bill Addiss
Bill Addiss
NY, USA
Posts: 3,905
Joined: October 2000
Show All Member Profiles 
Top Posters(30 Days)
Khombo 2
Popular Topics(Views)
255,758 Are you busy
191,724 Re: Forum
181,493 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.029s Queries: 15 (0.005s) Memory: 0.9772 MB (Peak: 1.1254 MB) Zlib enabled. Server Time: 2019-06-19 13:38:54 UTC