ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Recent Posts
Electrode boilers question
by annemarie1. 04/27/17 01:40 PM
Why cables look like they do
by LongRunner. 04/26/17 09:36 AM
Dimmable LED 2x4 lay in fixtures
by HotLine1. 04/24/17 05:43 PM
Old decora style outlets
by Lostazhell. 04/22/17 07:59 PM
Permit Snafus...AHJs and Contractors Jump in
by gfretwell. 04/22/17 01:11 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
234,828 Are you busy
169,604 Re: Forum
162,853 Need opinion
Who's Online Now
0 registered members (), 54 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#84458 - 04/02/03 04:07 AM Undersized neutral????  
nykr95  Offline
Junior Member
Joined: Apr 2003
Posts: 2
Hi!

I recently replace an existing 30AMP 2 Pole with a 30AMP 2 Pole GFCI on my main panel. This breaker services my pool equipment - which are mostly 240 but also have some 120 lights and misc equip. I noticed that the 2 hot conductors are either #8 or #10 copper but the neutral (white) is #12. Is this normal? Is there a chance that it can overheat? Can it effect the voltage since the drop is about 100 feet? If necessary what can be done to remedy the situation other than pulling a new neutral conductor?


2017 / 2014 NEC & Related Books and Study Guides

#84459 - 04/02/03 09:51 AM Re: Undersized neutral????  
GEO  Offline
Member
Joined: Mar 2003
Posts: 47
Lancaster,Pa
is it a main or branch(feeding 1 piece of equipment)breaker? GEO


#84460 - 04/02/03 09:54 AM Re: Undersized neutral????  
electure  Offline


Member
Joined: Dec 2000
Posts: 4,259
Fullerton, CA USA
I commend you for installing the GFI, but without further information about your equipment, none of us can safely make a call on this.
I'd suggest you hire a qualified, licensed electrician to check this out for you.


#84461 - 04/02/03 04:06 PM Re: Undersized neutral????  
nykr95  Offline
Junior Member
Joined: Apr 2003
Posts: 2
My friend who is a licensed electrician will be coming out this weekend to look at it. I also checked the voltages at the pool pump - and found it is 175V - while it is 240V at the Main panel. Isn't that an awful high voltage drop? Its about a 100 foot run.


#84462 - 04/03/03 09:48 PM Re: Undersized neutral????  
John Steinke  Offline
Member
Joined: Apr 2001
Posts: 518
Reno,Nv., USA
It's time for a pro to look at your set-up. That is way too much voltage drop- I'm guessing that there is another problem waiting to be found. Voltage drop, under load, should not exceed 5%. A 240 v. motor should not be run at less than 204 V.
In theory, it is sometimes permissible to reduce the size of the neutral. For a 30 amp circuit, however, you are required to use a full-size (#10) neutral. Also, the use of different size wires is likely to cause GFI problems.



Member Spotlight
NickD
NickD
Amish Country, PA
Posts: 46
Joined: March 2013
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.012s Queries: 14 (0.003s) Memory: 0.7675 MB (Peak: 0.9061 MB) Zlib enabled. Server Time: 2017-04-27 20:39:49 UTC