ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Motion detectors and dimmers
by gfretwell. 09/20/18 04:02 PM
Extension cords
by annemarie1. 09/20/18 08:54 AM
Inspection camera help
by Bill Addiss. 09/19/18 10:50 PM
220/230/240V 60Hz Systems
by gfretwell. 09/16/18 12:37 PM
Acronis Backup 2017
by gfretwell. 09/16/18 12:46 AM
New in the Gallery:
Plug terminals
Housebilding DIY wiring
Who's Online Now
1 registered members (geoff in UK), 28 guests, and 24 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Generator ground or lack thereof. #127869
02/20/02 05:21 PM
02/20/02 05:21 PM
C
CandCTech  Offline OP
Junior Member
Joined: Jun 2001
Posts: 3
Clinton, Ma. USA
I installed a Gentran swith in a house the other day and I checked out the generator (Generac 4000w), when I checked it I found the voltage from the hot leg to ground was 0 zip nada.... I tried to call Generac, and got a local sales rep who knew jack about it. I had a similar problem with a Honda generator (hot to ground was 65volts) and when I called them they said that was normal for that model.
Ok, so when these generator's are being used as a back up power source in a dwelling doesn't it become a seperatly derived system? And shouldn't the neutral be bonded to the ground in the generator?
I would appreciate anybodys input. Thanks in advance.

Tools for Electricians:
Re: Generator ground or lack thereof. #127870
02/22/02 03:09 PM
02/22/02 03:09 PM
B
Bob  Offline
Member
Joined: Feb 2002
Posts: 182
Mobile, AL, USA
The generator only becomes a separately derived system if the transfer switch transfers the neutral (breaks the neutral). If that is the case then you must connect the neutral to the frame of the generator with the bonding strap. You will also need to install a grounding electrode. If the neutral is not transfered then the bonding strap must be removed and the neutral conductor is connected to the neutral terminal on the generator. The green grounding conductor from the house wiring is connected to the frame of the motor. In your case where you did not get a reading from the hot leg to ground may have been because the ground strap was not in place. I hope you got a reading from hotleg to neutral.


Featured:

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

 

Member Spotlight
MarkC10
MarkC10
CA, Inland Empire
Posts: 43
Joined: September 2013
Show All Member Profiles 
Top Posters(30 Days)
Admin 13
Trumpy 11
Popular Topics(Views)
249,372 Are you busy
187,301 Re: Forum
176,647 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.022s Queries: 14 (0.005s) Memory: 0.9427 MB (Peak: 1.0588 MB) Zlib enabled. Server Time: 2018-09-22 11:06:13 UTC