ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Recent Posts
600 KW 120/208 3 Phase Y protection
by Yooperup. 07/24/17 12:20 PM
1913 American Electrician's Handbook
by gfretwell. 07/20/17 01:08 PM
Green House wiring
by ghost307. 07/20/17 09:10 AM
Permit Snafus...AHJs and Contractors Jump in
by HotLine1. 07/18/17 08:06 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
239,333 Are you busy
174,803 Re: Forum
167,182 Need opinion
Who's Online Now
0 registered members (), 54 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#16462 - 11/11/02 11:01 PM Portable generator hookup  
Electricmanscott  Offline
Member
Joined: Jan 2002
Posts: 1,457
Holden, MA USA
I have a customer that would like a manual generator setup. I planned to use one of the "Gen Tran" tranfer switch setups with six circuits. The problem is the generator receptacle is a 20A 250V three wire twistlock. The panel takes a 4 wire. I thought I'd throw this out to the vast knowledge base here and see what comes up.


Work Gear for Electricians and the Trades

#16463 - 11/12/02 07:31 AM Re: Portable generator hookup  
Trainwire  Offline
Member
Joined: Mar 2002
Posts: 360
Strasburg,PA,USA
I don't know if what I did is legal or not, but I ran a four wire cord from the transfer switch back to the generator and put a three conductor plug on the generator end, and ran the green conductor out the cord grip and put a ring terminal on the end, and a stud and wing nut on the generator frame. The bigger generators have four wire outlets.

TW


#16464 - 11/12/02 12:30 PM Re: Portable generator hookup  
caselec  Offline
Member
Joined: Apr 2002
Posts: 558
San Jose, CA
TW - I think his problem is that there isn't a neutral at this receptacle only 2 hots and a ground.

If that is the case I think the homeowner needs to go shopping for a different generator. I have seen many of the cheap ones that have a 20A - 250V receptacle and a 30A - 125V receptacle but not any 4 wire receptacles. Unfortunately most of the pre-built transfer switches like the one you are describing need a 4-wire connection. If the generator does have the 30A - 125V receptacle you could build your own transfer switch out of a small load center using 2 main breakers with an interlock but if you are feeding multi wire circuits this would not be a good idea. Another option is try to find a cheap auto XMFR and use this to create the needed 4th wire.

Curt

[This message has been edited by caselec (edited 11-12-2002).]


Curt Swartz


Member Spotlight
waymag
waymag
dallas, texas, USA
Posts: 67
Joined: January 2002
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: 0.010s Queries: 14 (0.003s) Memory: 0.7519 MB (Peak: 0.8756 MB) Zlib enabled. Server Time: 2017-07-26 00:49:16 UTC