Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 09-28-2011, 11:22 AM   #1
Just call me Andrew
 
Join Date: Mar 2009
Location: Albany, NY
Posts: 2,252
Share |
Default

Backfeeding with a portable generator


A friend of mine has routine power outages and would like to get his generator fed into the panel...I plan to help.

Is it as simple as putting an inlet receptacle of the proper rating on the outside of the house, feeding that receptacle to the appropriate breaker size and location on the main panel, and installing an interlock kit?

Can you backfeed into the main panel (and he would have to be cautious of which items or breakers he turns on during an outage) or must it be to a subpanel?

Thanks.

__________________
Andrew

secutanudu is offline   Reply With Quote
Old 09-28-2011, 11:26 AM   #2
Member
 
Join Date: Jun 2007
Posts: 3,503
Default

Backfeeding with a portable generator


It must be the main panel. Otherwise you would need two (2) interlock kits. And how would the second kit be safely used each time the generator is used? So feed the main panel only. Then he can feed the sub with generator power.

I like to suggest an ATS for this application.

J. V. is offline   Reply With Quote
Old 09-28-2011, 11:35 AM   #3
Just call me Andrew
 
Join Date: Mar 2009
Location: Albany, NY
Posts: 2,252
Default

Backfeeding with a portable generator


Does there have to be a subpanel at all? Or can he just feed his main panel with the generator, and turn off non-critical breakers.
__________________
Andrew

secutanudu is offline   Reply With Quote
Old 09-28-2011, 12:04 PM   #4
Licensed electrician
 
Join Date: Sep 2007
Location: Maryland
Posts: 7,397
Default

Backfeeding with a portable generator


Andy, were you asking about a generator fed subpanel or a subpanel utility fed off of the main panel?
__________________
Answers based on the National Electrical Code. Local amendments may apply. Check with your local building officials.
Jim Port is offline   Reply With Quote
Old 09-28-2011, 12:15 PM   #5
Just call me Andrew
 
Join Date: Mar 2009
Location: Albany, NY
Posts: 2,252
Default

Backfeeding with a portable generator


I was asking about a generator-fed panel....but was hoping to just do it without having to add a sub.
__________________
Andrew

secutanudu is offline   Reply With Quote
Old 09-28-2011, 12:20 PM   #6
Licensed electrician
 
Join Date: Sep 2007
Location: Maryland
Posts: 7,397
Default

Backfeeding with a portable generator


Just put the interlock on the main panel.
__________________
Answers based on the National Electrical Code. Local amendments may apply. Check with your local building officials.
Jim Port is offline   Reply With Quote
Old 09-28-2011, 12:21 PM   #7
Member
 
Join Date: Sep 2011
Posts: 90
Default

Backfeeding with a portable generator


No. A sub panel is not required. Post the make and model of the main panel in question and I can suggest an appropriate interlock.
Auger01 is offline   Reply With Quote
Old 09-28-2011, 01:05 PM   #8
Just call me Andrew
 
Join Date: Mar 2009
Location: Albany, NY
Posts: 2,252
Default

Backfeeding with a portable generator


It's a 200A square-d - i forget homeline or QO, but I know it's the cheaper of the two.

I assume this is the one (the first one on the list):
http://www.interlockkit.com/squareDmain01.htm
__________________
Andrew

secutanudu is offline   Reply With Quote
Old 09-28-2011, 01:21 PM   #9
Licensed electrician
 
Join Date: Sep 2007
Location: Maryland
Posts: 7,397
Default

Backfeeding with a portable generator


Homeline has the 1" breakers and is the less expensive line.
__________________
Answers based on the National Electrical Code. Local amendments may apply. Check with your local building officials.
Jim Port is offline   Reply With Quote
Old 09-28-2011, 02:13 PM   #10
Just call me Andrew
 
Join Date: Mar 2009
Location: Albany, NY
Posts: 2,252
Default

Backfeeding with a portable generator


yup, that's the one.

Is that website the only place to get them? Guess I can check a local supply house.
__________________
Andrew

secutanudu is offline   Reply With Quote
Old 09-28-2011, 02:15 PM   #11
Licensed electrician
 
Join Date: Sep 2007
Location: Maryland
Posts: 7,397
Default

Backfeeding with a portable generator


Any supply house for Square D should be able to get the parts you need.
__________________
Answers based on the National Electrical Code. Local amendments may apply. Check with your local building officials.
Jim Port is offline   Reply With Quote
Old 09-28-2011, 02:17 PM   #12
Just call me Andrew
 
Join Date: Mar 2009
Location: Albany, NY
Posts: 2,252
Default

Backfeeding with a portable generator


I believe it's an 8000 watt generator. Safe to backfeed that with a 60A breaker? (3) #6 and (1) #10 EGC?

I just hook up the iutlet like I would any 240v outlet, right? 4 wires between the panel and the inlet?
__________________
Andrew

secutanudu is offline   Reply With Quote
Old 09-28-2011, 04:27 PM   #13
Member
 
Join Date: Sep 2011
Posts: 90
Default

Backfeeding with a portable generator


For an indoor panel use part number HOMCGK2. For an outdoor panel the part number is HOMRBGK2. They list for about 60 to 70 bucks.

Here is a link to square D interlock info:

http://members.rennlist.org/warren/SQDinterlockkit.pdf

An 8000 watt generator only puts out a maximum of 33 amps at 240 volts. I would go with a 30 amp breaker and 10 ga. wire to a L14-30 inlet. If he plans on a bigger genny later, by all means put the bigger stuff in now.

If its a vintage panel, there is a aftermaket kit that would work from interlockkit.com, but they cost around 150.00.



Auger01 is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Powering boiler with portable generator piacentini Electrical 14 01-06-2011 09:01 AM
wiring portable generator into two house panels Rage Electrical 7 12-21-2010 04:40 PM
Portable generator and Lennox furnace joshbloomberg Electrical 7 02-10-2010 10:25 PM
portable generator questions--long post daddyrabbit Electrical 19 01-27-2010 07:40 PM
Better way to protect portable generator inlet? IvoryRing Electrical 7 05-30-2006 07:30 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.