need help understanding backup power switching options

Reply

  #1  
Old 07-14-05, 10:32 AM
Member
Thread Starter
Join Date: Nov 2004
Location: xxx
Posts: 310
need help understanding backup power switching options

Need some help sorting through a couple of options I'm told I have for a home backup electrical genset.

Seems there's two ways the genset is supplied/configured. One is with an auto transfer switch. The other is a 2 pole switch.

As best as I can figure out, what it really means is that with one of these (I think it's the 2 pole switch), my genset will feed in at the service meter. And, if I opt for the transfer switch, the genset will feed in at a sub-panel I'll have to have an electrician bring out of the main panel.

If I've got all that straight, what does it really matter to me which scheme I opt for?

Seems like with the 2 pole switch, the only thing different would be in the event of a power failure, I'd have to go out and switch the house from utility power over to the genset, whereas with feeding a sub-panel, the switching would take place automatically, and that would be about the only difference I'd see.

Probably need a little help here in clearing things up.
 
Sponsored Links
  #2  
Old 07-14-05, 02:06 PM
Speedy Petey's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Nov 2003
Posts: 2,455
It's not two pole switch, it's double throw switch. Semantics, but important.

You are correct. Basically you are describing a manual transfer swtich and an automatic transfer swtich.
The difference....$$$$.

These types of switches are for larger gensets, like ~8-10kw and up.
It is highly frowned upon to use a smaller unit with a whole house tranfer switch.

In cases of smaller gensets a transfer panel is a better option. Like those offered by Gen-Tran or Reliant.

For larger units there is also the option of a main breaker interlock. These use a metal interlock to prevent a back feed breaker from being turned simultaneously with the main breaker.
 
  #3  
Old 07-14-05, 07:23 PM
HandyRon's Avatar
Member
Join Date: Dec 2001
Location: New York
Posts: 1,365
Pete has good info.
Your choices need to be:
auto or manual
whole house or some circuits

These two answers will help direct the solution.
 
  #4  
Old 07-15-05, 11:56 PM
Member
Thread Starter
Join Date: Nov 2004
Location: xxx
Posts: 310
Thanks. Now I think I've got it. Good info.
 
Reply

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


Thread Tools
Search this Thread
Display Modes
'