Posted by zuhnc on August 23, 2021 at 15:53:54 from (174.234.136.250):
In Reply to: Stand-by genset posted by DannyE on August 22, 2021 at 08:52:24:
The 20KW Kohler is a good unit, and will serve you well. It should handle the whole house, unless you have electric heat and no heat pump. Those elements suck a lot of power.
Ensure that there is a MAIN fuse/breaker between the meter and the transfer switch, if you are switching the whole house. NEC also requires the transfer switch be of the same capacity as the commercial feed into the panel; i.e, if you have a 200A main panel that is fed from the meter, then the ATS MUST be 200A as well.
If the ATS is service-entrance rated, it should have the main disconnect fuse/breaker built in.
If you have a sub-panel, fed through the ATS from the main panel, then most of these requirements don't apply, but it sounds as if you are switching the whole house.
If you go to the Kohler generator section on SmokStak (TM), you will get more information than you want about Kohler standby generators; lots of experience there.
Typically, permanently home standby sets are NOT a separately derived source and do not switch the neutral; cost of the ATS is about double that of a standard unit. But, your local codes and AHJ will have the final say on that. zuhnc
This post was edited by zuhnc on 08/23/2021 at 03:58 pm.
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