Genny Q

[romex jockey]

Do you fellas see any issue in introducing a 240/120 generator for critical loads into a 208/120 3ph system for single phase items?

thx

~RJ~

 

[mbrooke]

What type of critical loads? If you mean life safety loads the generator must comply with NFPA 110 Level 1- an air cooled residential Generac won't be acceptable.

 

[romex jockey]

What type of critical loads? If you mean life safety loads the generator must comply with NFPA 110 Level 1- an air cooled residential Generac won't be acceptable.

hmmm, never considered that mbrooke..... this is a public building , a 'family center' where used goods and food is parsed out , guess i've some reading to do? ~RJ~

 

[mbrooke]

hmmm, never considered that mbrooke..... this is a public building , a 'family center' where used goods and food is parsed out , guess i've some reading to do? ~RJ~

Is the load life safety, legally required or optional? Article 700...

What exactly do they want on standby power? Code lets you size a genny based on actual electric bills.

 

[augie47]

If there are any 208v loads that would be supplied by the generator, a 240v source would be in violation of
NEC 110.4

 

[hillbilly1]

If using an automatic transfer switch, it may see the 208 as under voltage, and want to stay on generator. Did one like that about 20 years ago for a refrigerated wine storage room, everything was 120, so no load voltage issues. Dedicated single phase panel. Genercrap generator and transfer switch. Worked fine on that installation.

 

[GoldDigger]

hmmm, never considered that mbrooke..... this is a public building , a 'family center' where used goods and food is parsed out , guess i've some reading to do? ~RJ~

It sounds as if the most significant load may be refrigeration if they do not to actually do distribution while power is off.