Source voltage 240v motor rated straight 208v

AC\DC

Senior Member
Location
Florence,Oregon,Lane
Occupation
EC
Looking at ansul system(will have other question related to this in another post) and motor states 208v it’s not dual rated.

was reading a couple forms this one stuck out https://forums.mikeholt.com/threads/240-feeding-208-volt-motors.122880/
Seems like it will work but violation of manufacturing listing.
seems my only option is a transformer correct? Am I missing something

sorce voltage is 123/246 single phase

With +/- 10% gets motor up to 228volt.
 

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texie

Senior Member
Location
Fort Collins, Colorado
Occupation
Electrician, Contractor, Inspector
Since this is a packaged piece of equipment there may be more than the motor involved such as a control transformer or other items that may be only 208 volt. Also since it is listed as a package for 208 volt there may be an AHJ issue with 240 volt supply.
 

AC\DC

Senior Member
Location
Florence,Oregon,Lane
Occupation
EC
Have not made it over. Here the wiring diagram and it does have a transformer to control damper,
Sorry for sideways pic don’t know how to turn them on phone
 

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Jraef

Moderator
Staff member
Location
San Francisco Bay Area, CA, USA
Occupation
Electrical Engineer
Yeah, with that damper motor, you would end up almost 130V on it if you feed it with 240. I would put a buck-boost transformer on it, drop it down to closer to 208V.
 
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