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#98455 - 12/14/04 10:28 AM NEC deletes all references to a Design E motor!
Joe Tedesco Offline
Member

Registered: 10/07/00
Posts: 3325
Loc: Boston, Massachusetts USA
The 2005 NEC has finally deleted all references to a Design E motor.

If I buy a high efficiency motor required by the model energy codes, (ASHRAE 90.1) what design series will I expect to get?
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Joe Tedesco, NEC Consultant

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#98456 - 12/14/04 10:40 AM Re: NEC deletes all references to a Design E motor!
resqcapt19 Offline
Member

Registered: 11/10/00
Posts: 2209
Loc: IL
Joe,
The Design E motor was deleted from the NEC because they never existed. They were planned but none were ever made.
Don
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#98457 - 12/14/04 11:04 AM Re: NEC deletes all references to a Design E motor!
Joe Tedesco Offline
Member

Registered: 10/07/00
Posts: 3325
Loc: Boston, Massachusetts USA
Don

Thanks. I was aware of that. Are any energy efficient motors available?
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#98458 - 12/14/04 06:30 PM Re: NEC deletes all references to a Design E motor!
resqcapt19 Offline
Member

Registered: 11/10/00
Posts: 2209
Loc: IL
I believe all of the manufacturer's have "premium" efficiency motors that meet the energy standards. I think that the normal motor is about 90 to 92% efficient and the "premiums" can be about 95%. It doesn't sound like much, but over the life of the motor it can make a big difference in energy costs. Of the total cost of a motor over its life, about 97% is the energy cost to operate the motor.
Don
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Don(resqcapt19)

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