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NEC deletes all references to a Design E motor! #98455
12/14/04 02:28 PM
12/14/04 02:28 PM
Joe Tedesco  Offline OP
Member
Joined: Oct 2000
Posts: 2,749
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?


Joe Tedesco, NEC Consultant
2017 / 2014 NEC & Related Books and Study Guides
Re: NEC deletes all references to a Design E motor! #98456
12/14/04 02:40 PM
12/14/04 02:40 PM
R
resqcapt19  Offline
Member
Joined: Nov 2000
Posts: 2,148
IL
Joe,
The Design E motor was deleted from the NEC because they never existed. They were planned but none were ever made.
Don


Don(resqcapt19)
Re: NEC deletes all references to a Design E motor! #98457
12/14/04 03:04 PM
12/14/04 03:04 PM
Joe Tedesco  Offline OP
Member
Joined: Oct 2000
Posts: 2,749
Boston, Massachusetts USA
Don

Thanks. I was aware of that. Are any energy efficient motors available?


Joe Tedesco, NEC Consultant
Re: NEC deletes all references to a Design E motor! #98458
12/14/04 10:30 PM
12/14/04 10:30 PM
R
resqcapt19  Offline
Member
Joined: Nov 2000
Posts: 2,148
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


Don(resqcapt19)

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