|
|
|
0 members (),
528
guests, and
19
robots. |
|
Key:
Admin,
Global Mod,
Mod
|
|
|
|
Joined: Mar 2003
Posts: 849
OP
Member
|
Why isn't there an Amperage chart on theses motors in the code book???
430.248 just goes up to 230 volts???
|
|
|
|
|
Joined: Aug 2007
Posts: 853
Member
|
Personally,I have never seen a 277V motor.
So I never gave it a thought.
|
|
|
|
|
Joined: Apr 2002
Posts: 7,413 Likes: 8
Member
|
Ditto on Leland's comment.
You could always refer to the motor nameplate, right?
John
|
|
|
|
|
Joined: Mar 2003
Posts: 849
OP
Member
|
Per 430.6 (A)1 all amperages except for overloads & few exceptions are to come out of tables in Code book.
Since no Table with 277V I guess well have to use Nameplate for all calculations??
And yep theres 277Volt Motors Goggle um there there. These are on a Heat Pump System.
|
|
|
|
|
Joined: Aug 2007
Posts: 853
Member
|
I've seen those and other type units. Also in them was a transformer to step down.
Google was the first thing I did. Always nice to find something new.
|
|
|
|
|
Joined: Mar 2003
Posts: 849
OP
Member
|
Been in the trade almost 45 years have Never before this time ever Seen or Knew there were 277 volt mtrs. Guess never to late to learn right.
|
|
|
|
|
Joined: Apr 2002
Posts: 7,413 Likes: 8
Member
|
It's never to late, & we're never to old to learn. We come here to do that, right???
Yes, as there is no table to use, go to 110.3 (B) and use the nameplate.
John
|
|
|
|
|
Joined: Feb 2003
Posts: 939
Member
|
There is not a large number of 277 volt motour in use however most common found in HVAC or large electric unit heater AKA electric Renzor heater.
Once a while will find them on the exhaust fan when they are tied to bathroom lighting circuit { this is a grey spot to cross }
The other common place to find 277 volt motor is thru wall heatpump when they are order on 277 volt system.
Merci,Marc
Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)
|
|
|
|
Posts: 404
Joined: March 2007
|
|
|
|
|
|
