230 V Motor Wiring Check

Reply

  #1  
Old 01-24-16, 11:46 AM
Member
Thread Starter
Join Date: Jan 2016
Location: United States
Posts: 4
230 V Motor Wiring Check

Wiring a another 230v motor, 5 HP, 20.6 Amps, 1.15 Service Factor is 23.7 FLA, So 5500 watts max with a magnetic starter/overload protector.

Im thinking a run distance of only 15 feet means #8 copper wire and a 40 amp double pole breaker. Does this sound right or is the breaker/wire not strong enough to handle the motors potential start up amperage which Im told may be 3 times higher than the FLA but only for a few seconds.
 
Sponsored Links
  #2  
Old 01-24-16, 11:55 AM
ray2047's Avatar
Group Moderator
Join Date: Mar 2006
Location: USA
Posts: 33,053
Actually #10 on a 30amp breaker. The start up current is only momentary and the breakers are "slow" trip to handle motor start up.
 
  #3  
Old 01-25-16, 12:23 PM
CasualJoe's Avatar
Member
Join Date: Jan 2010
Location: USA
Posts: 9,391
The Schneider Electric calculator I frequently use says #10 wire and up to a 60 amp breaker. I think I'd start with a 40 amp breaker and try it from there. I am just assuming this is a single phase motor.

Single Phase Motor Data
 
  #4  
Old 01-25-16, 12:25 PM
Forum Topic Moderator
Join Date: Feb 2005
Location: Near Lansing, Michigan
Posts: 10,515
Yes Ray mentioned the #10 wire is the minimum size wire required and 30A would be smallest breaker you should try. Code will allow up to a 60A breaker for that motor, but you need to follow a test procedure with smaller breaker sizes to see what is the smallest sized breaker that will allow the motor to start without tripping.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes