DIY Home Improvement Forum banner
1 - 3 of 3 Posts

· Registered
Joined
·
23 Posts
Discussion Starter · #1 ·
Currently the garage has a deul 40 amp breaker, 10-3 w/g to a 20 amp 230v socket. Its a dedicated line.

The compressor is a 230v, 15a, 3750 rpm unit.

Is the current system an acceptable set up? I was wondering if the 40 amp breaker was too big?
 

· Electrical Contractor
Joined
·
3,370 Posts
What does the nameplate information say on the motor? Is the "HP" rating missing?

In certain instances, you are allowed to have a 40 Amp breaker on such a circuit.

If the full-load current in Amps is 15, then you are allowed to upsize the breaker 250%.

That being said, the max overcurrent protection would be 15x2.5=37.5 Amps. Upsizing to next common size breaker = 40 Amps.
 

· Registered
Joined
·
23 Posts
Discussion Starter · #3 ·
What does the nameplate information say on the motor? Is the "HP" rating missing?

In certain instances, you are allowed to have a 40 Amp breaker on such a circuit.

If the full-load current in Amps is 15, then you are allowed to upsize the breaker 250%.

That being said, the max overcurrent protection would be 15x2.5=37.5 Amps. Upsizing to next common size breaker = 40 Amps.
Yes the HP is missing and all the other info I got from the label is what I posted. Thanks it sounds like I'm in good shape.
 
1 - 3 of 3 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top