hhsting
Senior Member
- Location
- Glen bunie, md, us
- Occupation
- Junior plan reviewer
I have the following in commercial restaurant:
1. Duct heater 208V three phase 4.32kva full load amps of 12A
2. Exhaust fan on light circuit 120V single phase, 0.8kva total fan and light full load amps of 8.3A
3. Make Air Unit (MAU) 120V single phase 0.47 kva full loads 3.91A
4. Recirculating pump 120V single phase 0.4 kva full load amps of 3.5A.
All four items above the branch circuit breaker size provided is 20A. When asked even if you do 125% for heater or 225% for motor amps come out be equal to or less than 15A. Next standard rating would be 15A not 20A. However was told that commercial don’t use 15A breaker only in residential application.
I don’t see this in code.
Questions:
1. Should items branch breaker size be 15A or 20A?
2. Is their anywhere in code commercial application 20A is minimum breaker size and 15A is minimum breaker size for residential dwelling units?
1. Duct heater 208V three phase 4.32kva full load amps of 12A
2. Exhaust fan on light circuit 120V single phase, 0.8kva total fan and light full load amps of 8.3A
3. Make Air Unit (MAU) 120V single phase 0.47 kva full loads 3.91A
4. Recirculating pump 120V single phase 0.4 kva full load amps of 3.5A.
All four items above the branch circuit breaker size provided is 20A. When asked even if you do 125% for heater or 225% for motor amps come out be equal to or less than 15A. Next standard rating would be 15A not 20A. However was told that commercial don’t use 15A breaker only in residential application.
I don’t see this in code.
Questions:
1. Should items branch breaker size be 15A or 20A?
2. Is their anywhere in code commercial application 20A is minimum breaker size and 15A is minimum breaker size for residential dwelling units?