hhsting
Senior Member
- Location
- Glen bunie, md, us
- Occupation
- Junior plan reviewer
I have fire pump ats controller all in one with following for 50hp 208V three phase:
Isolating switch not rated for 115% of motor full load amps 172.5x1.15= 200A,
Circuit breaker continous rating not less than 115% of full load amps = 200A.
Instantenous trip setting of not more than 20 times the motor full load current.
Unit provided with locked rotor current orotectio shunt trip device factory set at 600% at 1000A.
Device not field adjustable.
The controller is UL listed UL 218 and ATS is UL 1008.
Does above comply nec 2014 Article 695.4(B)(2)?
Isolating switch not rated for 115% of motor full load amps 172.5x1.15= 200A,
Circuit breaker continous rating not less than 115% of full load amps = 200A.
Instantenous trip setting of not more than 20 times the motor full load current.
Unit provided with locked rotor current orotectio shunt trip device factory set at 600% at 1000A.
Device not field adjustable.
The controller is UL listed UL 218 and ATS is UL 1008.
Does above comply nec 2014 Article 695.4(B)(2)?
Last edited:
