Elevator Motor - Full Load vs. Rated Load

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Keri_WW

Keri_WW

Senior Member
T-K sent me a spec on an a 20HP elevator (208/3) with the following information:

Total (Full Load Motor) A.C. Amps = 95 A
Rated A.C. Amps = 65.1 A
Starting A.C. Amps = 195 A.

What is the technical difference between the total (full load) amps and the rated amps as far as an elevator is concerned? I am planning on sizing my breaker at 175% of the rated amps (125A CB).

Thanks,
Keri :):)
 
T

texie

Senior Member
Location
Fort Collins, Colorado
Occupation
Electrician, Contractor, Inspector
Keri_WW said:
T-K sent me a spec on an a 20HP elevator (208/3) with the following information:

Total (Full Load Motor) A.C. Amps = 95 A
Rated A.C. Amps = 65.1 A
Starting A.C. Amps = 195 A.

What is the technical difference between the total (full load) amps and the rated amps as far as an elevator is concerned? I am planning on sizing my breaker at 175% of the rated amps (125A CB).

Thanks,
Keri :):)
Click to expand...

Because this is an elevator the motor is rated for duty cycle service. The conductors have to be rated for the 95 amps. See 620.13 and 430.22(E).
 
Besoeker

Besoeker

Senior Member
Location
UK
Keri_WW said:
T-K sent me a spec on an a 20HP elevator (208/3) with the following information:

Total (Full Load Motor) A.C. Amps = 95 A
Rated A.C. Amps = 65.1 A
Starting A.C. Amps = 195 A.

What is the technical difference between the total (full load) amps and the rated amps as far as an elevator is concerned? I am planning on sizing my breaker at 175% of the rated amps (125A CB).

Thanks,
Keri :):)
Click to expand...
Intermittent duty rating would be my guess.
 
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