Overload setting 430.6 A (1) question

[thewire]

So I am given this 3 phase AC squirrel cage motor with nameplate data as

power: 25 hp
service factor: 1
temperture rise: 60C
full load rating: 68A
voltage 230V
Locked rotor: D

Which overload setting should I used?

I thought based on the 430.6 A (1) exception 3 stated if both hp and full load rating are given, we should use the nameplate rating instead right?

 

[david luchini]

So I am given this 3 phase AC squirrel cage motor with nameplate data as

power: 25 hp
service factor: 1
temperture rise: 60C
full load rating: 68A
voltage 230V
Locked rotor: D

Which overload setting should I used?

I thought based on the 430.6 A (1) exception 3 stated if both hp and full load rating are given, we should use the nameplate rating instead right?

430.6(A)(1) ex 3 deals with "listed motor-operated appliances," not motors in general.

I think 430.6(A)(2) tells you what you are looking for with regards to overload protection.

(In this case, it looks like the table full load current and the nameplate full load current are the same.)

 

[xformer]

So I am given this 3 phase AC squirrel cage motor with nameplate data as

power: 25 hp
service factor: 1
temperture rise: 60C
full load rating: 68A
voltage 230V
Locked rotor: D

Which overload setting should I used?

I thought based on the 430.6 A (1) exception 3 stated if both hp and full load rating are given, we should use the nameplate rating instead right?

I would look at 430.32

 

[thewire]

430.6(A)(1) ex 3 deals with "listed motor-operated appliances," not motors in general.

I think 430.6(A)(2) tells you what you are looking for with regards to overload protection.

(In this case, it looks like the table full load current and the nameplate full load current are the same.)

ah...that is confusing...listed motor operated appliances..