Need help with this calculation

[schicco]

I am a bit confused with this;

Service is 277/480V 3 phase.
The question says; what is the ampacity of a cable supplying a lighting load (Lighting is supplied by 277V).
Lighting Panel "LP" is a 3 phase panel.
Total Lighting load is 65000VA

Do I start with this;
I = 65000
480x1.73

OR is it
I = 65000
277x1.73

of cause I will then use the 125%

 

[beanland]

831

831

65000VA / (3 * 277) = Load Amps

BTW: 3 * 377 = 480 * 1.732 = 831

 

[beanland]

831

831

65000VA / (3 * 277) = Load Amps

BTW: 3 * 277 = 480 * 1.732 = 831

 

[schicco]

65000VA / (3 * 277) = Load Amps

BTW: 3 * 277 = 480 * 1.732 = 831

Thank you so much

 

[jumper]

Service is 277/480V 3 phase.
The question says; what is the ampacity of a cable supplying a lighting load (Lighting is supplied by 277V).

Just curious. Is this the exact wording of the question?