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cabobravo

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what is the amp load for a 20000sq. ft. classroomarea,a 4000 sq. ft. auditorium area and 1000 sq. ft. assembly hall area with a 277/480 volt three phase service and following loads (lighting supplied by 277 volts) 120V,single phase loads. 170 receptacles (noncontinous duty) 40 receptacles (continous duty) 80ft. multi-outlet assembly (heavy duty)
 
Have you tried to calculate this yourself?

This sounds like a study question and it's missing some pertainent info to actually come up with an answer, there must be some AC / heat

Use article 220 and see what you come up with.

Roger
 
cabobravo said:
what is the amp load for a 20000sq. ft. classroomarea,a 4000 sq. ft. auditorium area and 1000 sq. ft. assembly hall area with a 277/480 volt three phase service and following loads (lighting supplied by 277 volts) 120V,single phase loads. 170 receptacles (noncontinous duty) 40 receptacles (continous duty) 80ft. multi-outlet assembly (heavy duty)

Hold on while I get right on that...
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What is "40 receptacles continuous duty" and how much continuous load?
What is the actual lighting load?
What is a "heavy-duty" multi-outlet assembly?

If this is an exam or homework question, you must have forgotten a good deal of the question.

If this is an actual project you will need MUCH more information before coming up with any meaningful load figures...
 
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