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Thursday, December 17, 1998
Question:
I'm installing a multioutlet assembly along the back of a workbench of an electronics lab, this strip is 12 feet long and has receptacles spaced 3 inches apart. How many VA would you calculate for this strip, if you expect a number of pieces of equipment to be used at the same time? I think it should be 8640 VA (180 VA per receptacle, right?) but my lead says it is only about 1/4 of that, who is right?
A
Answer:
Your lead person is correct, the load is calculated at 2160 volt amperes. Section 220-3(c) exc. 1 applies and requires each foot in length to be considered at 180 volt amperes. Therefore, 12 times 180 equals 2160 volt amperes.