igoratmikeholt
Member
hi. a space in the building is used for a new restaurant. an electrical room for this space has an existing 400a,120-208v, 3ph, 4w service. total building service is 2,800a.
guided by article 220.88 nec 2011, i put together all restaurant equipment including dishwashers, coffee makers, toasters, refrigerators, freezers, refrigration racks, ventilation equipment, air conditioning equipment, computers, projectors, loundry, compactor, lighting, outlets. it came out to be 279.6kw. using table 220.88 and
201-325kw option i reduced it to 239.8kw, which comes out to be 666a and thus the service to be 800a.
i am trying to get a calculated value of the current that the rms clamp would read on each phase should the restaurant is operating at full load.
can the sum of panel schedules loads and loads from equipment on separate swithces be used as grounds for the service for this new restaurant.
an electrical room can accomodate the upgrade to 600a by putting 600a ct and 600a switch, not 800a. for 800a we need additional room.
thank you, igor
guided by article 220.88 nec 2011, i put together all restaurant equipment including dishwashers, coffee makers, toasters, refrigerators, freezers, refrigration racks, ventilation equipment, air conditioning equipment, computers, projectors, loundry, compactor, lighting, outlets. it came out to be 279.6kw. using table 220.88 and
201-325kw option i reduced it to 239.8kw, which comes out to be 666a and thus the service to be 800a.
i am trying to get a calculated value of the current that the rms clamp would read on each phase should the restaurant is operating at full load.
can the sum of panel schedules loads and loads from equipment on separate swithces be used as grounds for the service for this new restaurant.
an electrical room can accomodate the upgrade to 600a by putting 600a ct and 600a switch, not 800a. for 800a we need additional room.
thank you, igor