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NOTE: This is an unformatted excerpt from our online fire protection training library.

Load Calculations

Demand Factors

Receptacles not in Dwellings

For receptacle loads in locations other than dwellings, according to Section 220.44, receptacle loads calculated on a per-receptacle basis can be added up and demand factors applied from either Table 220.42 or Table 220.44.

For example, in an office building where there is a very large area of at least 10,000 square feet with receptacle loads calculated at 1 VA per square foot (or 180 VA per 5 ft of multi-outlet assembly), a demand factor of 50 percent can be applied to the portion of the load that exceeds 10,000 VA.

Putting the receptacle load in with the lighting and applying the factors from Table 220.42 would result in no reduction in the load for an office building because most of the lighting load is considered to be continuous. The use of Table 220.44 is advantageous in this example. However, receptacle loads in dwellings and hotel/motel guest rooms and guest suites are included in the lighting load, and the demand factors in Table 220.42 can be applied to the lighting and receptacles together in the feeder or service load calculation. See 220.14(J). In other cases, such as warehouses and hospitals, the demand factors in Table 220.42 apply only to the lighting portion of the load calculation, so only Table 220.44 could be applied to receptacle loads.

NOTE: This is an unformatted excerpt from our online fire protection training library.

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