![]() ![]() If multiple sets of service-entrance conductors connect directly to a service drop, set of overhead service conductors, set of underground service conductors, or service lateral, the equivalent size of the largest service-entrance conductor shall be determined by the largest sum of the areas of the corresponding conductors of each set.The minimum total load in amperes shall be the volt-ampere sum calculated above divided by 240 volts. Sixty-five percent of nameplate rating(s) of electric space-heating units if less than four separately controlled units.įorty percent of nameplate rating(s) of electric space-heating units of four or more separately controlled units. If the heat pump compressor is prevented from operating at the same time as the supplementary heat, the compressor load does not need to be added to the supplementary heat load for the total central electric space-heating load. One-hundred percent of nameplate rating of the heat pump compressor and sixty-five percent of the supplemental electric heating load for central electric space-heating systems. Systems qualifying under this selection shall not be figured under any other category in this table. One-hundred percent of the nameplate rating of the electric thermal storage and other heating systems where the usual load is expected to be continuous at the full nameplate value. One hundred percent of the nameplate rating(s) of the heat pump where a heat pump is used without any supplemental electric heating. ![]() One-hundred percent of the nameplate rating(s) of the air-conditioning and cooling equipment. ![]() The minimum subtotal for the loads above shall be 100 percent of the first 10,000 volt-amperes of the sum of the above loads plus 40 percent of any portion of the sum that is in excess of 10,000 volt-amperes. ![]() The nameplate volt-ampere rating of all fastened-in-place, permanently connected or dedicated circuit-supplied appliances such as ranges, ovens, cooking units, clothes dryers not connected to the laundry branch circuit and water heaters.Īpply the following demand factors to the above subtotal: MINIMUM SERVICE LOAD CALCULATION LOADS AND PROCEDUREģ volt-amperes per square foot of floor area for general lighting and general use receptacle outlets.ġ,500 volt-amperes multiplied by total number of 20-ampere-rated small appliance and laundry circuits. ![]()
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