2017 National Electrical Code Informative Annex D Examples Example D4(a) Multifamily Dwelling The general lighting load for each unit is 2520 VA.

## A dwelling has: 1500 sq. ft. of floor space, not considering an unfinished attic, unfinished cellar not adaptable for future use and open porches; six 7-A, 230-V room air-conditioning units, two 4-kW wall-mounted ovens, two 20-A small appliance circuits, one 5-kW combination clothes washer and dryer, one 5.1 kW counter-mounted cooking unit, a 4.5 kW water heater, a 1.2 kW dishwasher, a 1.5-kW permanently installed bathroom space heater, and one 20-A laundry circuit. Assume: combination clothes washer and dryer, counter-mounted cooking unit, dishwasher, wall-mounted ovens, and water heater kW ratings equivalent to kVA. Assume: the 5.1-kVA counter-mounted cooking unit is supplied by one branch circuit, and the two 4-kVA wall-mounted ovens are supplied by a separate circuit. What is the total required minimum service rating and the total calculated load for the service in VA?

2017 National Electrical Code Informative Annex D. Example D2(b) One-Family Dwelling The total calculated load in VA is 29,200 VA, and the minimum required service rating is 122 A.

## A dwelling has floor area of 1500 sq. ft., excluding an unfinished attic, unfinished cellar not adaptable for future use, and open porches. There are six 7-A, 230-V room air-conditioning units, two 4-kW wall-mounted ovens, two 20-A small appliance circuits, one 5.1-kW counter-mounted cooking unit, a 5-kW combination clothes washer and dryer, a 4.5-kW water heater, a 1.5-kW permanently installed bathroom space heater, a 1.2-kW dishwasher, and one 20-A laundry circuit. If we assume a counter-mounted cooking unit, wall-mounted ovens, dishwasher, combination clothes washer and dryer, and water heater kW ratings equivalent to kVA, what is the total amperes of the air conditioner load?

2017 National Electrical Code Informative Annex D Examples Example D2(b) Optional Calculation for One-Family Dwelling, Air Conditioning Larger Than Heating [see 220.82(A) and 220.82(C)] The total of the air conditioner…

## If a dwelling has a 2000 sq. ft. floor area, not counting an unfinished attic, unfinished cellar not adaptable for future use, and open porches, a 12-kW range, a 5-kW clothes dryer, a 4.5-kW water heater, a 2-1/2 ton (24-A) heat pump with 15 kW of backup heat, and a 1.2-kW dishwasher, what are the VA units for the total heating and cooling load?

2017 National Electrical Code Informative Annex D. Example D2(c) Optional Calculation for One-Family Dwelling with Heat Pump (Single-Phase, 240/120-Volt Service) The total heating and cooling load is 15,510 VA…

## For a 3000 sq. ft. store with 30 ft. of show window, with a total of 80 duplex receptacles, what is the total calculated general lighting load in VA if the service is 120/240 V, single-phase wire service, and the actual connected lighting load is 8500 VA?

2017 National Electrical Code Informative Annex D. Example D3 Store Building The total calculated general lighting load is 9000 VA.

## If a 3000 sq. ft. store has 30 ft. of show window, a total of 80 duplex receptacles, service of 120/240 V, single phase 3-wire, and actual connected lighting load of 8500 VA, what is the total calculated lighting load for the show windows in VA?

2017 National Electrical Code Informative Annex D Examples Example D3 Store Building The total calculated lighting load for the show windows is 6000 VA.

## When a dwelling has a 1500 sq. ft. floor area, an unfinished attic, an unfinished cellar not adaptable for future use, and open porches. It has a 12-kW range and a 5.5 kW, 240-V dryer for appliances. Assume kW ratings for both are equivalent to kVA ratings in accordance with Article 220.54 and 220.55. What is the minimum required service size in amperes, assuming the dwelling is fed by a 120/240-V 3-wire, single-phase service?

2017 National Electrical Code Informative Annex D. Example D1(a) One-Family Dwelling General Lighting (see 220.12) 4,500 VA Small Appliance (see 220.52(A)) 3,000 VA Laundry (see 220.52(B)) 1,500 VA Total General…

## When a dwelling has 1500 sq. ft. of floor area, excluding an unfinished attic, unfinished cellar not adaptable for future use, and open porches; six 7-A, 230-V room air-conditioning units, two 4-kW wall-mounted ovens, two 20-A small appliance circuits, one 5.1-kW counter-mounted cooking unit, one 5-kW combination clothes washer and dryer, one 4.5-kW water heater, one 1.5-kW permanently installed bathroom space heater, one 1.2-kW dishwasher, and one 20-A laundry circuit, and we assume wall-mounted ovens, counter-mounted cooking unit, water heater, dishwasher, and combination clothes washer and dryer kW ratings equivalent to kVA. If we assume the dwelling is fed by a 120/240-V, 3-wire, single-phase service, what is the minimum required service rating and the total calculated load in VA required?

2017 National Electrical Code Informative Annex D. Example D2(b) One-Family Dwelling The total calculated load in VA is 29,200 VA, and the minimum required service rating is 122 A.

## A 3000 sq. ft. store has 80 duplex receptacles and 30 ft. of show windows. Service is single phase 3-wire, 120/240 V, and actual connected lighting load is 8500 VA. The total calculated receptacle load in VA is:

2017 National Electrical Code Informative Annex D Examples Example D3 Store Buildings The total calculated receptacle load is 12,200 VA.

## For a 40 unit multi-family dwelling unit, with meters in two banks of 20 each and individual meters to each dwelling unit, could you use 2 15A circuits to handle the general lighting load? Half (20) of the dwelling units have electric ranges up to 12 kW each. Assume range kW rating the same as kVA rating in accordance with Article 220.55. Each dwelling unit has 840 sq. ft. of space. Laundry facilities are on premises and available to all tenants. The other half of the ranges are gas.

2017 National Electrical Code Informative Annex D. Example D4(a) Multifamily Dwelling You could use 2 15A circuits to handle the general lighting load.