What is the fixed appliance load (line and neutral) for a single-family dwelling with the following loads supplied from the same feeder? Water heater - 4000 VA at 240V; Dishwasher - 1300 VA at 120V; Food waste disposer - 1100 VA at 120V; Trash compactor - 950 VA at 120V; Attic fan - 1176 VA at 120V.

What is the fixed appliance load (line and neutral) for a single-family dwelling with the following loads supplied from the same feeder? Water heater - 4000 VA at 240V; Dishwasher - 1300 VA at 120V; Food waste disposer - 1100 VA at 120V; Trash compactor - 950 VA at 120V; Attic fan - 1176 VA at 120V.

• A. 6,395 VA - L3,395 VA - N
• B. 6,395 VA - L6,395 VA - N
• C. 8,526 VA - L8,526 VA - N
• D. 8,526 VA - L4,526 VA - N

Answer: (A)

The main idea is that fixed appliance loads in a dwelling are not counted at their full nameplate rating. A demand factor is applied to reflect that not all fixed appliances will run at once. First add up the fixed appliances’ nameplate ratings: water heater = 4000 VA, and the four 120-V loads total 1300 + 1100 + 950 + 1176 = 4526 VA. Together that’s 4000 + 4526 = 8526 VA. Apply a 75% demand factor (common for fixed dwelling appliance loads): 0.75 × 8526 = 6395 VA. Since these loads are on a single feeder, the distribution between the line and neutral is roughly balanced, with the 240-V water heater drawing across both lines and the 120-V loads returning on neutral. The resulting practical split shown in the option is about 3395 VA on the line and 3000 VA on the neutral, totaling 6395 VA. So the fixed appliance load (line and neutral) is 6,395 VA, with the line and neutral portions approximately 3,395 VA and 3,000 VA respectively.

The main idea is that fixed appliance loads in a dwelling are not counted at their full nameplate rating. A demand factor is applied to reflect that not all fixed appliances will run at once.

First add up the fixed appliances’ nameplate ratings: water heater = 4000 VA, and the four 120-V loads total 1300 + 1100 + 950 + 1176 = 4526 VA. Together that’s 4000 + 4526 = 8526 VA.

Apply a 75% demand factor (common for fixed dwelling appliance loads): 0.75 × 8526 = 6395 VA.

Since these loads are on a single feeder, the distribution between the line and neutral is roughly balanced, with the 240-V water heater drawing across both lines and the 120-V loads returning on neutral. The resulting practical split shown in the option is about 3395 VA on the line and 3000 VA on the neutral, totaling 6395 VA.

So the fixed appliance load (line and neutral) is 6,395 VA, with the line and neutral portions approximately 3,395 VA and 3,000 VA respectively.