Dwelling Small Appliance Load Calculator

A dwelling small-appliance load calculation establishes the VA allowance associated with the kitchen or dwelling small-appliance branch circuits recorded on a residential load worksheet. The calculator produces two values:

• Connected allowance — the total VA represented by the entered small-appliance circuits before demand is applied.
• Assessed allowance — the connected allowance after the entered demand factor is applied.

These values are used during dwelling load review when assembling branch-circuit, feeder, or service demand loads. The result can be carried into a project worksheet before selecting feeder conductor ampacity, evaluating service loading, or reviewing the calculated load against available panelboard and service capacity.

The calculation is expressed in VA because it is a load-accounting value. It is not a direct conductor-size result. Any conversion to current, conductor AWG or kcmil selection, terminal rating review, overcurrent protection decision, voltage-drop evaluation, or raceway fill determination requires the applicable project voltage and the separately verified installation conditions.

Small-Appliance Branch-Circuit Allowance

The Small-appliance circuit count is the number of branch circuits being included under the adopted dwelling worksheet or project basis. The calculator does not determine the required circuit quantity; it applies the quantity entered to the entered allowance.

Entered allowance per circuit (VA) is the VA value assigned to each included small-appliance circuit. This value must come from the adopted requirement, AHJ worksheet, approved design basis, or a verified project record. The calculator intentionally leaves this allowance editable rather than selecting a value automatically.

The Connected allowance is calculated as:

\(\displaystyle \text{Connected allowance} = \text{Small-appliance circuit count} \times \text{Entered allowance per circuit}\)

This establishes the undiversified small-appliance allowance to be carried into the dwelling load worksheet before applying the project’s documented demand treatment.

Demand Load Assessment

The Entered demand factor applies the demand treatment selected in the project documentation. It is entered as a multiplier, shown as (x).

The calculator does not choose a demand factor. The electrical designer, estimator, or qualified installer must use the factor supported by the adopted calculation method and the AHJ’s accepted worksheet or project requirements.

The assessed value is:

\(\displaystyle \text{Assessed allowance} = \text{Connected allowance} \times \text{Entered demand factor}\)

A demand factor of (1) leaves the full connected allowance unchanged. A factor below (1) reduces the assessed VA only when that reduction is supported by the applicable calculation basis. Do not apply a demand factor merely because a load appears unlikely to operate at full use.

Calculation Example

Using the entered worksheet values:

Input	Entered value
Small-appliance circuit count	2 circuits
Entered allowance per circuit	1,500 VA
Entered demand factor	1
Existing appliance rows to review	0 VA

First, calculate the connected allowance:

\(\displaystyle 2 \text{ circuits} \times 1{,}500 \text{ VA per circuit} = 3{,}000 \text{ VA}\)

Then apply the entered demand factor:

\(\displaystyle 3{,}000 \text{ VA} \times 1 = 3{,}000 \text{ VA}\)

Connected allowance: 3,000 VA Assessed allowance: 3,000 VA

Where the broader dwelling calculation requires current rather than VA, the voltage and system configuration must be established separately. For a simple single-phase load review, the relationship is:

\(I = \frac{VA}{V}\)

That current value may then be part of a feeder or service load calculation, but it does not by itself establish final conductor ampacity. Conductor sizing still depends on the complete calculated load, applicable adjustment factor and correction factor, current-carrying conductors, terminal rating, insulation temperature rating, and the installed wiring method.

Duplicate Appliance Row Review

Existing appliance rows to review (VA) is an optional worksheet-control input. Enter the total VA of appliance-specific rows that may already represent equipment included elsewhere in the dwelling load calculation.

A nonzero entry triggers a duplicate-input review flag. It does not reduce the connected allowance or assessed allowance automatically. The purpose is to identify a possible situation where the same kitchen or dwelling load may be represented both by the small-appliance branch-circuit allowance and by separate appliance rows.

Resolve the worksheet treatment before finalizing the feeder or service calculation. The appropriate treatment depends on the adopted calculation basis, documented appliance loads, and AHJ requirements.

Field Verification

Verify the following outside the calculator:

• The Small-appliance circuit count matches the branch circuits included in the adopted residential load worksheet.
• The Entered allowance per circuit (VA) is supported by the project basis, AHJ worksheet, or verified record.
• The Entered demand factor (x) is documented and appropriate for the selected calculation method.
• A nonzero Existing appliance rows to review (VA) entry has been reviewed for overlapping or duplicate load entries.
• The assessed VA is combined with the rest of the dwelling load before making feeder, service, conductor ampacity, overcurrent protection, voltage-drop, or raceway layout decisions.

The calculator performs the stated VA arithmetic. Code compliance, appliance classification, demand treatment, and final installation decisions remain subject to the adopted requirements and AHJ approval.