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    1. Calculators/
    2. Demand Load Calculator

    Demand Load Calculator

    Calculate dwelling unit demand load per NEC Article 220 for service sizing.

    Based on NEC 220.82 - Optional Method

    Demand Load Calculator
    Residential service calculation per NEC Article 220
    Code Book:
    Table 310.16

    Load Breakdown

    General Lighting ( sq ft × 3 VA)0 VA
    Small Appliance (2 × 1500 VA)3,000 VA
    Laundry (1 × 1500 VA)1,500 VA
    Fixed Loads (Range, Dryer, etc.)17,500 VA

    Total Demand Load

    21,025 VA

    NEC Article 220

    Total Amps @ 240V

    87.6 A

    Suggested Service

    100 A

    Demand factors applied per NEC 220.42. This is a simplified residential calculation.

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    Voltage Drop
    Wire Size
    Conduit Fill

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    ⚠️ IMPORTANT LEGAL DISCLAIMER

    For Reference Only: This calculator is provided for educational and informational purposes only. It is not intended to be a substitute for professional engineering design, advice, or certification.

    Code Compliance: Calculations are based on the 2023 National Electrical Code (NEC®). However, local codes, amendments, and Authority Having Jurisdiction (AHJ) requirements vary by location and may supersede standard NEC requirements.

    Verify with Your AHJ: Local Authority Having Jurisdiction (AHJ) requirements take precedence over all general code references. Contact your local building department or electrical inspector to confirm applicable codes, amendments, and permit requirements before beginning any electrical work.

    No Liability: SparkShift, LLC and its affiliates assume no liability for errors, omissions, or the use/misuse of this tool. Users are solely responsible for verifying all results against applicable codes and standards before installation. Always consult a licensed electrician or Professional Engineer (PE).

    NEC Reference: NEC 220.82 - Optional Method

    © 2026 SparkShift, LLC. Calculations are for reference only.

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