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## Online Interactive Residential Electrical Load Calculator

 Summary: Residential Electrical Load Calculator, Online and Interactive provides accurate main service panel load calculations. © By: Dave Rongey

Quick Start Guide for the Electrical Load Calculator
 Advanced Experienced Electricians No explanation needed.
 Novice Homeowners and Students Detailed explanations to help you get it right.

 Please Note: This online calculating tool requires javascript to be turned on in your browser.

## Residential Electrical Load Calculator for the Main Service

NOTE:
This form and calculator has been updated and tested:
Posted: 2023-07-18
Est. Minimum Size of the Electrical Service - 2020 NEC
Based upon NEC Articles 220.82(A), 220.82(B)(1), 220.82(B)(2), 220.82(C)
,220.82(A)
 Step #1 General Electrical Load Requirements Ref: NEC Article 220.82(B)(1) Quantity Load Elect. Code & Information Indoor Sq. Ft. Area of the Home - - - Small Appliance Circuits 2 3 4 5 1500VA Ea. Laundry Circuit 0 1 2 3 4 1500VA Ea. Sec. #1 Sub-Total = - - Step #2 Appliance & Motor Loads VA Ref: NEC Article 220.82(B)(2) Dryer(s) 0 4800 5000 9600 10000 Oven(s) 0 1200 1800 2400 4000 8000 Cook top Stove or Range 0 5000 8000 10500 11000 12000 Cooking Unit / Microwave Oven 0 1000 1580 2500 5100 Water Heater 0 4500 Hydro Massage Tub Motor 0 600 875 Dishwasher 0 600 950 1200 Disposal 0 550 600 700 800 Garage Door Opener 0 450 600 Additional Appliance(s), Including EV Chargers 0 1000 2000 4000 6000 7200 8000 10000 12000 15000 Sec. #2 Sub-Total = - - Sec. #1 Sub-Total = Sec. #1 and Sec. #2 Total = First 10Kva @ 100% = The Remaining 40% = Adjustment 40% of Remainder = Sec. #1 and Sec. #2 Adjusted Total = - - Step #3 Heating & Air Conditioning VA Ref: NEC Articles 220.82(B)(3) &(4), 220.82(C) Single Source Heating Unit Heating and Air Conditioning Unit OR Heat Pump without Supplemental Heat Heating Unit with Supplemental Heat Source OR Supplemental Heating for Heat Pump Heat Heat Pump OR Separately Controlled - Space Heaters VA Each How Many Space Heaters OR Continuous Electric Thermal Storage Sec. #3 - Factors on the Highest Calculated Load : - - Step #4 Perform the Calculations Ref: NEC Article 220.82(A) - - Calculated Total VA Load = Calculated Total Amps Load = Reset the Form - - -

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 IMPORTANT: The calculating tools are provided as a guide to assist you to understand the process of accurately sizing a residential electrical panel based on proposed loads. The results of the calculations are based upon the accuracy of the information that you provide. The [Calculate] Button must be pressed when any changes are made to the form. Accurate load sizing is best performed by a professional architect or engineer which is reviewed by the building department in your jurisdiction. Calculations may vary depending on actual Air Conditioning and Heating loads which may require adjustments. This tool is based upon NEC codes, however it is not authorized or intended to replace or represent official NEC calculations.

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