Electrical field tools
Loads & Services
Plan service loads, feeders, jobsite power, and connected energy systems.
Service & Load Calculations
Estimate dwelling and commercial loads and review service capacity.
Commercial Feeder and Service Load CalculatorEstimate non-dwelling load and review a separate conductor-sizing basis.Multifamily Dwelling Load CalculatorEstimate connected and diversified load for repeated dwelling units.Household Range Demand CalculatorEstimate cooking appliance demand from count and nameplate rating.Household Dryer Demand CalculatorEstimate clothes dryer demand from count and nameplate rating.Fixed Appliance Demand CalculatorEstimate demand for qualifying fixed appliances.Heating and Cooling Noncoincident Load CalculatorSelect the larger heating or cooling load when systems cannot operate together.Commercial Kitchen Equipment Demand CalculatorEstimate diversified demand from connected commercial kitchen equipment.Commercial Receptacle Load CalculatorEstimate connected and demanded load from commercial receptacle yokes.Commercial Lighting Load CalculatorCalculate connected and continuous sizing load from area and unit load.Panel Phase Load Balance CalculatorCompare phase loads and quantify maximum imbalance from average.Continuous Load Circuit Capacity CalculatorApply continuous-load sizing treatment and calculate required current.Dwelling Load CalculatorCalculate one-family service load using standard or optional methods.Existing Service Capacity CalculatorCheck proposed loads against an existing dwelling service.
EV & Renewable Systems
Check EV charging tasks and photovoltaic string values.
EV Charging Energy Cost CalculatorEstimate grid energy, session cost, annual charging cost, and cost per mile from user inputs.EV Charging Load Management CalculatorCompare EV charging demand with available service capacity.PV Array and Inverter Ratio CalculatorCalculate DC array to inverter size ratio.PV Interconnection Busbar CalculatorCompare main and PV breaker contributions with a bus rating.Battery Storage Capacity CalculatorEstimate required storage energy for load, duration, usable capacity, and efficiency.EV Charging Time CalculatorEstimate battery charging time from charge level and EVSE output.EVSE Circuit and Service Load PlannerCheck one charger circuit and its added dwelling service load.PV String and DC Wiring CalculatorEstimate cold string voltage, inverter limits, and DC wire drop.
Jobsite Power & Estimating
Screen temporary power and prepare rough material and labor estimates.
Commercial Material and Labor EstimateBuild a rough estimate from user-entered quantities and prices.Temporary Power Load CalculatorSum temporary loads and calculate source current.Conductor and Raceway Quantity CalculatorEstimate conductor counts, total length, and average loading across raceways.Residential Material Takeoff EstimatorEstimate device, box, cable, raceway, and conductor quantities.Temporary Power Cord Screening ToolCheck cord current and voltage drop from jobsite inputs.
Generation & Lighting
Estimate generator demand, battery runtime, and fixture layouts.
Battery Runtime CalculatorEstimate runtime from battery energy and a steady load.Lighting Retrofit Savings CalculatorEstimate energy and maintenance savings, net project cost, and simple payback for a lighting replacement.Generator Fuel Runtime CalculatorEstimate runtime from tank volume and fuel consumption.UPS Capacity CalculatorEstimate UPS kVA from load, power factor, and headroom.Generator Load and Motor Start EstimatorCompare steady and motor-start loads with generator ratings.Lighting Fixture Count and Spacing EstimatorEstimate fixture count and even-row layout spacing.