Calculator
Panel SCCR Rating Check
Short-circuit current rating screening per NEC 409: weakest-link rating, series-tested combinations, and the available-fault verdict. 7 inputs, 5 outputs with grouped results.
Open calculatorCalculators
Electrical calculators
Load and power, wire and voltage drop, motors and protection, 24V control power, heat, lighting, backup, and raceway, each with visible math.
Calculator
Electrical Box Fill Calculator
NEC 314.16 fill from gauge-based allowance, conductors, devices, grounds, clamps, with verdict. 6 inputs, 4 outputs with grouped results.
Open calculatorCalculator
Transformer Sizing Calculator
FLA both sides, 125% protection hints each side and standard primary OCPD. 3 inputs, 4 outputs with grouped results.
Open calculatorCalculator
Fault Current Calculator
Infinite-bus fault current with impedance picker, kA result, AIC verdict and common breaker ratings. 4 inputs, 4 outputs with grouped results.
Open calculatorCalculator
Wire Ampacity Calculator
Dataset ampacity with temperature-rating picker, bundling derate, continuous limit and gauge verdict. 4 inputs, 3 outputs with grouped results.
Open calculatorCalculator
Conduit Fill Calculator
NEC Chapter 9 fill with wire-area picker, conduit picker, derating hint and spare verdict. 4 inputs, 4 outputs with grouped results.
Open calculatorCalculator
UPS Load Budget
Loading, headroom, watts, runtime scaler and growth room to the 80% industry line. 5 inputs, 6 outputs with grouped results.
Open calculatorCalculator
Battery Runtime Estimator
Usable Wh with chemistry preset, runtime at load, inverter loss and days-of-autonomy sizing. 6 inputs, 3 outputs with grouped results.
Open calculatorCalculator
LED Power Injection Spacing
Max feed spacing from drop budget, current per feed and feeds needed for the run. 5 inputs, 3 outputs with grouped results.
Open calculatorCalculator
LED Power Supply Capacity
Run watts, per-driver share, 80% driver rule, spare drivers and longest single feed check. 4 inputs, 4 outputs with grouped results.
Open calculator