Tools

Engineering tools

Precision calculators built for working engineers - dual-code NEC and CEC, free to use, no sign-up. Every result comes with the derivation trace behind it.

Free tool

Conductor Sizing

Ampacity, derating and voltage drop

Ampacity, derating, voltage drop, bonding and conduit fill - LV and MV, NEC and CEC, with a full calculation trace you can check.

NEC & CEC in parallelLV and MVVoltage drop enforcement

Free tool

OCPD Sizing

Fuse and breaker sizing

Fuse and breaker sizing for general loads, motors, transformers, listed equipment and capacitors - with the conductor-protection check.

Five load naturesNEC & CECConductor protection check

Free tool

Protection & Coordination

Curves, short circuit and arc flash

Time-current curves, one-line diagram editing, per-bus short circuit study and arc flash incident energy.

TCC plottingOne-line diagramPer-bus fault study

Free tool

CT & VT Sizing

CT and VT verification

Verify a CT or VT against the application - ALF', knee-point, FS_op and burden - with every derived quantity shown, not typed in.

IEC & ANSI classesSix applicationsDerived burden and ALF'

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