Cables & Protection

Conductor and protective-device calculators for feeder and branch-circuit design: ampacity and sizing with temperature and grouping derating, conduit fill percentage, and two-device time-current coordination checks per IEC/IEEE inverse-time curve standards.

Cable Ampacity & Sizing Assistant

Suggested conductor size from load current, ambient temperature, and raceway grouping derating.

Conduit Fill Calculator

Minimum EMT trade size for a given conductor size and count, at the applicable NEC fill percentage.

Overcurrent Protection Coordination Checker

Time-current coordination check between two inverse-time overcurrent devices at a specified fault current.