Conductors & Transformers
AC Voltage Drop Calculator
Estimates single- or three-phase voltage drop using user-supplied conductor impedance per 1,000 ft.
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Conductors & Transformers calculators
Focused tools for a first pass on conductors & transformers projects.
Conductors & Transformers
Cable Tray Fill Area Calculator
Calculates geometric cable area occupancy from areas entered by the user, without applying NEC cable-tray installation rules.
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Conductor Ampacity Adjustment Calculator
Applies user-supplied correction and adjustment factors to a selected conductor ampacity value.
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Conduit Fill Area Calculator
Calculates area occupancy from user-entered raceway and aggregate conductor areas; no NEC fill table or allowable fill rule is embedded.
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Control Transformer Load Estimate
Estimates required apparent power from user-entered simultaneous steady and pickup VA loads plus an explicit margin; it does not select a standard transformer rating.
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Equipment Grounding Conductor Table Value Check
Compares a selected conductor area with a minimum area entered from a verified applicable source table; it does not select the code table value.
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Parallel Conductor Current Calculator
Divides a stated total current evenly among parallel conductors; it does not select conductor size or determine code eligibility.
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Transformer kVA and Full-Load Current Calculator
Calculates single- or three-phase apparent power and primary or secondary full-load current from electrical quantities.
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Transformer Loading and Capacity Margin Calculator
Calculates apparent load, percentage loading, and unused nameplate capacity from measured load inputs.
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Transformer OCPD Current Estimate
Calculates transformer-side current and applies a user-entered percentage for preliminary comparison; it does not determine NEC-permitted overcurrent protection.
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