Cable Selection & Voltage Drop
Cable Capacity Selector from Verified Reference Data
Reverse-calculate the reference ampacity needed for a load and protective device after an entered installation correction factor.
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Use these calculators to review cable capacity, correction factors, parallel conductors, voltage drop, earth fault loop reach and short-circuit duty. They work from entered reference data and project conditions; select final cable systems from verified tables and installation information.
Cable Selection & Voltage Drop
Cable Derating Factor Calculator
Combine separate ambient, grouping, installation and thermal factors before applying them to a verified reference cable capacity.
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Cable Size by Earth Fault Loop Impedance
Estimate the maximum route length and fault current from a target fault current and entered line/earth conductor impedances.
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Cable Size by Voltage-Drop Check
Estimate the minimum conductor area implied by a user-entered reference impedance and voltage-drop limit.
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Cable Capacity Check
Compare design current and protective-device rating with a user-entered cable ampacity after a verified combined correction factor. No cable tables are included.
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Multi-Segment Installation Voltage Drop
Add voltage drop across two or three route segments and compare the cumulative result with an entered limit.
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Parallel Cable Ampacity Calculator
Estimate total and corrected ampacity for parallel cable runs using an entered per-run capacity and grouping factor.
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Voltage Drop and Maximum Length Calculator
Calculate AC voltage drop, the entered voltage-drop limit in volts and the user-limit-based maximum route length from entered conductor impedance data.
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