BS 7671 : 2018 + A2 : 2022
Cable Sizing Calculator
IET Wiring Regulations 18th Edition — current capacity, derating & voltage drop
Electrical Load
Load input type
Supply system
Cable Properties
Conductor material
Insulation type
Construction
Armouring
Installation Method
Clipped directly to wall or ceiling — good heat dissipation, widely used reference method.
Correction Factors
Ca — Temp
1.00
Cg — Group
1.00
Ci — Insul.
1.00
Cf — Armour
1.00
1.000
Combined
Ca×Cg×Ci×Cf
Ca×Cg×Ci×Cf
Cable Size
—
mm²
Design Ib
—
Amperes
Corrected Iz
—
A (derated)
Voltage Drop
—
Volts
Volt Drop %
—
Limit: 5%
Combined Factor
—
Ca×Cg×Ci×Cf
Full Calculation Breakdown
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