All toolsCalculatorsElectricalCable Sizing

Cable Sizing

Indicative cable sizing for UK tender-stage checks to BS 7671.

System

Phase

Supply voltage

V

Material

Load

Input type

Design current (Ib)

A

Power factor

Cable run

One-way length

m

Max volt drop

Installation

Method

Grouping derating

1.00 = no derating

Ambient temperature

°C

BS 7671 Table 4B1 Ca (30 °C = 1.0)

Enter current and length to see shortlist