BS 7671:2018+A2:2022
Cable Sizing Tool
IET Wiring Regulations — design current, correction factors & voltage drop
Electrical Load
Load input type
Motors 0.8–0.85 · Resistive 1.0 · General 0.9
Supply system
One-way cable run
Cable Properties
Conductor material
Insulation type
Installation
Clipped directly to wall or ceiling — good heat dissipation
Correction Factors
Ca — Ambient temperature
BS 7671 Table 4B1
1.00
Cg — Grouping factor
BS 7671 Table 4C1
1.00
Ci — Thermal insulation
BS 7671 Section 523
1.00
Combined factor Ca × Cg × Ci
Applied to tabulated cable rating
1.000
Results
Cable Size
—
mm²
Design Ib
—
Amperes
Min. Rating In
—
A (corrected)
Voltage Drop
—
Volts
Volt Drop %
—
Limit: 5%
Combined Factor
—
Ca × Cg × Ci
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