The recommended cable sizes are based upon information provided by the user and are
intended as a guide only. The calculation is derived from BS7671 Requirements for Electrical
IEE Wiring Regulations, Installation method C (Clipped Direct), for cable types BS5467 and BS6724 and is
based on the voltage drop selected at 230 and 400 volts.
It remains the responsibility of the user to ensure all data and assumptions are correct and that any
cable used is suitable for its intended purpose.