Disclaimer

The calculators and information on PowerVoltEdge are for study and estimating only. They are not a substitute for design by a competent person.

• Always check results against the current edition of BS 7671, the IET On-Site Guide and the manufacturer's data.
• Electrical installation work must be carried out, inspected and tested by a qualified, competent person, and notified where Building Regulations require it.
• Results depend on the values you enter. Check your inputs, especially lengths, currents and disconnection times.
• We work hard to keep every figure correct, but we can't accept liability for losses or damage arising from use of this site.

Found an error? Email contact@powervoltedge.co.uk and we'll fix it.