BS 7671 Volt Drop Calculator. Calculates volt drop for a new cable. Will calculate total volt drop, and. Percentage of supply voltage. Works for 230 and 400V supplies. Complies with Appendix 4 of. BS7671 17th EDITION REGS. Reference to IEE regs is required to use this App. This App is intended for students and Electricians who. Prefer to refer to regs.
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