Max Zs Values


Max Zs Values

18th edition Max Zs values.

✔ BS 7671 100% Values
✔ On Site Guide 80% Values
✔ 0.2s Disconnection Times
✔ 0.4s Disconnection Times
✔ 5s Disconnection Times

+ Extra Zs Calculators and Tables

Download Max Zs Values for iPhone, iPad or Android

Bs EN 60947-2 MCCB Charts Includes some manufacturer BS EN 60947-2 MCCB Zs value printable tables
55v and 63.5v Zs Values Includes a calculator which calculates Uo 55v (U110v) single phase and 63.5v three phase Zs values from table 41.6
RCD's in TT Systems Zs Values Includes a max Zs calculator for RCD’s in TT earthing systems from table 41.5
Maximum Disconnections Times Disconnection times from table 41.1 with a bit extra info


  • ‎Max Zs Values Screenshot
  • ‎Max Zs Values Screenshot
  • ‎Max Zs Values Screenshot