Calculate maximum permitted Zs values (earth loop impedance) as per BS7671, also includes temperature adjusted values.
Using the picker wheel select the protective device (fuse’s, MCB’s, RCBO’s) and device rating to calculate the maximum permitted Zs value for your selected device.
+ BS7671 Amd 1 2011 17th Edition Values
+ BS EN device’s
+ Fuse’s, MCB’s, RBCO’s
+ 100% values
+ 80% values
+ 0.4 second disconnection times
+ 0.2 second disconnection times
+ 5 second disconnection times
It’s just what I needed, works really well and values meet BS7671 Amd 1.Robogxr
A first class app, the best one of this type and I have tried them all.