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 Amendment 3 2015 values
+ BS EN device's
+ Ze + R1+R2 = Zs
+ 100% values
+ 80% values
+ 0.4 second disconnection times
+ 0.2 second disconnection times
+ 5 second disconnection times
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V 2.0 - 27/09/2015: Updated Zs values for BS 7671 amendment 3 2015.
V 2.1 - 28/09/2015: Fixed share bug.
Ratings and Reviews
Works well for me.
I have the whole Pro-Certs range of iPhone software. If they keep producing quality items like this I can throw away my onsite guide! Keep up the good work!! ( can wait to see if you can make software to bill my customers as well!! Lol)
A first class app, the best one of this type, and i have tried them all.
Great communication from the devs, they are going to add some manufacturer specific devices for me too in a free update.
Up to six family members will be able to use this app with Family Sharing enabled.