Everybody Should Know this... Calculate R1+R2, Zs and Find the Length of a Circuit for Fault Finding
Sparky Help
13,869 views
Design a circuit for R1+R2, calculate Zs - plus an explanation of Zs and Ze. Ready for the 2391 or a design module. Find the length of a cable knowing the resistance and how it could be used during fault finding.
Please note: The Max values are from the 17th edition of BS7671, the Max Zs should read 1.09Ohms.
7 Comments
@ramzg5402 4 years ago
Hi Sir, I watched all your videos and they are all brilliant thank you very much.
@siani5299 3 years ago
At 10:55 you said your cable was not incorporated in a cable however you chose the figure from the incorporated table?
@ismaelpires9634 4 years ago
Hi ,i have done this questions .its A3 radial circuit 2.5mm pvc/flat cable 1.5 cpc,40m lenth and it's F 30 degrees ,with 0.35 Ze value ?
@Teebile 2 years ago
Hi thanks for the videos . I have used the formula in this video for a ring main circuit and my assessor has told me it’s incorrect. To calculate Zs should it not be divide by 4000 ?
Everybody Should Know this... Calculate R1+R2, Zs and Find the Length of a Circuit for Fault Finding
Sparky Help
13,869 views
Design a circuit for R1+R2, calculate Zs - plus an explanation of Zs and Ze. Ready for the 2391 or a design module. Find the length of a cable knowing the resistance and how it could be used during fault finding.
Please note: The Max values are from the 17th edition of BS7671, the Max Zs should read 1.09Ohms.