eic zs boxes

[mrloy99]

not a problem,more an observation.When filling in EIC forms,on Zs boxes it is prefered to use the maximum quoted values of supply companies rather that your actual reading/measurement.Ze+(R1+R2)
0.35ohms TN-C-S
0.85ohms TN-S
21ohms TT

 

[WarrenG]

not a problem,more an observation.When filling in EIC forms,on Zs boxes it is prefered to use the maximum quoted values of supply companies rather that your actual reading/measurement.Ze+(R1+R2)
0.35ohms TN-C-S
0.85ohms TN-S
21ohms TT

If its on the circuit details page then these Zs figures are taken from the Regs book Tables 41.2 / 41.3 / 41.4 as maximum permitted values.

If its on the Test results page then the Zs values are tested and taken at the furthest point of the circuit and compared with your Ze+(R1+R2) value. Value could be different due to being a live test and parallel circuits.

Some Rule of thumb stuff on this thread including a Loop Chart:

http://www.electriciansforums.net/i...-earth-loop-impedance-table-17th-edition.html

 

[Spudnik]

On the NICIEC 17th edition certs there are Boxes for external Ze and measured Ze.

However, on the test results page, you should record the actual values of Zs for each circuit to prove the readings are acceptable.