P
parker3074
hi
i am doing 2330 and we have been given some calcs to do but the handouts they give are pretty poor
i've had a go at the first one but need someone to tell me if i'm going wrong
( A downstairs lighting circuit of 90 metres is to be wired in 1mm thermoplastic (pvc) twin & cpc
with an over current protective device of 5A to bs 3036
calculate the circuits earth fault loop impedance if the circuit is connected to an tn-s system )
my calculation is
TN-S = 0.8
R1 + R2 = 36.20 / 1000 = 0.0362 ( AS OSG PAGE 166 STATES )
TOTAL = 4.05 OHMS
IS THIS CORRECT
i am doing 2330 and we have been given some calcs to do but the handouts they give are pretty poor
i've had a go at the first one but need someone to tell me if i'm going wrong
( A downstairs lighting circuit of 90 metres is to be wired in 1mm thermoplastic (pvc) twin & cpc
with an over current protective device of 5A to bs 3036
calculate the circuits earth fault loop impedance if the circuit is connected to an tn-s system )
my calculation is
TN-S = 0.8
R1 + R2 = 36.20 / 1000 = 0.0362 ( AS OSG PAGE 166 STATES )
TOTAL = 4.05 OHMS
IS THIS CORRECT
