Ok this may just clear up an area for me
What if your Zs is too high for automatic disconnection within required time, say 0.4 secs but the circuit is rcd protected and the rcd test reveals disconnection time of say .17ms for the 5x test. Then what does it realy matter about the high Zs?
411.3.2.2 staes that a protective device shall automatically interupt the supply of the line conductor blah blah blah. but an rcd is a protective device.
Any view on this would be appreciated.
What if your Zs is too high for automatic disconnection within required time, say 0.4 secs but the circuit is rcd protected and the rcd test reveals disconnection time of say .17ms for the 5x test. Then what does it realy matter about the high Zs?
411.3.2.2 staes that a protective device shall automatically interupt the supply of the line conductor blah blah blah. but an rcd is a protective device.
Any view on this would be appreciated.