Earth Fault Loop Impedance Path for Installations connected to a TN-S Earthing Arrangements

Earth fault Loop Impedance path for an installation connected to a TN-S earthing arrangement. The earth fault loop impedance path need to be of low impedance so the fault current is high. This high fault current will cause the overcurrent protective device (fuse) to operate very quickly. The path consists of the exposed conductive part, the CPC, the earth bar, the earthing conductor and the line conductor.  

= 🕐 Time Stamps - Cut to the action 🕕 ==

00:00 - Earth fault loop path
00:08 - TN-S earthing arrangement
00:16 - Exposed conductive part
00:25 - The exposed conductive part becomes live
00:32 - CPC becomes live
00:37 - Earth bar becomes live
00:42 - Earthing conductor becomes live
00:55 - Supply earth becomes live
01:11 - Cutout fuse will not operate
01:24 - Fuse in the consumer unit operates

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