Fault Loop ((link)) Instant

The size (impedance) of this loop determines one critical thing:

. Impedance is the total resistance and reactance that the current encounters along the loop. fault loop

The loop consists of several key components: The size (impedance) of this loop determines one

Disclaimer: Electrical testing should only be performed by qualified persons. The values and regulations mentioned vary by country; always refer to your local wiring standard (NEC, IEC, BS 7671, AS/NZS 3000). The values and regulations mentioned vary by country;

According to Ohm’s Law, the current flowing during a fault is equal to the supply voltage divided by the total impedance of the fault loop (I = V / Z). If the loop impedance is too high, the fault current will be too low. A low fault current might not trip a circuit breaker or blow a fuse quickly—or at all. This is dangerous because the metal casing of a faulty appliance could remain live indefinitely, waiting for someone to touch it.