AS/NZS 3000

Earth Fault Loop Impedance

Estimate earth fault loop impedance and verify that your protection device will trip within the required 0.4-second disconnection time.

For reference only — always verify with the current published standard and consult a licensed electrical engineer for critical installations.

Fault Loop Inputs

Protection Device

Device Rating (A)

Cable Size (mm²)

Cable Length (m)

Cable Material

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