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I.S. 10101:2020 Earth Fault Loop Impedance (Zs) Calculator

Compliance verification incorporating Table 41.3, the 80% ambient derating rule (Clause 6.4.3.7) & Section 705 25V Touch Limits.

Statutory Assessment (50V Standard)
Enter a measured Zs reading to evaluate compliance.
Your Reading—
80% Ambient Limit (20°C)1.10 Ω
Nominal Max (Table 41.3 @ 70°C)1.37 Ω
Want to auto-calculate entire distribution boards?

Spark Office auto-calculates 72-way boards with I.S. 10101 Table 41.3 limits.