Grounding loop
Soil type → electrode count for target resistance
Parameters
Single electrode R32.3 Ом
Electrodes needed2 шт
Norms: ≤30 Ω for re-grounding, ≤10 Ω for lightning protection, ≤4 Ω for main bus. Electrodes — angle/pipe 2–3m, spacing ≥ length, bonded with 40×4 strip.