The minimum permissible insulation resistance value between live conductors and earth on a low voltage lighting circuit is

Question

Quizplus · Accepted Answer

The minimum permissible insulation resistance value between live conductors and earth on a low voltage lighting circuit is 1.0 MΩ as per the IEC 60364-4-41 standard. A value of 1.0 Ω (option A) or 1.0 mΩ (option B) is too low and would indicate a fault or a poor insulation system. An insulation resistance value of 0.5 MΩ (option D) is not high enough for safe operation and could potentially lead to leakage current and electric shock hazards. Therefore, option C with a value of 1.0 MΩ is the correct and safe choice.

The Minimum Permissible Insulation Resistance Value Between Live Conductors and Earth