EAL Level 3 Inspection & Testing Practice Questions - EAL Level 3 Award In Initial Verification And Periodic Inspection & Testing Exam

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In a TT earthing system, what protective device is generally required to achieve automatic disconnection of supply for final circuits due to high earth fault loop impedance?

Type B Miniature Circuit Breaker (MCB) Residual Current Device (RCD) High Rupturing Capacity (HRC) Fuse Semi-enclosed rewireable fuse (BS 3036)

Correct Answer:

Residual Current Device (RCD)

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