Hello everyone I'm Chris. I am taking the 2391 in February. This question is from the c&g main site under 2391 sample questions. Continuity of a ring final circuit has been tested as part of an initial verification of a new primary school. All the socket-outlets are connected directly to the ring. The circuit loop length is 58 m long, wired in 4 mm2 live and 1.5 mm2 cpc flat profile cable. The circuit is protected by a 32 A BS EN 60898 Type B circuit breaker. The installation has a measured Ze of 0.29 Ω. What is the expected value of Zs for this circuit? a) 0.24 Ω b) 0.28 Ω c) 0.53 Ω d) 0.58 Ω The answer is C.
I don't get that answer just wondered if anyone would like to help me as to what i am doing wrong. Many Thanks Chris.
I don't get that answer just wondered if anyone would like to help me as to what i am doing wrong. Many Thanks Chris.