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Question 5 a) Four circuits are installed in conduits as shown in Figure B3a. A 45⁰ 45⁰ i) ii) iii) 8m 4m B 6m Circuit 1, one 13A sockets ring final circuit from point A to point D -Circuit 2, 3 phase motor delta connected, all 4mm² wires from point A to point C Circuit 3, 3 phase 16A industrial socket, all 2.5mm² from point A to point B - Circuit 4, 2 groups single phase load, all 2.5mm² from D to C Figure 83a Determine the minimum size of conduits of PVC conduit between points A to B B to C B to D Metallic Trunking (3 marks) (3 marks) (3 marks) b) If the four circuits above are installed in metallic trunking as shown in Figure B3b. Figure B3b There are then 30 nos. of 6mm² 1/C PVC Cu normal power cable and 10 nos. dia. 11mm 24V control cable run from MCC to pump control panel. Determine the minimum size of trunking for enclosing all the cables. Justify your answer. (7 marks) c) After the installation is completed, give 4 tests in recommended sequence according to the Code of Practice that should be carried out before the circuits can be put into service. (4 marks)