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The regulations and the guide; installation requirements and characteristics; control and protection of electrical installations - switching, isolation, protection against electric shock, - thermal effects, - overcurrent, - short-circuit current, - overload and short circuit; earthing - earth fault loop impedance, protective conductors, earth electrodes, protective multiple earthing, earthed concentric systmes; cables and their enclosures - choosing the correct cable, supports joints and terminations, cable enclosures, cable and conductor identification; circuits - maximum demand and diversity, circuits for socket outlets to BS 1363, circuits for industrial socket outlets, segregation of circuits; special situations - caravans and caravan sites, rooms containing fixed baths and showers, heating applications and installations, discharge lighting, construction site and temporary installations, agricultural and horticultural installations, overhead wiring systems, underground wiring systens; inspection and testing.