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Hi all hope you are all well. My mind is blank on a basic question. 1, state 3 reasons why sampling can be applied to the periodic inspection and testing of the office lighting circuits. I can only think of one, that being previous test results are available. anything else ?

Examples of insulation on individual circuits The following I.R results were measured on individual circuits of a domestic installation, Cooker - 200M :ohms Sockets - 200M :ohms Lights - 200M :ohms Shower - 200M :ohms Outside Lights - 1.2M :ohms Line to Earth What would the...