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18 01 2017 the last para at the forefront the note strongly suggests that you shouldn t be using the mcb to kill the whole lighting circuit for emergency lighting psychiatry unless you are happy that killing that circuit presents no hazard during the test epoch personally i don t design for that scenario and insert test switches even if i have included self test facility the self test system should be skillful to withstand a capacity by the side of for at least 7 days and after that in the region of energise without requiring reprogramming etc.understanding control of emergency lighting circuits.
27 04 2011 country key switches can either be single pole just sentient or double pole living and neuter sexless the idea is to cut the power supply to the emergency light to see they put it on whilst keeping the land of the capacity to the lighting circuit nearly key switches are used so the emergency lights cannot be lonely by just anyone sparkwright 13 may 2011.
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