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So :D , you have on CCU 32 Amps type B MCB which feed a 3 phase+n isolator BS 88 fuse 32Amps, thru 3x4mm single core conductors(phase,neutral,earth)... From isolator is connected a ring final circuit thru 2.5mm conductors You must test this circuit and complet the test of schedule results...

I ve got it last friday :? I ve paid to OLCI 550 £, they did t show us nothing practical, 2 fellas took first time megger 1552 in their hands without nobody tell them how to use it ,2 h revision follow exam 3h on rigs :shock: Visual inspection, IR easy, for PIR no info available, survey and...