Loft Insulation

[jenions]

went to a job today and they customer had recently had her loft insulated, after a brief look i noticed that the lighting was wired in 1mm t&e, now i ent done no calcs or anything but just off my head i was i taught 1.5mm if loft insulation is to be installed. now just say for instance if anything wa to happen to the cables who would be responsible? would it be the insulation company for not checking the cable was suitable? just got me thinking

 

[geoffa]

433.1 states that "every circuit shall be designed so that a small overload of long duration is unlikely to occur"

nosparks,
in your last post were you referring to reg 433.1.1?
part (iii) says "the current causing effective operation of the protective device does not exceed 1.45 times the lowest of the current-carrying capacities of any of the conductors of the circuit"

any suggestions on what that means exactly