P
Paulr
hi
I would like clarification on the following: 101 shows a cable clipped to a ceiling joist and then covered with 100mm of insulation ( from memory). 103 shows a cable fully surrounded by insulation in a stud wall. If I have a cable clipped to a stud in a wall which is insulated with sound insulation ( not thermal) and the cable is not quite in contact with the inner skin of the wall is this 103 or possibly 101 ?. If the cct is a ring and run in 2.5mm twin and Earth and it's considered 103 then the cable rating reduces to 13.5 amp, with it being a ring this is then a total of 27 amps I believe , should this be protected by a 25 amp CB type B or would it be considered safe at 32 amp ?
I would like clarification on the following: 101 shows a cable clipped to a ceiling joist and then covered with 100mm of insulation ( from memory). 103 shows a cable fully surrounded by insulation in a stud wall. If I have a cable clipped to a stud in a wall which is insulated with sound insulation ( not thermal) and the cable is not quite in contact with the inner skin of the wall is this 103 or possibly 101 ?. If the cct is a ring and run in 2.5mm twin and Earth and it's considered 103 then the cable rating reduces to 13.5 amp, with it being a ring this is then a total of 27 amps I believe , should this be protected by a 25 amp CB type B or would it be considered safe at 32 amp ?