Can anyone remember the I.E.E. Regulation applicable, and the era, and even the reg. number, when it was stated that in certain situations an all insulated fuse box was to be used as opposed to a metal one?
(From Andy post)They do seem to have an odd requirement for CUs to have a fuse on the incomer (usually 63A).
Not the subject of discussion but that rule appear to be super seeded. Hear is a list below of updated rules And for the main fuse (Now MCB) The MCB shall be located in a weatherproof enclosure having a degree of protection IP55 and made of non-conducting self-extinguishing material (750'C).
Question ? What sort of box is that or is just a way of regulators passing the buck on to others to sort out.
Regarding the main over current device (M.C.B.) This is a bit worrying. I would prefer a nice robust H.R.C. cartridge fuse myself for proven reliability, longevity and safety.
"b) In the case of installations having a maximum import capacity (MIC) less than 50 kA, the MCB shall have a rated short-circuit breaking capacity of at least 9kA."
(From Andy post)They do seem to have an odd requirement for CUs to have a fuse on the incomer (usually 63A).
Not the subject of discussion but that rule appear to be super seeded. Hear is a list below of updated rules And for the main fuse (Now MCB) The MCB shall be located in a weatherproof enclosure having a degree of protection IP55 and made of non-conducting self-extinguishing material (750'C).
Question ? What sort of box is that or is just a way of regulators passing the buck on to others to sort out.
Regarding the main over current device (M.C.B.) This is a bit worrying. I would prefer a nice robust H.R.C. cartridge fuse myself for proven reliability, longevity and safety.
"b) In the case of installations having a maximum import capacity (MIC) less than 50 kA, the MCB shall have a rated short-circuit breaking capacity of at least 9kA."
