Hi, I bough one of these extractor fans to use in my (home) garage workshop; to extract airborne dust, fumes etc. It will be fitted high up on a wall or to the ceiling and ducted to outside. I'd planned to wire it to some flex with a 3-pin plug fused at 3amps and simply plug it into a socket. However... the instructions tell me: "a flexible cord must not be used" and go on to state: "A double pole fused spur having a contact separation of 3mm in all poles must be used and fitted with a 3A fuse" Two questions... Is this really necessary given the intended use (i.e. NOT for a bathroom and NOT controlled via the light etc. NOT in a loft space)? If I have to comply... I'd like to use MK Metalclad (same as the rest of the garage) but it seems they don't have fused isolator switches in the range... Any suggestions? Thanks in advance!