Hi Guys, Have a situation with a Wylex 60A single phase switch fuse isolator that is overheating & conductor insulation is burnt. It is supplied by 25mm tails from a henley block. There are also more henley block connections across all phases which I don't like at all. Anyway, for safe isolation, the only means is to pull the main fuses. The DNO's supply is a Lucy 185mm cut out. There are no seals in place, looks like previous workers have removed them if they were there in the first place, knurled nuts holding front cover on. I am thinking 70mm supply by the size of the main earth. To pull or not to pull the fuses? To prevent a fire, or would the DNO come out as an emergency? Either way, there will be a power down & I guess we would have to wait for someone to replace the fuses when the remedial works are completed. The company is a minibus service with garage workshops, for local County Council & have a tracking system & a lot of IT equipment, phones are important for parents if they need to check on their child. Meanwhile, the supply is only ticking over until the morning when the office staff come in, the total load previously measured was around 52 Amps. I would like to turn the 6oA supply off as being unsafe, but I guess it could have been like that for ages. Would appreciate some input & thanks in advance for your time.