Been asked to change CU for someone. They have an old board with fuse wire and just want something newer. All the circuits test up OK my only query is the meter tails. They are obviously an old imperial size, somewhere between 16 & 25 mm. I don't go that far back but I'm sure some of you do!
So do I need to replace them with 25mm? I have a feeling it says somewhere that you should. In fact the 16th OSG does say that tails should be 25mm but is that referring to a new installation? I'm not adding any extra circuits or load and bearing in mind the cables on the suppliers side of the meter are the same size as the existing tails it would seem a bit pointless.
So do I need to replace them with 25mm? I have a feeling it says somewhere that you should. In fact the 16th OSG does say that tails should be 25mm but is that referring to a new installation? I'm not adding any extra circuits or load and bearing in mind the cables on the suppliers side of the meter are the same size as the existing tails it would seem a bit pointless.