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Just been along to see a potential client. They want an estimate to upgrade the fuse in their 1 way splittersplitter. It is currently a 30amp cartridge fuse.
They just had a bathroom company redo the bathroom, and they changed the shower to a new 9.8kw unit - which their electrician installed.
I had a look at it and the supply cable which disappears under the floor at the old fuseboard only reappears in a cord pull isolator in the bathroom - maybe 5m away. the problem I have is that the load cable from the splitter is obviously 6mm T&E.
so, I = p/v 9800/230 = 42.61a
Table 4D5 allows for 47amps - clipped direct - but this cable has a way to go and I'd say that at least a third of the run is sunk in plaster and a good bit of that in a new tiling job. So replacing the supply will be messy at best - as well as expensive, and the job has just been done. I can't believe the spark would have let it run through a 30amp cartridge fuse in any case.
I know there should be some allowance given for a short load duration - but what are your thoughts?
They just had a bathroom company redo the bathroom, and they changed the shower to a new 9.8kw unit - which their electrician installed.
I had a look at it and the supply cable which disappears under the floor at the old fuseboard only reappears in a cord pull isolator in the bathroom - maybe 5m away. the problem I have is that the load cable from the splitter is obviously 6mm T&E.
so, I = p/v 9800/230 = 42.61a
Table 4D5 allows for 47amps - clipped direct - but this cable has a way to go and I'd say that at least a third of the run is sunk in plaster and a good bit of that in a new tiling job. So replacing the supply will be messy at best - as well as expensive, and the job has just been done. I can't believe the spark would have let it run through a 30amp cartridge fuse in any case.
I know there should be some allowance given for a short load duration - but what are your thoughts?