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  • Very nice that Soul, good job.

    Can anyone advise me on my fusebox?

    I've finally worked out where all the wires go, then created this high quality diagram in Paint:

    The one marked as cellar wasn't actually going anywhere, I think it was powering an old electric shower in the bathroom, so I've appropriated it to power some plugs in the cellar.

    The boiler and oven are both gas, so I'm not really concerned about those, as all they are really powering is the wattage to ingnite the gas.

    The cellar and the ring main are the ones I'm concerned about. I've called it the ring, as in ring final, but I can't find a wire returning to the fusebox. The same for the cellar fuse. The cellar cable is a big thick cable, I would guess 4mm². The 'ring' is definitely 2.5mm².

    If the 'ring' is actually radial, I believe it should be fused with a 20A fuse, not a 30A. Same for the cellar.

    This would make sense, as the fusebox is rated for 60A, so it's currently overloaded, at least in theory. 20A for each would be fine as I won't be running more than 3840W off each (based on W = A x V - 20%).

    Could these both really be radial? Could I be missing something? The fusebox is on the wall in the hall high up, with the wires running down through some conduit and into the cellar. If there are return wires, surely they wouldn't be run through the ceiling or through the wall, would they?

    So if I am right and they are radial then my actions should presumably be:

    • Replace 30A fuses with 20A ASAP
    • Consider having 'ring' and cellar circuits turned into ring finals
    • Consider replacing my fusebox with one of those modern 100A 'consumer unit' things, although there be dragons because I'll need a sparky presumably and our old 60A job is mounted on asbestos :/


    Make sense?

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