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Caravan Park

Grobbyman
I have to replace 6 pitch boxes on a touring van caravan  site.

So six pitch boxes with 4 van hookup points per box, each hookup point protected by a 10A 30mA RCCB.

Unfortunately I've also discovered that the site is wired as a ring in 6mm SWA, buried direct in ground.


Any thoughts on max fuse size to protect a 6mm ring?


Regards

George
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    ebee:

    Given the (theoretically possible) 7% RCD failure rate and the theoretical 95% successfull life saving ability of RCDs the I prefer the (ideally but not reality very theoretical) improved rate two cascaded RCDs might achieve - especially in differing locations (possibly differing "Stiction" risks).




    So are you saying that if you pick up an exposed line conductor and the RCD trips, you still have a 5% chance of death?

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  • 0

    ebee:

    Given the (theoretically possible) 7% RCD failure rate and the theoretical 95% successfull life saving ability of RCDs the I prefer the (ideally but not reality very theoretical) improved rate two cascaded RCDs might achieve - especially in differing locations (possibly differing "Stiction" risks).




    So are you saying that if you pick up an exposed line conductor and the RCD trips, you still have a 5% chance of death?

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