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Shower with no RCD or supplementary bonding

MrJack96

I have been round to a relatives flat and seen he has an old Wylex board with MCBs. His bathroom has no supplementary bonding from what I can see and no RCD protection for his electric shower. how potentially dangerous is this? I know the circuits are fairly short and can see main bonding in place Can only really think if the R2 values are low enough touch voltages should end up being kept low? 

 

 

 

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    MrJack96: 
     

    So just to clear this up a shower with no RCD and supplementary bonding is safe until we then have a fault …

    Yes, in general terms, if all the wiring is sound, it is safe until something goes wrong.

    Think of a shallow cable without RCD protection. It is all perfectly safe until somebody bangs in a nail. Even then, it depends upon what you hit first. The danger is pinging the line conductor, so now you have a circuit through L, the nail, finger & thumb, down to ground. That may just give you a nasty belt, but if you happen to be in the bollocky-buff with wet feet, or holding on to something like a radiator, it may be worse.

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    MrJack96: 
     

    So just to clear this up a shower with no RCD and supplementary bonding is safe until we then have a fault …

    Yes, in general terms, if all the wiring is sound, it is safe until something goes wrong.

    Think of a shallow cable without RCD protection. It is all perfectly safe until somebody bangs in a nail. Even then, it depends upon what you hit first. The danger is pinging the line conductor, so now you have a circuit through L, the nail, finger & thumb, down to ground. That may just give you a nasty belt, but if you happen to be in the bollocky-buff with wet feet, or holding on to something like a radiator, it may be worse.

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