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The Value of R.C.D.s

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There have been many discussions recently about R.C.D.s, whether they really are necessary, and is an installation necessarily unsafe if it is old and has no, or insufficient, R.C.D. protection.

 

Well consider this please. If you are driving and need to brake hard to save somebody from injury or death does that incident ever get reported. If you knocked somebody over due to having bad vehicle brakes then it might.

 

If an R.C.D. operates correctly and saves somebody from injury or death, does that every get reported? There may have been 10s, 100s or even thousands of cases where an R.C.D. has saved somebody from injury or death, but we will never know the numbers because of a lack of reporting of the cases.

 

Personally I like the idea of R.C.D. protection

 

Z.

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    Colin Haggett: 
     

    Maybe because it’s not good practice to always put a single RCD on the supply to a consumer unit? 

    Is a single RCD for an entire home considered acceptable anyway? Regulation 531.3.2. Often standing “leakage current” of between 4 and 10 mA, but when appliances are switched on, a single RCD is likely to operate frequently. 

    However, a split-load board with 2 RCDs would be OK for most domestic installations.

    I would hope most electricians would follow the guidance of GN1 on reg 314.1 on selection of types of RCD. 

    I guess this is the same point.

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  • 0

    Colin Haggett: 
     

    Maybe because it’s not good practice to always put a single RCD on the supply to a consumer unit? 

    Is a single RCD for an entire home considered acceptable anyway? Regulation 531.3.2. Often standing “leakage current” of between 4 and 10 mA, but when appliances are switched on, a single RCD is likely to operate frequently. 

    However, a split-load board with 2 RCDs would be OK for most domestic installations.

    I would hope most electricians would follow the guidance of GN1 on reg 314.1 on selection of types of RCD. 

    I guess this is the same point.

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