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Coding, basically!

whjohnson
Assume a scenario where everything else in a domestic property is satisfactory but with the following exceptions -

Consumer unit is plastic but not in an escape route.

Consumer unit is MK 16th ed split load, with single RCD protection on one side but with the mcbs replaced by RCBOs for all circuits on the other side.

No surge protection present, and all other devices function correctly.

Tails are 16mm but there a 60A fuse in the cut out - verified during a meter change recently.


So, what, if any coding should be applied? I am at a complete loss to fail it in any respect.

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  • 0
    Zoomup:

    I have seen many local cases of damage due to long sustained overvoltages when an S.P.D. probably would not have helped. Perhaps they are good for short transient overvoltages but for a long term fault I do not think so.




    I don't think anyone is claiming that type 2 SPDs are intended for anything other than for very brief (~ 10 microsec) transients of the sort generated by e.g. lighting strikes on or near the distribution system further upstream


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  • 0
    Zoomup:

    I have seen many local cases of damage due to long sustained overvoltages when an S.P.D. probably would not have helped. Perhaps they are good for short transient overvoltages but for a long term fault I do not think so.




    I don't think anyone is claiming that type 2 SPDs are intended for anything other than for very brief (~ 10 microsec) transients of the sort generated by e.g. lighting strikes on or near the distribution system further upstream


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