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IP2X inside enclosures

wallywombat
Generally these days everything live(*) inside an enclosure like a CU (accessible only with a tool yada yada) seems to be IP2X - e.g. recessed terminal screws on MCBs, busbar covers, etc.


Is there anything in BS 7671 which enforces this? Or product standards like BS EN 61439? Or is it just down to good practice by the manufacturers?


(*), well, line anyway.
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  • 0
    Interesting question!


    BS EN 61439-1:2011 8.4.2.3 gives conditions which must be satisfied when enclosures are opened. One of the choices is: "Where an intermediate barrier providing a degree of protection of at least IP XXB prevents contact with live parts, such a barrier being removable only by the use of a key or tool." Those busbar covers in consumer units seem to be able to fall off without a tool.


    BS EN 61008 and BS EN 60898 devices are to be marked with their IP rating if better than IP20. That implies that they should have IP2X protection, but I cannot find any clause which says so directly.
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  • 0
    Interesting question!


    BS EN 61439-1:2011 8.4.2.3 gives conditions which must be satisfied when enclosures are opened. One of the choices is: "Where an intermediate barrier providing a degree of protection of at least IP XXB prevents contact with live parts, such a barrier being removable only by the use of a key or tool." Those busbar covers in consumer units seem to be able to fall off without a tool.


    BS EN 61008 and BS EN 60898 devices are to be marked with their IP rating if better than IP20. That implies that they should have IP2X protection, but I cannot find any clause which says so directly.
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