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Plywood backboard for BS EN61439-3 compliant consumer unit

George Frewin
Can a plywood backboard be used for mounting a BS EN61439-3 compliant consumer unit ?

The consumer unit itself is a non-combustible enclosure providing the cables are not rear entry through the plywood so I do not see an issue here but

there are mixed opinions on using such a scenario on other forums.
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    perspicacious:
    and the wall is masonry, you could fix it direct.


    You could, but what if the wall is stone and you end up with just two fixings and the CU distorted due to the uneven wall? I know you could use resin fixings and packing washers etc but what aspect of using a ply backboard wouldn't comply?




    Not really whether a ply backboard would comply or not, but whether one would be necessary in the first place.


    DNOs seem to prefer fire-retardant manufactured materials for their tackle.


    The main issue with a studding wall would be security of the fixings. Any of suitably placed noggins, battens, or a board may address that issue.

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  • 0

    perspicacious:
    and the wall is masonry, you could fix it direct.


    You could, but what if the wall is stone and you end up with just two fixings and the CU distorted due to the uneven wall? I know you could use resin fixings and packing washers etc but what aspect of using a ply backboard wouldn't comply?




    Not really whether a ply backboard would comply or not, but whether one would be necessary in the first place.


    DNOs seem to prefer fire-retardant manufactured materials for their tackle.


    The main issue with a studding wall would be security of the fixings. Any of suitably placed noggins, battens, or a board may address that issue.

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