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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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    Looks like fire retardant hardwood faced plywood (18mm) is going to be the better (safer) option here and hopefully keep the DNO happy.



    DNO supply and fit their own board for their equipment. If its in a cellar, the main worry is that it is rot proof.  Your consumer unit [DB] should not go on a "DNO board" , that is, share the same board as the cutout and meter are on [unless they give permission].


    I doubt they would care what your DB was mounted on, so long as it was not on their board.


    When I fit a wood contraption for ease of fitting a DB or CU, my main concern would be to ensure the wood is fairly rot proof. Marine ply does the job.
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  • 0

    Looks like fire retardant hardwood faced plywood (18mm) is going to be the better (safer) option here and hopefully keep the DNO happy.



    DNO supply and fit their own board for their equipment. If its in a cellar, the main worry is that it is rot proof.  Your consumer unit [DB] should not go on a "DNO board" , that is, share the same board as the cutout and meter are on [unless they give permission].


    I doubt they would care what your DB was mounted on, so long as it was not on their board.


    When I fit a wood contraption for ease of fitting a DB or CU, my main concern would be to ensure the wood is fairly rot proof. Marine ply does the job.
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