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Plastic blanks or dummy MCB's on metal consumer units

Alan B

I have been installing quite a few fusebox consumer units recently and like the units, especially the cost effective double pole RCBO's

BUT I hate fighting with getting the metal blanks in the right place as they slide all over the place when trying to get the cover back on. I would very much like to move towards plastic blanks or plastic dummy circuit breakers.

Past posts from 2017 state that this is not allowed if metal blanks are used, just wondering what the current position is. If I need to use the metal blanks any tips on making installation easier.

Thanks

 

Alan

  • 0

    The wylex plastic blanks are listed as being suitable only for their NH range of boards, so by implication not for their current NM range of metal boards.

  • Former Community Member
    0 Former Community Member

    Info on ON-SITE Guide page 23 (d)

  • 0

    OZZY: 
     

    Info on ON-SITE Guide page 23 (d)

    Thanks Ozzy that certainly gives a clear answer to the question

  • 0

    wallywombat: 
     

    The wylex plastic blanks are listed as being suitable only for their NH range of boards, so by implication not for their current NM range of metal boards.

    i  don't know where you've found that but wylex say that they are suitable for use in NH and NM ranges. 

  • 0

    Zoomup: 
     

    Doesn't the hinged metal cover form the “fire barrier”? I fit the main consumer unit cover and then fit the blanks after. It is much easier.

    Z.

    Add: Update: Except for a Crabtree Starbreaker consumer unit where recently I came across metal blanks that had to be inserted before the cover was re-fixed, as they had to be skewed by 45 degrees to fit into the rectangular cover opening. Then when fitting the cover they slid out of position and were a right pain.

    P.P.S. Crabtree Starbreaker boards with the push in M.C.B.s are just such a great design. Work live as the bus-bar is insulated, and the breakers just plug in. No silly copper bus-bar with fingers to mess about with.

    Z.

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