concealed cables to D.B.

[jonallcock]

Hi All..

Situation: Full rewire of a house, The distribution board is located in the garrage on the adjacent wall back to back with the house.. The roof level of the garage is below the ceiling of the joists so can't break threw at high level

It's my intention to run the cables down/up the internal wall and punch threw into the back of the garage D.B..

Question: The cables are not in ' permitted cable routes' as per the regs fig 3 (150mm ruling) .. I was going to sink the cables and plate over with one 3/4mm Steel and earth it as a means of mechanical protection..

all circuit RCD protected..

Doing the above I must meet the requirement below:

522.6.6 A cable concealed in a wall or partition at a depth of less than 50 mm from a surface of the wall or partition shall: (i) incorporate an earthed metallic covering which complies with the requirements of these
be mechanically protected against damage sufficient to prevent penetration of the cable by nails, screws and the like,

Any thoughts ??

Jon

 

[Toneyz]

I think that you have 2 options 1.down internal wall and through this will mean (taking that all circuits are RCD protected)in safe zone formed by socket etc/metal plate or 2.down through cavity this method you would have to overcome (a)sharp edges eg damage to cable put in duct (b)water penertration between cavity well the cable/duct is falling away from the iner leaf wall (c) fire stopping building regs aply. just mt thoughts for a solution.