New kitchen


I'm building an extension and planning for the kitchen units. The walls are from the original outbuilding so will have 45mm of Celotex plus plasterboard.
1.. Do the 1st fix cables get buried in the wall behind the Celotex or should I make the battens 60mm so providing a void of 25mm and the cables running between the Celotex and the plasterboard?
2.. I was in a kitchen showroom talking to the kitchen designer about the points needed for the appliances. It was a working showroom and he showed me how the point should be located inside the units. It looks like a hole is drilled in the back of a unit and the cables feed through and a socket mounted on the unit side. The adjacent appliance is then wired or simply plugged in to this point. Is this the proper way to do things?
I'm going to need a certificate to hand to building control when the wiring is completed so am I forced to employ a sparky? What can I do to keep costs down, is there anything I can do myself?
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Is it a stud wall with blocks of Celotex placed between the woodwork?

How would you like it done? http://tinyurl.com/hxu2p was covered last week.

You could ask the BCO to check your electrical work (for a fee) or try a local sparks to check and do a certificate. The electrical installation shoulkd be checked after first fix and then tested after the second fix.
Good luck
Adam
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It's a solid external wall with 45mm Celotex between timber.
Andrew.
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