Is this normal way of fitting a main isolation switch?

[Panthro83]

Had a mains isolation switch fitted (meter>dp switch>temporary cu unit) but I thought being a dp switch both live and neutral should be connected to the switch not just the live? Does anyone know why he'd have installed it this way with the separate neutral box, doesn't it defeat the point of a dp switch?

 

[Mr Mark Sparks]

welcome mate
very strange and are they single insulated brown and blue
and what size are they and what size is the main fuse?

 

[kung]

Hello and welcome also
Main fuse 100A looks like 2.5-4mm singles and dont really know why its connected this way inc cable sizing looks like hes rigged up a bypass cu (cu on a board with socket under for temp power supply to fridge/freezer etc ) as i do in properties that are empty for kettle etc on rewires/cu upgrades.
Just a thought.

 

[Panthro83]

Thanks for the replies... to clarify, the house is being rewired so a temporary socket board (protected by rcd trip switch) is being fed by the single insulated brown/blue wires. The 100A next to the dp switch is actually feeds next door (property is an old house now split in 2). The switch unit in the lower left of picture is old and disconnected, cables on right dropping from above are feeds from old cu (now disconnected). I wasn't there when it was fitted unfortunalty, to my mind it just seems an odd way of installing the switch.

Will get a better picture of the whole arrangement when I'm back at the property tomorrow.

 

[Spudnik]

Did you pay the DNO to do that?

And i think your pic is upside down.

 

[chugs76]

The 17th Regs states that a main isolator should "break" all live conductors. The switch in your pic is not fitted correctly and needs to be changed.

 

[Spudnik]

The 17th Regs states that a main isolator should "break" all live conductors. The switch in your pic is not fitted correctly and needs to be changed.

That doesnt apply to DNO isolators. If you pull the main fuse the neutral is still connected.

The one in the CU must be double pole.

 

[Mac]

It seems a bit of a weird set up.Looks like the neutral is split into that block marked with an N.

 

[gaffer]

IMO so wrong

 

[dav1980]

dont see anything wrong with it apart from being a bit untidy and the series 7 is upside down.