New house - does the CU comply to the current regs

[Octopus]

So I was in a new build today - signed off 3 months ago...

No surface trunking, all cables in walls and ceilings ..... the OCPD's for circuits 1 to 3 look wrong to me

Discuss!

 

[Dave OCD]

Every single insulation resistance result 200 Megohms, except for top floor lights 20 Meg L-N, not great on brand new wiring ?!

 

[elsparko]

Every single insulation resistance result 200 Megohms, except for top floor lights 20 Meg L-N, not great on brand new wiring ?!

typo?

 

[elsparko]

Definitely not above the ceiling .....

I was wondering about the reasoning behind having "three" against the smoke alarms rather than 3

The description on cert says "fixed wiring for 3 / 4 bedroom house, 4 storey" ................ whereas its a 3 bedroom, 3 storey house!

Meow

Alan from Afflington - you've been shamed.

get the transit ready, we can bundle him into the back of a van and store him in a dry well with a copy of the reguations and guide on inspect and testing

 

[Dave OCD]

typo?

Possibly but he also has a 10mm SWA for garage supply on a B16, maybe it has a lot of insulation around it.

 

[Strima]

Possibly but he also has a 10mm SWA for garage supply on a B16, maybe it has a lot of insulation around it.

Or a very big garden...

 

[Bob Geldoff1234]

So it’s all in conduit, method B?

Method 'B' is correct for a domestic property.The additional bit after conduit is 'or in a wall'. So all channelled wires are reference 'B'.

He has got the disconnection time for the garage supply wrong at 0.4s.It should be 5 seconds.

 

[Strima]

Method 'B' is correct for a domestic property.The additional bit after conduit is 'or in a wall'. So all channelled wires are reference 'B'.

He has got the disconnection time for the garage supply wrong at 0.4s.It should be 5 seconds.

But buried in plaster is C.

 

[HandySparks]

...Alan from Afflington - you've been shamed.

Only Afflington I can find is in Dorset. Bit of a trip from you.

 

[Toneyz]

I don't think it's credible to claim that a domestic electrical installation has been designed 10 years before its construction. For big projects there is good reason for that (but not with undue delay in starting) but it would be a nonsense to claim that for a domestic and certainly with that length of time passing.

Even if it was a large housing site it is usually developed in phases and each time a phase would of been put out for each of the trades to price

 

[Octopus]

Only Afflington I can find is in Dorset. Bit of a trip from you.

Quite correct .... Affliction to Farnham ..... Not the shortest commute @ 82 miles ......

 

[Ian1981]

A new build wouldn’t have channelled wires as the cables would be clipped direct to the fabric of the building then boarded over.
If the cables have capping over them then without knowing any other installation details such as insulation in stud walks which could make it reference method 102 or even 103 , I would say method C for capping or direct clipping.
Oval conduit enclosing the cables then maybe method B.

There’s not that much difference between them in terms of ccc, life’s too short to be worrying about reference methods.

 

[polo1]

Deleted.

 

[Risteard]

A new build wouldn’t have channelled wires

They usually would here.

 

[Strima]

5 seconds if it’s feeding a second DB. 0.4 if it is a final feeding sockets. Assuming TN system.

 

[Toneyz]

Method B could be if cables down to C.U. in bit of trunking and put down as most arduous condition, in oval conduit or has classed capping as method B.
Circuits, not RCD protected maybe cables over than 50mm of surface
or capping to comply with reg 522.6.204 (iv) I can't see the other methods used.