Knocking down extension with power

[Jack07]

Hi,

Im about to start knocking down an extension to start on the new extension.

There is power to the current extension and i wanted to know:
1- the safest way to terminate the wires
2- If I am allowed to carry out the work or does it fall under the regs?

The terminated ends will be on the outsside of an external wall for the duration of the new build.

Thanks
Jack

 

[Chri5]

It not that simple.

Say you cut a ring circuit, you end up with two live ends and two radials workking on 32 amp mcb. Radials for 2.5mm TE are rated at 25 amps, and normally fused via a 20 amp MCB.

You also have exposed live cables in a external enviroment, you also have a bunch of contractors who could sue if anything daft happens.

Since you will have to use a spark to certify the new extension wiring, could you not get them along now to:-

Break and re make (and make safe) existing circuits that need to be temp moved.

Cover any requirements for contactor machines in the new extension location.

Plaln routes for new cabling so you / the contractors have a schedule for new electrical stuff- extended ring main. lighting and main smoke alarms (if required). You could also add in TV, Sky, data, alarms etc.

 

[ban-all-sheds]

2- If I am allowed to carry out the work or does it fall under the regs?

The two are not exclusive.

Yes you are allowed and yes is is within the scope of the regulations.

 

[plugwash]

For terminating the wiring assuming the terminations were indoors i'd probablly use junction boxes

As others have said you may need to run temporary cabling to rejoin rings, if you need to do this then make sure you run it in a way that it is unlikely to be damaged.

Finally this work is likely to be notifiable under part P (part P works be defining what is NOT notifable) and since you are building an extension building control are presumablly already involved, what if anything did you say to them about how you planned to comply with part P.

 

[ban-all-sheds]

Finally this work is likely to be notifiable under part P (part P works be defining what is NOT notifable)

Part P has ABSOLUTELY NOTHING to do with Part 3. The only connection is that they are both parts of the Building Regulations which apply to some or all electrical work, but the requirements in each are completely unrelated.