Part P and garden sheds

[HandySparks]

Agree with the comments above.
The SWA to pond is notifiable because (a). It is a new circuit and (b). It is in a special location.
If you are only adding/extending light points in garage it is not notifiable, but if you are changing the circuit characteristics, i.e. Changing MCB rating or putting the light circuit on to an RCD protected way, (which you WILL have to do if you are extending the circuit) then yes it will be a notifiable job.

Hope this helps?

Dan

I agree with most of the above except that, if surface run, extending a circuit doesn't require an RCD to be added.

 

[Busy Bee]

thanks for all your help guys, it is appreciated.

Busy Bee

 

[Joe S]

Would you need to change the supply mcb for the garage/ shed sub-main to an RCBO and upgrade the bonding throughout the house and then upgrade the existing garage ccu to an RCD CCU and TT it?

 

[shocking_eg]

Would you need to change the supply mcb for the garage/ shed sub-main to an RCBO and upgrade the bonding throughout the house and then upgrade the existing garage ccu to an RCD CCU and TT it?

why RCD a circuit with rcbo and then fit another RCD at the garage ? the first will still trip unless its a time delay ?
I dont think you need to RCD the SWA if its been earthed correctly, ie armouring has been earthed.

otherwise any fault you get you got to go into the house to reset it which could be a pain.

just stick an 30ma RCD at the garage end

 

[Joe S]

That's what I was thinking but you still need to protect the submain though??

 

[shocking_eg]

That's what I was thinking but you still need to protect the submain though??

The submain is protected by the type of cable. As far as i know SWA is one on a few cables that you can get away without RCD protection for the cables as the earthed outer sheathing Is the protection.

 

[malcolmsanford]

The submain is protected by the type of cable. As far as i know SWA is one on a few cables that you can get away without RCD protection for the cables as the earthed outer sheathing Is the protection.

You may find that you will still need to provide additional protection to a SWA distribution circuit if you can not achieve disconnection times for the protection device, such as in the case of a TT system.

 

[Guitarist]

The submain is protected by the type of cable. As far as i know SWA is one on a few cables that you can get away without RCD protection for the cables as the earthed outer sheathing Is the protection.

Even T&E can be used as a non-RCD protected submain provided that it is installed correctly, suitable for its environment and achieves disconnection times.