ring circuit

[aberdeenpaul]

i am about to start re-wiring my house due to an extension being build. I was an electrician a few years ago so unsure about all the reg changes.
For a ring circuit i know that it has to be within 100m sq. but is there a maximum length of cable? i have concrete floors in new extension so have to drop the cables from above for the sockets so this will create longer cable runs.



please help

 

[jj4091]

All the info you require is in the wikki, but your biggest problem will be part p.

 

[DESL]

but your biggest problem will be part p.

Not in Scotland

 

[aberdeenpaul]

cannot find anything in wikki

 

[Spark123]

As with any circuit the limit will be by earth fault loop impedance or volt drop. What type of earthing have you i.e. TN-S, TN-CS, TT? What is the overcurrent protective device? Do you have an on site guide?