Overhead submain connection

[kevyn]

Hi all,

I have been asked to wire a small 2 bay cow shed in time for the dark nights coming in. Supply comes from a 2 wire overhead which is supplying the adjacent shed in a 2.5mm 6242Y (overhaed on bracket on my cow shed). No chance of connecting to the other shed as it is too far away. In my shed it will only be supplying two single anti corrosive flourescents and a socket. Overhead protected by a switch fuse down in main farm building dont know the rating though.

What do I connect up my shed with bearing in mind I will have to connect to the overhead?

 

[malcolmsanford]

The supply from the farm you say is a 2 core from the main switch fuse from the farm house. Then there is a T+E connected onto this 2 core to another shed ?

I'm assuming then that the system is a TT system. As i'm assuming the earth part of the T+E is connected.
You will need to know a few things ,

size of the overhead cables in mm^,
protection device and rating for those overheads,
length of run of the overheads,
how far is the shed from the existing supply.
Is the existing PVC T+E suitable for the enviroment it is in,
If your running sockets you will need a 30mA RCD for protection if your sockets are rated less that 32a.