consumer unit in workshop

[bikerm4]

I have a brick built workshop at the rear of my house which has a 4mm t/e cable feeding the electrics from the consumer unit in my house. the 4mm cable has a run of about 10metres and is protected by a 30 amp wired fuse. In the workshop there are 2 65w fluorescent lights and 1 double socket. The 4mm cable terminates in a large 60 amp junction box and the lighting and socket wires are connected via this box. Do i need a seperate consumer unit in the workshop with fuses for the lights and socket? Thanks.

 

[Spark123]

What size fuse is protecting the lights, the 30A? If so then yes, you need to have a suitable sized protective device installed for the lights, is the socket RCD protected? What size cables are used for lights and sockets?
A CU may be the preferable option, installing a consumer unit is notifiable under part p of the building regs.

 

[davelx]

And when protected by a rewireable fuse, the max current rating of 4mm is 26.8A, so a 30A fuse is too big. Either the next size fuse down is needed, or the cable needs to be increased to 6mm

 

[bikerm4]

Thanks for the input, i will get a spark to upgrade it for me.