garage install

[Rosco22]

Got a customer that doesn't want to run a new SWA from the house as I suggested cos its a tricky run and has a 2.5 tne in place already.
I was under the impression i couldnt use this as a distribution circuit for a small DB am i right. Or can i put it on a 20rcbo in the house with a main swich 2 way DB in garage and run a 16a radial and a 6a lighting. He wants 4 double sockets a pond pump an electric door and gate plus 2 outside lights and 2 twin 5fts.
Any ideas appreciated

 

[Spoon]

I cant see a problem with you putting a 20A rcbo on the 2.5 tne as long as the cable is mechanicaly protected going from the house to the garage (if the cable is going outside the house) and the load he is intending to use is not over 20A.
How is the 2.5tne routed?

 

[telectrix]

also depends on the length of the run. over 25m and there will probably be problems with VD.

 

[drew35]

Electric door, and gate, plus lighting, and sockets, it sounds like its pushing that 2.5mm a bit. Especially when he starts up his compressor, battery chargers etc.

 

[Rosco22]

Yer that's why I thought I would get some advice as I'm tempted to turn it away unless he upgrades the cable. It's only a 12m run and the gate an door only take an amp each but the pond takes 4amps and he wants to plug in a f/f, battery charger and maybe electric drill now and again. Unless I limit it to 1 double and if he decides to plug an extension in its down to him?
It's in steel tube underground btw.

 

[Spoon]

It's in steel tube underground btw.

Is there any room left in the steel tubing for another cable? Could always double up on the 2.5mm & parallel wire....

 

[drew35]

DON'T TURN IT AWAY! If he won't pay to upgrade the cable just fuse it down at the supply, if it trips when he overloads it, he's was warned.
If its in steel conduit can you not yank new cable through using the old?
Like you say 20a RCBO, if you're feeling mean 16a!

 

[telectrix]

as above. as long as the PD is 20A, then it's his problem if he has tripping issues. you will have installed to regs.

 

[Rosco22]

Well that's cleared it up thanks. I haven't looked at weather I can get to the tube think its well buried in the house but will have a closer look when I go to do the job.

 

[dean.diy]

...closer look when I price up the job.