Another rod ?

[KEVINDOE]

Hi everyone,
doing a domestic P.I.R tomar, had a quick look on friday and noticed an external supply to an out building wich was s.w.a, feeding a garage type c.u. in a workshop, three final circuits, sockets, lights and an additional socket further up the garden supplying a pond pump also s.w.a, its a TT system and the sub main is protected by an r.c.b.o installed at the main fuse box position,
would it be wise to install an additional rod at the workshop c.u.?
I know it should have been a s type for the sub and 30ma at the workshop, thats what i would have done,
any thoughts ?

Thanks " sunburnt jem "

 

[morph]

yes a rod at shed is needed really ( unless really close)

 

[Engineer54]

On a TT system, the more rods the better!!!!

Don't drive the rod in, close to the workshop walls, that's where all the rubble is going to be!! Rubble + earth rod = bad rod to soil contact...

 

[KEVINDOE]

Thanks engineer54, looks like some footings there aswell, its a wooden stucture, ...so additional rods wouldent efect the r.c.b.o.? or am i barking up the wrong rod !?

 

[Engineer54]

Your barking up the wrong rod!! What it will do is hopefully reduce the current Ra value and more importantly help stabilise the TT system.

 

[telectrix]

you can't beat a good rodding!

 

[KEVINDOE]

lol ! talking from experience ?

 

[malcolmsanford]

Bit late in the day, but thought this might help some. I know it's the old 16th edition but it is still relevant and hope it might help


View attachment 2006_21_winter_wiring_matters_multiple_earth_electrodes_in_tt_dwelling[1].pdf

 

[KEVINDOE]

Thanks Malcolm, brill !