Garage Power

[Sidewinder]

why dont we do the installations like tnc where its rodded and tied to neutral at the same time that way if earth goes live its ground by rod and if the rod degrades to a bad point the the neutral bonds it aswell best of both worlds or am i thinking again.

This is what we have with the TN-C side of a TN-C-S, it is combined up to the cutout, then separated.

There is nothing wrong with adding a rod at the origin of the installation, and installing multiple rods within the grounds of the property to bring down the combined rod impedance without the reliance on the external EFLI.

Thus giving you a real belt and braces option, but, it must be correctly designed and implemented.

 

[Phoenix]

Or as I saw a while ago...

4mm across the water inlet to a gents urinal header tank down to the flushing downpipe

and then another onto a yellow lug on the Stainless trough

Two installations in local authority owned sites, wired during the 15th edition days spring to mind.

1) Had a storage area above the plant/mains room. To access it, a vertical steel ladder was rawl bolted to the brickwork. Someone had decided to run a main bond back to the DB

2) Even more silly. A disabled WC had 4mm connected with ring crimps onto the fixing holes of the two disabled grab rails near the WC, this was connected to the suppimentary bonding, a couple of metal label tags from BS951 pipe clamps had been used where the crimp was on the fixing screw. I had a picture once, probably still have, but its long buried!

 

[kerching]

I employed a Scots lad many years ago.

his Clerk of Works in Glasgow insisted on having 4" of 6mm and two ring crimps across every joint in metal capping