info
Google Groups no longer supports new Usenet posts or subscriptions. Historical content remains viewable.
Dismiss
Earth Rods
8 views
Skip to first unread message
rick
Jul 25, 2022, 12:51:29 PM7/25/22
to
2 parts to an earth rod Q.
On advice on another thread - I need to install an Earth rod when a new
TT circuit is installed.
What size rod do I need ? Looking at some of the the information I have
it seems to be that an 8' rod is needed ? ..... how is this achieved if
you use for example the standard TLC 2/8" (9mm) rod which is only 1.2m
long ?
It has no threaded section so you can't join them together like you can
with 5/8" rod
Or is 4' (1.2m) long enough for domestic install ?
The 2nd part is where every post I have found gives a different answer -
the protective earth cable from the rod (in its inspection box) will be
6491X single cored green/yellow PVC insulated, and carried in flexible
conduit to the termination point about 2m in total. So at no time is it
in contact with the ground though for about 1m the flexible conduit is
buried, as it routes to the termination point.
I see cable size stated from 2.5 to 16 mm2
The TT circuit it is protecting is 6mm2 32A (via SWA underground cable)
RCD protected
What is the correct size earthing conductor to use ?
Or as some time in future there may be a need to export PME ... should I
use 10mm ?
On advice on another thread - I need to install an Earth rod when a new
TT circuit is installed.
What size rod do I need ? Looking at some of the the information I have
it seems to be that an 8' rod is needed ? ..... how is this achieved if
you use for example the standard TLC 2/8" (9mm) rod which is only 1.2m
long ?
It has no threaded section so you can't join them together like you can
with 5/8" rod
Or is 4' (1.2m) long enough for domestic install ?
The 2nd part is where every post I have found gives a different answer -
the protective earth cable from the rod (in its inspection box) will be
6491X single cored green/yellow PVC insulated, and carried in flexible
conduit to the termination point about 2m in total. So at no time is it
in contact with the ground though for about 1m the flexible conduit is
buried, as it routes to the termination point.
I see cable size stated from 2.5 to 16 mm2
The TT circuit it is protecting is 6mm2 32A (via SWA underground cable)
RCD protected
What is the correct size earthing conductor to use ?
Or as some time in future there may be a need to export PME ... should I
use 10mm ?
0 new messages