ac1951 coughed up some electrons that declared:

On Jan 28, 12:29*am, Tim S wrote:
ac1951 coughed up some electrons that declared:



Going to replace the tails as follows;-
Drill through wall immediatly below the CU then run the new tails
through the wall and down to the Meter box enclosed in trunking. The
Service supply (overhead cables) also run down the same wall
Comments ?

Without seeing it and being able to see the minutae, I could only offer a
couple of things to watch out for:

Do you have cavity walls that *may* contain polystyrene insulation? This
can eat PVC (meter tails). If at all possible, unless your sure of the
cavity (if any) contents, it might be worth trying to let a couple of
bits if uPVC or polythene (PET) pipe[1] in to sleeve the holes and pass
the cables through those. It's only the polystyrene issue: double
insulated tails are otherwise tough enough to pass through masonry (and
often do).

[1] Don't use metal tube if passing the conductors through separate pipes
[-
problems with eddy currents and magnetic effects.

Unless the top of the meter box is well shielded from rain, it might be
preferable to come down by the side of the box in the trunking and in
through the side of the box - prevents any possibility of water ingress
dripping onto live parts. If impractical, consider sealing the trunking
well.

Please do watch this space: if I've said any beaulochs, someone will be
sure to correct it soon

HTH

Tim

Just a 9" solid wall no cavity.

Then I don't think you have any problems with your idea. A bit of sleeving
is always good as it helps protect the cable from dislodged masonry lumps,
but I don't think I've ever seen the "boards" bother. The only regs
pertinent are good workmanship and that the cable be installed in a method
suitable for the cable. Clean hole(s) that the cable isn't snagging or
squashed in should be fine. The outer sheath is pretty tough.

The house is a terraced property with an entry running between it and
the nieghbours. The meter box is in the entry and hence protected from
the rain and weather. That said, the most convientant access into the
box is through the side not the top.

Any way that seems reasonable then - though don't overlook the possibility
of driving rain or kids with a hose The "boards" would usually specify
bottom or back exit, but I've seen side and top done where the box was
sheltered.

Cheers

Tim