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.
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.

thanks
Andy