Sirapite was IMO way too hard for a plaster but was used through the first half of the 20th C. You can't cut it (or Parian) with a Stanley knife. It's a bastard to drill using a masonry drill.
I'm afraid I don't follow...you mean you want to cut through the plaster, through the brick and have the chasing an inch or more deep? - what for?
almost all plaster is deep enough to hold a cable and a clip
I can't understand the fascination WRT trunking, I've never seen this used in domestic properties
Phil L coughed up some electrons that declared:
Possibility to rethread cable? Maybe not so important with mains, but *very* useful with ELV/comms drops, especially if you don't know what you want to put in them at first (or second) fix time :)
I've found that 16mm oval which is barely much thicker than T+E will take
2.5mm2 T+E or upto 2 typical comms cables, including TV type coax.BTW - I'm installing a perimeter roof run of 200x30mm + 100x60mm wire basket in my house - bet you've never seen that done ;->
Cheers
Tim
All houses I've done anything with have been initially wired with capping, and that's made rewiring very easy (only on one occation could I not pull though the new cable, or rather, pull out the old cable).
I almost always use oval trunking when chasing new runs.
You can get 12.5mm oval, which will take a triple and earth, and probably also a 2.5mm T&E. I also use for Cat 5e.
Ah, mice runs ;-)
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