Capping - Yes / No

[sparkyork]

i pulled some old cables out of another job in leeds a while back it was in the ceiling voids pinned to the joists. it was like a dual compartment mini wooden trucking.

clout nails or ok with capping so long as its breeze block!

how does dri wall adhesive do then does that react over time with a cable??

rich

 

[stevie h]

i pulled some old cables out of another job in leeds a while back it was in the ceiling voids pinned to the joists. it was like a dual compartment mini wooden trucking.

clout nails or ok with capping so long as its breeze block!

how does dri wall adhesive do then does that react over time with a cable??

rich

That is sort of why plastic capping was used , when the plasters used to sand and cement walls the lime in the cement would eat away at the cabling over time ..

 

[LukeScotty]

what bout earthed, metal capping. is that allowed instead of conduit in the 17th ?

 

[Spudmiester]

i pulled some old cables out of another job in leeds a while back it was in the ceiling voids pinned to the joists. it was like a dual compartment mini wooden trucking.


Cripes that is old ! Its called Casing & Capping.

Pulled a load of it out of a spot in Bradford a few years back !

 

[dixon9]

Just so that I can get this straight:

IF the cable(s) are in the 150mm zones, or verticle of horizontal from switches/jb´s AND have RCD protection THEN they do not need physical protection???

Interesting point above on capping helping to prevent corrosion of cables by the plaster - cheap, flex conduit would serve in that case?

 

[jimes]

was meant to offer help in rewire situation aswell and it has helped me on the odd switch drop and where some numpty put a picture hook through the ring!.....I hate the stuff though!

 

[Dinosaur]

My take on the capping issue is that it is NOT to be used for mechanical protection UNLESS it can withstand penetration from a nail, screw or similar! If it used as mechanical protection and is metal it must be Earthed.

 

[Carter]

...it was like a dual compartment mini wooden trunking.

rich

Come across this stuff occasionally, two channels for VIR singles rebated into a cedar lath (smells lovely) with a moulded tack on cover strip.

Was there ever a product more perfectly designed specificaly to razor your fingertips off when it snags on a van floor as you slide it in? lethal stuff. Generally treat it as an 'aid to installation' rather than as mech protection. Having said that you can get a couple of grades ranging from one stage better than tracing paper to proper heavy guage which has to be pre-punched with a masonry nail because it's too thick for a clout to penetrate.
Have even resorted to drilling the wall and sinking plugs for the clouts in some really difficult fixing situations such as old victorian buildings where it looks like any hefty application of the hammer would dislodge brickwork.