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Being commercial, will it be open to public? If it is then isn't thr consensus to use FP or similar?
Discuss twin and earth cabling size for commercial buildings in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net
Yes I agree that it often can be depending on fault current and disconnection time, but it remains a poor cable choice.Hi, from Amtech cable calculations, the cpc is usually less than that you would usually use in an installation. For example, if you use singles then you would use the same size cpc as the live and neutrals, but on calculations it usually can be less. Not every case but usually
NoBeing commercial, will it be open to public? If it is then isn't thr consensus to use FP or similar?
WhatProbably Building Regs may apply if the cable is run in the cavity. Then get some polystyrene pumped in to help migration.
As stated in my post. I am not saying dont/cant use it just expressing what I consider good design and good looking installation that is robust and easily changed, shows damage immediately, is easier to fault find on etc. Putting T&E in the fabric of the building without trunking (as the OP states) clipped (?) just seems to me poor design imho that is all I am saying. As a matter of fact I am just doing a commercial in T&E as the situation necessitates it, but not my first choice by any means. The other thing about is the whole first fix, second fix is not a big thing fitting in between framers, chippies, plasterers and plumbers etc. That whole process is a lot less complex. And don't get me started with the boarders/plasterers rather than pull the light switch wire into the hall by the door they stuffed it through the other wall in the far corner of the bedroom and other things!Why not? If T&E is suitable for the job why not use it?
When I first started out it was a lot of over night shop fitting stuff and cut and shut office re-furbs. We used A LOT of LSF twin and earth and 3c or earth and lots of white and red FP cable to modift circuits.
Only when time and budget allowed did we put up galv conduit Or galv trunking work and wire in singles, which wasn't that often sadly
I am sure we could, funny thing is I have never seen it where T&E is concerned. Just loadsa cables thrown over suspended ceilings, lights and mixed with data cables all over the show. But then I have worked on conduit, galv and pvc looks immaculate virtually everytime. And I have looked above a lot of suspended ceilings.I'm pretty sure a lot of us can produce a much neater and more elegant installation with T&E
Things is usually the glav conduit installed neatly saddled up to the concrete ceiling is installed before the drop ceiling grid went up. The t&e and data wires all lashed in is thrown above the ceiling at a later date by every tom dick and harry who has worked on the siteI am sure we could, funny thing is I have never seen it where T&E is concerned. Just loadsa cables thrown over suspended ceilings, lights and mixed with data cables all over the show. But then I have worked on conduit, galv and pvc looks immaculate virtually everytime. And I have looked above a lot of suspended ceilings.
Being commercial, will it be open to public? If it is then isn't thr consensus to use FP or similar?
Clipped in a cavity, doesn't sound right. Think the installation method needs looking at a bit more closely.
Depends on the purpose of the cavity & what else will end up in there, other than a cable route. Especially an external cavity wall.Why not? What's wrong with cables being clipped in a cavity?
Depends on the purpose of the cavity & what else will end up in there, other than a cable route. Especially an external cavity wall.
Can it still be classed as clip direct. Maybe reference method G?. And if they're stud walls off the outer block work there's Surely going to be insulation.To be fair to the OP, their comments indicate partition walls and not external cavities in which it would be nigh on impossible to clip cables.
Can it still be classed as clip direct. Maybe reference method G?. And if they're stud walls off the outer block work there's Surely going to be insulation.
Still can't be classed as clipped direct. It's in a wall.OP stated internal walls with no thermal insulation.
AndStill can't be classed as clipped direct. It's in a wall.
I'd say 103. If there's an EICR done in the future they either won't have the original test to go by or they'll look at it and think who ever tested it put down the wrong classification. I do sometimes think the installation references could do with one or two more. C'est La VieThere is no exact reference method for this but I'd say clipped direct is closest.
Reply to twin and earth cabling size for commercial buildings in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net
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