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Cable support requirements in 18th edition
In the DIY FAQ it says:-
There are new requirements for all wiring support to not fail as a result of fire (i.e. this no longer just in escape routes). So cables supported in plastic trunking or in plastic conduit will also need additional metal clips. Does this mean that metal clips are required in *all* plastic trunking or only where the wire can fall out? I.e. does trunking running along the floor or on a rafter/ceiling require metal clips? It does make using trunking a bit of a pain and self-adhesive trunking becomes pretty useless as you still have to knock nails or screw screws through it. Apart from the D-Line clips no one seems to be producing hardware to provide this cable support, are there any well thought out systems available that provide the required support, are easy to install and look reasonable? -- Chris Green · |
Cable support requirements in 18th edition
On Tuesday, 15 December 2020 at 15:33:07 UTC, Chris Green wrote:
In the DIY FAQ it says:- There are new requirements for all wiring support to not fail as a result of fire (i.e. this no longer just in escape routes). So cables supported in plastic trunking or in plastic conduit will also need additional metal clips. Does this mean that metal clips are required in *all* plastic trunking or only where the wire can fall out? I.e. does trunking running along the floor or on a rafter/ceiling require metal clips? It does make using trunking a bit of a pain and self-adhesive trunking becomes pretty useless as you still have to knock nails or screw screws through it. Apart from the D-Line clips no one seems to be producing hardware to provide this cable support, are there any well thought out systems available that provide the required support, are easy to install and look reasonable? I recently installed a length of SWA outdoors. I cut short sections of steel band and moulded them inside the cleat - and then put the fixing screw through the whole lot. Not all of them, just at sufficient intervals to prevent it causing problems in a fire. Got the idea of doing that from another forum. My point being that I couldn't find any other good way of doing it. Haven't got round to all the indoor cabling that needs doing, but all I've seen so far is some rather pricey cable clips - https://www.tlc-direct.co.uk/Products/TCFC1.html - I presume that if a cable runs through the middle of a joist it doesn't need protecting (what would you clip it to if the joist is burned through!). Similarly running a cable in a vertical chase seems pretty low risk. If people think differently, then I'm surprised there isn't more choice of protection available. |
Cable support requirements in 18th edition
On 15/12/2020 16:27, Ben Blaukopf wrote:
On Tuesday, 15 December 2020 at 15:33:07 UTC, Chris Green wrote: In the DIY FAQ it says:- There are new requirements for all wiring support to not fail as a result of fire (i.e. this no longer just in escape routes). So cables supported in plastic trunking or in plastic conduit will also need additional metal clips. Does this mean that metal clips are required in *all* plastic trunking or only where the wire can fall out? I.e. does trunking running along the floor or on a rafter/ceiling require metal clips? It does make using trunking a bit of a pain and self-adhesive trunking becomes pretty useless as you still have to knock nails or screw screws through it. Apart from the D-Line clips no one seems to be producing hardware to provide this cable support, are there any well thought out systems available that provide the required support, are easy to install and look reasonable? I recently installed a length of SWA outdoors. I cut short sections of steel band and moulded them inside the cleat - and then put the fixing screw through the whole lot. Not all of them, just at sufficient intervals to prevent it causing problems in a fire. Got the idea of doing that from another forum. My point being that I couldn't find any other good way of doing it. metal cable cleats for SWA? Eg https://www.yourelectrics.com/product-category/cable-accessories/metal-swa-cleats-18th-edition/ -- Robin reply-to address is (intended to be) valid |
Cable support requirements in 18th edition
On 15/12/2020 15:19, Chris Green wrote:
In the DIY FAQ it says:- There are new requirements for all wiring support to not fail as a result of fire (i.e. this no longer just in escape routes). So cables supported in plastic trunking or in plastic conduit will also need additional metal clips. Does this mean that metal clips are required in *all* plastic trunking or only where the wire can fall out? I.e. does trunking running along the floor or on a rafter/ceiling require metal clips? Anywhere that failure of the support from the trunking could cause an entanglement hazard... So that would be vertical horizontal runs on walls or overhead certainly. IMO whether that also applies on floors will depend on circumstances. It does make using trunking a bit of a pain and self-adhesive trunking becomes pretty useless as you still have to knock nails or screw screws through it. Apart from the D-Line clips no one seems to be producing hardware to provide this cable support, are there any well thought out systems available that provide the required support, are easy to install and look reasonable? Lots of places seem to have: https://www.fireflycableclips.com/ A demo of how these are used he https://www.youtube.com/watch?v=LpFOtdmnyoc TLC carry: https://www.tlc-direct.co.uk/Main_In...IPS/index.html -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ |
Cable support requirements in 18th edition
John Rumm wrote:
On 15/12/2020 15:19, Chris Green wrote: In the DIY FAQ it says:- There are new requirements for all wiring support to not fail as a result of fire (i.e. this no longer just in escape routes). So cables supported in plastic trunking or in plastic conduit will also need additional metal clips. Does this mean that metal clips are required in *all* plastic trunking or only where the wire can fall out? I.e. does trunking running along the floor or on a rafter/ceiling require metal clips? Anywhere that failure of the support from the trunking could cause an entanglement hazard... So that would be vertical horizontal runs on walls or overhead certainly. IMO whether that also applies on floors will depend on circumstances. It does make using trunking a bit of a pain and self-adhesive trunking becomes pretty useless as you still have to knock nails or screw screws through it. Apart from the D-Line clips no one seems to be producing hardware to provide this cable support, are there any well thought out systems available that provide the required support, are easy to install and look reasonable? Lots of places seem to have: https://www.fireflycableclips.com/ They're OK but have the same problem as anything else mounted inside the conduit, you have to drill and fix the clip before putting the cables in. The above do have the significant advantage of making it fairly easy (by the look of it) to get cables in and out after fixing the clip. Also, can you get them for all sizes of mini-trunking, in particular the small sizes. A demo of how these are used he https://www.youtube.com/watch?v=LpFOtdmnyoc TLC carry: https://www.tlc-direct.co.uk/Main_In...IPS/index.html Yes, they're the ones I referred to, lots of people sell them but it's not very clear how they work. -- Chris Green · |
Cable support requirements in 18th edition
Chris Green wrote:
Lots of places seem to have: https://www.fireflycableclips.com/ They're OK but have the same problem as anything else mounted inside the conduit, you have to drill and fix the clip before putting the cables in. The above do have the significant advantage of making it fairly easy (by the look of it) to get cables in and out after fixing the clip. Also, can you get them for all sizes of mini-trunking, in particular the small sizes. They seem quite expensive too:- https://www.cef.co.uk/catalogue/prod...astic-trunking -- Chris Green · |
Cable support requirements in 18th edition
On Tuesday, 15 December 2020 at 19:48:07 UTC, Chris Green wrote:
John Rumm wrote: On 15/12/2020 15:19, Chris Green wrote: In the DIY FAQ it says:- There are new requirements for all wiring support to not fail as a result of fire (i.e. this no longer just in escape routes). So cables supported in plastic trunking or in plastic conduit will also need additional metal clips. Does this mean that metal clips are required in *all* plastic trunking or only where the wire can fall out? I.e. does trunking running along the floor or on a rafter/ceiling require metal clips? Anywhere that failure of the support from the trunking could cause an entanglement hazard... So that would be vertical horizontal runs on walls or overhead certainly. IMO whether that also applies on floors will depend on circumstances. It does make using trunking a bit of a pain and self-adhesive trunking becomes pretty useless as you still have to knock nails or screw screws through it. Apart from the D-Line clips no one seems to be producing hardware to provide this cable support, are there any well thought out systems available that provide the required support, are easy to install and look reasonable? Lots of places seem to have: https://www.fireflycableclips.com/ They're OK but have the same problem as anything else mounted inside the conduit, you have to drill and fix the clip before putting the cables in. The above do have the significant advantage of making it fairly easy (by the look of it) to get cables in and out after fixing the clip. Also, can you get them for all sizes of mini-trunking, in particular the small sizes. A demo of how these are used he https://www.youtube.com/watch?v=LpFOtdmnyoc TLC carry: https://www.tlc-direct.co.uk/Main_In...IPS/index.html Yes, they're the ones I referred to, lots of people sell them but it's not very clear how they work. -- Chris Green · The D line trunking clips are fine but you need to use the correct trunking, for instance Tower trunking is incompatible as it has a ridge down the centre to enable a divider to be clipped on just where the screw needs to go. I made the mistake of using it and ended splitting the D line clips and used two screws instead of one it was a real PITA. RICHARD |
Cable support requirements in 18th edition
In article ,
Brian Gaff wrote: The problem when I hear this sort of thing is that cables are mostly insulated by pvc, so what is the point anyway? The moment the pace melts, the conductors shour out and kill the power, surely? Brian But, the wires are still there. A fireman got trapped by drooping wires and died. -- from KT24 in Surrey, England "I'd rather die of exhaustion than die of boredom" Thomas Carlyle |
Cable support requirements in 18th edition
On 16/12/2020 15:55, Brian Gaff wrote:
The problem when I hear this sort of thing is that cables are mostly insulated by pvc, so what is the point anyway? The moment the pace melts, the conductors shour out and kill the power, surely? Its nothing to do with shock risk, just entanglement risk. -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ |
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