Securing cables & trunking to prevent premature collapse.

[Midwest]

Just wondering how your guys observe the reg, for preventing premature collapse of cables in plastic trunking, when securing to plasterboard, i.e. dry lined or plasterboard stud walls?

We’re having some additional fire alarm work carried out, and they mention some ‘clips’ to comply. I was wondering what the clips screw into, plastic raw plugs? Would that be compliant.

 

[Pretty Mouth]

For mini trunking I screw into joist/stud where possible, or dewalt walldogs direct into plasterboard where not. Screw through a bit of all round band and wrap around cable within trunking

 

[Midwest]

Will the wall dogs stay in the plasterboard on their own?

 

[SparkyChick]

Will the wall dogs stay in the plasterboard on their own?

Yes, they just screw straight in.

I use D-Line (I think) fire straps, all round band and Schneider do a range of metal T+E clips which is use every third clip or so.

 

[westward10]

If you are having fire alarm work carried out cables should not only be fixed to prevent premature collapse but also that they remain in place so the system still operates. With FP200 this would be to use support suggested by the manufacturer.

 

[Midwest]

If you are having fire alarm work carried out cables should not only be fixed to prevent premature collapse but also that they remain in place so the system still operates. With FP200 this would be to use support suggested by the manufacturer.

Yep not sure exactly what cable it is, but think they mentioned FP2000. It’s Chubb, so confident they’ll do it properly.
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Yes, they just screw straight in.

I use D-Line (I think) fire straps, all round band and Schneider do a range of metal T+E clips which is use every third clip or so.

I’ll have to get some to try myself. Surprised they’ll hold in plasterboard by themselves.

 

[westward10]

BS5839:1 quoted fixing of cables to prevent collapse in the event of a fire long before BS7671 and for different reasons. To maintain the system as opposed to persons being tangled in collapsed cables.

 

[Pretty Mouth]

Will the wall dogs stay in the plasterboard on their own?

It's about the only use I've found for them as yet, though they only give a lightweight fixing. If you have any doubts that they'll hold the weight, then it's Fischer cavity fixings.
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?
Why the dislike midwest?!

 

[Midwest]

Ooopps sorry, fat fingers.

 

[SparkyChick]

It's about the only use I've found for them as yet, though they only give a lightweight fixing. If you have any doubts that they'll hold the weight, then it's Fischer cavity fixings.

Problem I have with them is I think they need a 4.5mm hole to work well in say brick/concrete/block. They have got me out of some tight spots with fixing in the bubbly super soft blocks... a liberal application of them screwed straight into the block can give a surprisingly secure fixing.

 

[Pretty Mouth]

Problem I have with them is I think they need a 4.5mm hole to work well in say brick/concrete/block. They have got me out of some tight spots with fixing in the bubbly super soft blocks... a liberal application of them screwed straight into the block can give a surprisingly secure fixing.

Aha, so they do have another use!

For brick and block, there's a couple of things I found work well, if you don't want to use plastic plugs. Drill and plug with a 6mm wooden dowell, then just screw or nail the clip into the dowell. Gives a solid fixing, but obviously indoor only. Another option is drill a 4mm hole, then screw direct into the hole with a 5mm screw (can also do a 3mm hole with 4mm screw).

For those super soft aerated blocks, you can just hammer the 6mm dowells straight in without having to drill a hole.

 

[AJshep]

I just use plasterboard fixings ( with the metal worms) to fix into plasterboard. If I'm using plastic trunking with D-line clips that fit inside the trunking, Wall dogs if it's a single cable or a p-clip as you see the worm.
Wall dogs are brilliant in block as sparkychick said.

 

[Dustydazzler]

I’m surprised one of the clip manufacturer hasn’t made a wall dog type metal buckle clip yet. Just screwinto the wall and lay the cable in place and fasten the buckle. No need for a separate clip...

 

[richy3333]

Wall dogs or Linian clips

 

[Midwest]

Do the Linian clips work, just in plasterboard?