Drawing through replacement cable with the old one... Good or bad?

[DNS1]

Very curious about this one.

Most sparks I know use this method for rewires, whether the cable run is under a floor or down a wall cavity, but is it actually compliant with the current regs?

The regs say that cables must be supported for their full length. Does "lying on the ground below the floorboards" constitute being "supported". Equally, does resting on the notches in joists?

Got a job coming up fairly soon involving replacing a load of 50s wiring in a terraced house, much of which is run under the floorboards. Short of pulling up the entire floor and nailing my cables every 30cm I'm not sure how is best to proceed.

I know realistically I could use the old method and no-one would be any the wiser, just wanted to at least "consider" doing everything 100% by the book!

 

[Plonker 3]

Ahh now thats why you need folk ti move out when doing a rewire in a occupied house.

Seriously though, do what is reasonably practicle for the job.

Sent from my GT-I9300 using Tapatalk 2

 

[dagrat]

I think it's just common sense really, if you can get under the floor to clip the cable then all well and good. But if not then don't worry too much as long as the cable is not submerged! Possibly over thinking it here.
and definitely use existing cable as pull wire if you can.

 

[Guest55]

if the subfloor under the joists is dry i dont see a problem in the cable resting on the ground.

 

[Octopus]

The problem is that the regs are written around new builds and /or extensions.

Just imagine the size of the OSG or the regs if they catered fo every eventuality!!

 

[Engineer54]

The regs say that cables must be supported for their full length. Does "lying on the ground below the floorboards" constitute being "supported". Equally, does resting on the notches in joists?

Do you actually worry about numby stuff like this??

I had to read your post twice, i couldn't believe what i was reading ...lol!!

I wonder if doing everything 100% by the book, has ever been achieved on a complete installation, New build or on a rewire etc... ?? wouldn't mind betting it hasn't!! lol!!

 

[Guitarist]

Basically, if it's a new build and all accessible, then no excuse for supporting along full length. If it's a rewire, then you do what is reasonably practicable. Let's face it, a length of 2.5mm T&E has to be unsupported for quite a length before its own weight will damage it, so resting on a ceiling where you can't reach to clip it is neither here nor there.

 

[Quinnysparks]

What ever works. Sling it in and get the kettle on

 

[Guitarist]

Do you actually worry about numby stuff like this??

I had to read your post twice, i couldn't believe what i was reading ...lol!!

I wonder if doing everything 100% by the book, has ever been achieved on a complete installation, New build or on a rewire etc... ?? wouldn't mind betting it hasn't!! lol!!

I don't think you should be so scathing, Eng. We are all getting bombarded with media hype about how such and such didn't comply with regulation x,y,z and was taken to court and fined, let alone how insurance Companies are refusing to pay out because an installer didn't follow a certain procedure, that people are just trying to comply with things to the letter these days in a domestic situation.
I think that it's a valid point to ask such a question, when DIY Fred drills through the ceiling into a cable which "should have been clipped to a joist", and says it's not his fault. I don't like it, but the world is getting stupid.

 

[ayjay]

i think that young lads with no experience of rewiring old property go by these regulation books far too much the people who write them are idiots
theres no way that anyone can clip cables under a floor in a old property

 

[ezzzekiel]

unless you have clerk works on last job, existing 20mm conduit for switch drops had to be chopped out as drawing in new cables can cause damage - go figure

 

[Engineer54]

I don't think you should be so scathing, Eng. We are all getting bombarded with media hype about how such and such didn't comply with regulation x,y,z and was taken to court and fined, let alone how insurance Companies are refusing to pay out because an installer didn't follow a certain procedure, that people are just trying to comply with things to the letter these days in a domestic situation.
I think that it's a valid point to ask such a question, when DIY Fred drills through the ceiling into a cable which "should have been clipped to a joist", and says it's not his fault. I don't like it, but the world is getting stupid.

Sorry, i just find this all too funny worrying about things like this!! I know that if i could pull in new cables using the original cables, verses lifting a myrid of floor boards, it'll be using the original cables, ...1st, ...2nd and 3rd!! ...lol!! Loft area and new builds is a differen't matter... There are no floor boards!! ...lol!!

 

[Engineer54]

unless you have clerk works on last job, existing 20mm conduit for switch drops had to be chopped out as drawing in new cables can cause damage - go figure

Haha!! must be a 17 day/5 week wonder, that's fell on his feet!! Noththing to figure, the guy needs sacking!!

 

[Spudnik]

Interesting subject.

The way i see it...

Standard 3 bed house, suspended ground floor.

Using old cables to draw in new ground floor ring is all well and good, but then, how many times have the new sockets been in exactly the same location?... and more often than not, there will be at most two or three in a lounge.

Upstairs under floor?

Well, 90% of the rewires i have done, have had all the old cables still clipped against the joists and so would be impossible to use them as draws (apart from the switch drops etc.)

 

[ezzzekiel]

if i remember rightly he was a tailor who made his way into the game via a relative