UK Does this wiring look ok?

[telectrix]

I will call them tomorrow but as the tiling starts tomorrow I'm not sure there much else I can do.

what you need to do is to stop the tiling untill the wiring has been sorted. politely inform the tiler that you are not happy with the wiring and he can't proceed till it's fixed safely. tell him that if he tiles over that mess, he's jointly liable for any injury or fire that may result. then he'll reoprt back and something might be done.

 

[Wheelhouse20]

without being on site to see what is happening and what the plan is, it is difficult to comment.

however from the pictures you have provided it would appear that there are several things wrong with the installation.

these include connections that are to be permanently hidden that may not be suitable for the job.

cables that have been surface mounted but may well be plastered over have not been capped (covered to protect from damage caused by the reaction between plaster and pvc cable)

cables that have no secondary insulation ( it is not acceptable to have the brown and blue cores showing, it should be going into all the sockets etc. still covered by the grey outer sheaf)

I would ask the people who ordered the work to come and have a mid work appraisal of how things are going and follow this with an email or letter, detailing your concerns.
once they realise that there is a paper trail that can lead back to them, they will be more helpful in dealing with your concerns.

email is great, because you can add the pictures so there is no confusion.

Thank you for your time in writing this up.

 

[Mikeg1]

looks like a 1st year apprentice has been let loose

 

[driverman]

I would be contacting your housing association about your concerns along with this photographic evidence. The level of work shown is appalling and dangerous.

I agree with what you say. It reminds me when I used to do electrical surveys years ago, in instances like above, I could never say to a customer that the installation was dangerous.
I had to say that it was hazardous. Apparently if we used the word dangerous, customers would ring and say that we were scaremongering!
Hazardous sounds much better!

 

[davesparks]

cables that have been surface mounted but may well be plastered over have not been capped (covered to protect from damage caused by the reaction between plaster and pvc cable)

Capping is not required by the regulations, modern plaster does not react with PVC cables, I don't think this has ever been the case with a plastic insulated cable. Capping is used to prevent damage from metal plasterers trowels.
The use of capping or conduit is entirely by the choice of the installer or specifier.

 

[James]

No, plaster will react with pvc cables. It migrates the plasticiser from the pvc and makes it brittle.

 

[suffolkspark]

Never heard of this bud? And never spotted any thing on rewires,Heard it about cirtain polystyrenes though

 

[James]

GN1 4.7 page 76 materials likely to cause such attack include:
plaster coats containing corrosive salts
lime, cement and plaster
a few examples of this are:
plasticicers migrate to polystyrene from thermoplastic and also some types of plaster (see7.5 also)

 

[davesparks]

No, plaster will react with pvc cables. It migrates the plasticiser from the pvc and makes it brittle.

No it doesn't, polystyrene and some other plastics, oils and similar chemicals can cause migration of the plasticiser, this is what causes old T&E clips to look like they have melted onto the cable.
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GN1 4.7 page 76 materials likely to cause such attack include:
plaster coats containing corrosive salts
lime, cement and plaster
a few examples of this are:
plasticicers migrate to polystyrene from thermoplastic and also some types of plaster (see7.5 also)

Corrosive salts from plaster etc will attack metals, so (non galvanised)steel conduit, bare MICC etc should not be buried in plaster etc.

Read the last sentence again, as you have written it there it says that plasticisers migrate to polystyrene from thermoplastic and also plaster,
This says that plasticisers migrate from plaster to polystyrene, not from thermoplastic to plaster.

 

[JK-Electrical]

looks like a 1st year apprentice has been let loose

Aye ..... a first year plumbing apprentice!