1st fix - best cables & back boxes? Also, separation of data and 230V with a wall?

[Alan Ambrose]

A couple of misc 1st fix questions if I may...

 

Are there better mains cables than Doncaster Cables earthsure e.g. a LSZH version?

 

Who makes the best quality ~45mm metal back boxes?

 

I know that in a cable tray scenario data & mains should be separated. What about within walls - we're planning to separate with dividers, but will undoubtably need to cross mains cables at right angles with data/ELV at some point?

 

Can I use something like this for mains + data? From the pic, I think the two compartments are separate.

 

 

Yes, I know ... ask your proper electrician - but I'm an EE and feel happy making  these choices. Also, our 1st recommended & qualified electrician on site did this, and won't be back again:

Yes, that's gaffer tape as blanking plus wood screws holding the new CU front plate on FFS ... seems to me that's qualified but not competent.