Terminating SWA with Wylex REC Supply Isolators

[johnboy6083]

As has been mentioned, if the CU is more than 3m away, it's almost certain that the DNO will require additional fusing.
i would go with individual fuses per CU, and mount the whole lot on steel trunking. It's cheap, easy to use and won't take long.
Make sure the locknuts are tight. I would fly lead from the trunking to each individual switch fuse.
will the armour on the 16mm 2 core be upto the spec for the bonding if its TNC-S? suspect not, but I'm not aware of all the facts as you are.
Don't forget that for main bonding of PME supplies, it's the conductivity that is of prime concern, unlike the adiabatic, in which limiting temperature is the concern.

 

[Michaelwgroves]

As has been mentioned, if the CU is more than 3m away, it's almost certain that the DNO will require additional fusing.
i would go with individual fuses per CU, and mount the whole lot on steel trunking. It's cheap, easy to use and won't take long.
Make sure the locknuts are tight. I would fly lead from the trunking to each individual switch fuse.
will the armour on the 16mm 2 core be upto the spec for the bonding if its TNC-S? suspect not, but I'm not aware of all the facts as you are.
Don't forget that for main bonding of PME supplies, it's the conductivity that is of prime concern, unlike the adiabatic, in which limiting temperature is the concern.

Well spotted, yes all the CU's are more than 3M away. I was just driving back and thought I should mention this, but you beat me to it. This is one reason for using the Wylex Rec Isolators. I assume they are okay for the job?

Also worth mentioning is I also chose these for size as we don't have a lot of room in the intake cupbord.

 

[HandySparks]

Well spotted, yes all the CU's are more than 3M away. I was just driving back and thought I should mention this, but you beat me to it. This is one reason for using the Wylex Rec Isolators. I assume they are okay for the job?

Also worth mentioning is I also chose these for size as we don't have a lot of room in the intake cupbord.

The Wylex REC isolators aren't fused; so not OK.

 

[Engineer54]

If you have 12 number of flat's to supply, you maybe better off thinking about a Ryefield panel at the intake cupboard Where all the fuses are located in the one panel.

What do you have there, a 3 phase DNO supply??

 

[londonlec]

All this job requires is an electrician.

 

[Octopus]

Back to the drawing board me thinks

 

[Rockingit]

Unless I've completely misunderstood all this, this sounds like a classic case of over engineering through misunderstanding. What's wrong here with Intake > KMF > 16mm TE plus additional 10mm cpc if the adiabatic is over 6mm? Easy to run, easy to terminate and much cheaper plus adding a fuse into the system.

 

[High Tower]

I second a rye field ! Or the use of 110m's there isn't really any other way. And if you have the budget to build 12 flats then you should have the budget to provide the right sub mains

 

[High Tower]

Unless I've completely misunderstood all this, this sounds like a classic case of over engineering through misunderstanding. What's wrong here with Intake > KMF > 16mm TE plus additional 10mm cpc if the adiabatic is over 6mm? Easy to run, easy to terminate and much cheaper plus adding a fuse into the system.

If they are flats then the chances are the subs would need RCD protection if ran in T&e

 

[Knobhead]

What is you’re objection to trunking? If there are 12 cables to make off I can’t think of a better option. 12 X adaptable boxes are going to look a mess.
As for the CPC E54’s table shows that you are right to use the armouring.