Terminating SWA with Wylex REC Supply Isolators

[Michaelwgroves]

Okay, I now understand Ryefield board. So this covers the fused part but I still need the switch bit?
Single switched fuse on each leg seems to be the answer as mentioned a few times, but it would be nice to have a single box soloution. Does such a thing exist?

 

[pennywise]

6 by 6 steel trunking or bigger in an E shape, terminate all armoreds into the top row of the E then have the two banks of 6, wylex 63amp switchfuse isoloators with a space next to it for the DNO's meter.

 

[johnboy6083]

You only require single pole isolation on TN supplies, and that can be achieved using a ryfeild board or similar.

each installation will also have a main switch in the CU.

 

[High Tower]

You only require single pole isolation on TN supplies, and that can be achieved using a ryfeild board or similar.

each installation will also have a main switch in the CU.

So you don't think it wise to have a isolator per SWA after the meter so it becomes possible to isolate one sub main without shutting down the whole building

 

[High Tower]

6 by 6 steel trunking or bigger in an E shape, terminate all armoreds into the top row of the E then have the two banks of 6, wylex 63amp switchfuse isoloators with a space next to it for the DNO's meter.

How do you split the tails 12 times without a Ryefield?

 

[High Tower]

Okay, I now understand Ryefield board. So this covers the fused part but I still need the switch bit?
Single switched fuse on each leg seems to be the answer as mentioned a few times, but it would be nice to have a single box soloution. Does such a thing exist?

See the last item in post 87

 

[High Tower]

No, just you, you seem to be on a mission, not sure what your objective is but you seem to be alone.
You are free to post your opinion but you just don't stop.

The all in one solution is

250a 8way tpn hager DB with lockable door and use taper proof labels

Supplying 12 landlords meters

Supplying 12 SWA's

Quick cheaper and takes a lot less room!

 

[Jdsparky]

The all in one solution is

250a 8way tpn hager DB with lockable door and use taper proof labels

Supplying 12 landlords meters

Supplying 12 SWA's

Quick cheaper and takes a lot less room!

Nice solution but although unlikely, the 250a switch wouldn't be rated high enough for the loads, ie maybe 30-40 amps per flat at peak times like 5.30pm when there all cooking dinner and having showers after work. Would be a great idea if the switchgear was rated higher, probly why a ryfield has been suggested as is made for the job.

 

[Michaelwgroves]

How do you split the tails 12 times without a Ryefield?

Surly that's the DNO's job, UK Power Networks into Meter, then Switch Fuse from the meter to CU ?

I believe I currently have an 8 Multiway Cut out, looks like a Ryefield. But I'm not 100% sure on that.

 

[High Tower]

Nice solution but although unlikely, the 250a switch wouldn't be rated high enough for the loads, ie maybe 30-40 amps per flat at peak times like 5.30pm when there all cooking dinner and having showers after work. Would be a great idea if the switchgear was rated higher, probly why a ryfield has been suggested as is made for the job.

I'd hope it would be mate because the biggest supply the DNO is likely to give on a block of bed sits is 200a tpn max

 

[High Tower]

Surly that's the DNO's job, UK Power Networks into Meter, then Switch Fuse from the meter to CU ?

I believe I currently have an 8 Multiway Cut out, looks like a Ryefield. But I'm not 100% sure on that.

No you are missing the point again, the DNO cut out is before your meter. You will get one singular tpn supply from your meter, it is then you responsibility to split this for your landlords meters, unless you get the DNO to give you 12 metered supplies but that is big big money and you would still need switch fuses after that

 

[Jdsparky]

I'd hope it would be mate because the biggest supply the DNO is likely to give on a block of bed sits is 200a tpn max

You maybe right

 

[Michaelwgroves]

No you are missing the point again, the DNO cut out is before your meter. You will get one singular tpn supply from your meter, it is then you responsibility to split this for your landlords meters, unless you get the DNO to give you 12 metered supplies but that is big big money and you would still need switch fuses after that

Okay it's coming together, obviously the box that looks like a Ryefield is a Ryefield!
The current install is 8 metered supplies. I want to stick with this so EDF bill tenants directly.
I'll take a picture at the weekend for clarity.

So assuming this is all correct, is the only soloution 12 No. switch fuses or is there a single box soloution for this?

 

[High Tower]

No there isn't

You did not tell us this at the start. The last 80 posts are pointless

You need to Apply to the DNO to get their horizontal Ryefield upgraded to a 12 way. They normally need 6-12 weeks notice. Big E shaped trunking. 12 x Wylex 110m's you are probably looking at £5k ish for the upgrade

 

[High Tower]

This pile of junk is a 12 flat complex with DNO meters and a very old Ryefield that I had the pleasure of sorting out.

 

[Octopus]

No there isn't

You did not tell us this at the start. The last 80 posts are pointless

You need to Apply to the DNO to get their horizontal Ryefield upgraded to a 12 way. They normally need 6-12 weeks notice. Big E shaped trunking. 12 x Wylex 110m's you are probably looking at £5k ish for the upgrade

Oh dear more of his budget blown!

 

[Brightspark2]

This pile of junk is a 12 flat complex with DNO meters and a very old Ryefield that I had the pleasure of sorting out.

"Yes all the tags where already cut on the meters, every single one of them. I didnt touch a thing"

 

[Michaelwgroves]

Already made application 3 weeks ago, rough estimate was £5k, so I think we are on the same page.

Okay, we have our final design.

The beggining of the post is still relevent as I was corrected on type of switch fuse, so this was worthwhile.

Bottom right corner of your picture looks same as mine, is that an old Ryefield?

 

[High Tower]

All you need is 12 x Wylex 110m now

 

[Michaelwgroves]

Thanks, Do you have any pictures after you finished?