Wiring In a Shed, advice needed on SWA route

[Big_Paul83]

It’s long enough, plus it’s future proofing in case of a potential extra circuit in the future

 

[Spoon]

It’s long enough, plus it’s future proofing in case of a potential extra circuit in the future

I think @snipersmith87 comment "Is it a long run?" was most prob about volt drop and that is why you are going for 6mm cable.
Just out of interest mate, what is the approx cable length route from house CU to shed CU? You did say the shed was 5 meters away.

 

[Big_Paul83]

Total length is around 20 meters for the cable route.
Anyway, the volt drop would be negligible. Also it’s going to go under the wooden floor and not encapsulated in insulation or plaster.
I know I probably don’t have to run 6mm2, but it’s just if I end up running something a bit heavier than a couple of computers and the lights

 

[buzzlightyear]

andymann why are you putting dumb , dont stand on touch line. get on the pitch and say something.

 

[Norah Nabino]

Hi All,
I have a couple of questions regarding running SWA cable between the Internal House CU and The Shed New CU.

The shed is basically being used as a home office and as such has a 6A lighting circuit and 16A Circuit for Socket outlets. Will be running a couple of computers and Monitors.

So, First things first, I understand that running power out to the Shed is notifiable, however I'm not Part P registered, however I do design electrical systems for ships, so I'm a bit beyond a normal DIYer.

House is pretty old and not had a re-wire for a long time.
TN-S Earthing.
I think a new CU in the house is probably best.
RCD protected for House Circuits, Seperate 32A MCBO for supply to Shed, as the Shed CU has its own RCD.
Can the House CU be Changed and retain the original RED/Black house wires?

I need some advice on running the SWA cable from the house CU to the Shed.
Plan is the use 6mm2 SWA, correct glands for earthing or the armour to the Metal CUs and one core for Earth as well as the Armour.

The house has Suspended wooden floor so running the SWA from the consumer unit to the exterior wall is no problem.
Is there a specific requirement for the height the cable must enter/exit the building?
Should the SWA be chased into the wall internally before it goes through the cavity if it has to come out at a certain height?

Once on the outside it will be clipped along the exterior wall where it will head to shed...
Entry through side panelling with drip loop and then into Shed CU.

Shed distribution from Shed Cu is all done in conduit and already wired ready to go.....

Thanks in advance for any input and help, have a beer on me!

Hi,have you worked out your circuits design properly? ?
Why are you having 32a RCBO for the shed and RCD in the shed CU?
Have you worked out your discrimination?
I assume you are using radial circuits in the shed,why are you using 16a for sockets?

 

[GeorgeCooke]

Could also use one of these to get internet into shed.

NEVER use those things. They cause serious interference to other users of the RF spectrum, possibly including air traffic control.

The Likelihood and Extent of Radio Frequency Interference from In-Home PLT Devices

PLT devices operate between 2 and 32MHz, with some emerging devices operating at frequencies up to 300MHz. We commissioned a study to estimate the likelihood and extent of interference to various services over the coming 10 years.

www.ofcom.org.uk

https://www.ofcom.org.uk/__data/assets/pdf_file/0024/35907/pltreport.pdf

 

[davesparks]

Total length is around 20 meters for the cable route.
Anyway, the volt drop would be negligible. Also it’s going to go under the wooden floor and not encapsulated in insulation or plaster.
I know I probably don’t have to run 6mm2, but it’s just if I end up running something a bit heavier than a couple of computers and the lights

If you are allowing for a higher load in the future you need to calculate volt drop based on the higher load.