Feed for workshop and for EV charger

[Iddy]

Hi all,
I will shortly be building a workshop at the end of my drive which is at the bottom of my back garden.
So I'll need power for the workshop, and will also be gtting an EV charger fitted (7kw).
I will need to get an armoured cable in ready - from the CU in the house to the workshop is c. 30m.
In my mind a 32amp feed with a 10mm2 cable would be ok - I'd be charging overnight and using some power tools during the day...
But, would it be better for the EV charger to have it's own supply, so run 2 x 10mm2?
Or, install 16mm2 to the workshop so well covered for both?

 

[Taylortwocities]

All you have described is notifiable work and not a DIY project. Your best route will be to engage the services of a registered electrician. He/she will be signing the installation certificate that they DESIGNED, INSTALLED and TESTED the whole and can notify your local LABC that the notifiable work have been completed in accordance with Building Regulations. The rules are even tighter in Wales.
My colleague @ericmark will give you more info on that.

Look here for a local REGISTERED spark to help you. https://electricalcompetentperson.co.uk/

 

[flameport]

If you want to get things ready, install cable ducting now, so that the required cables can be installed later.

63mm Twin Walled Cable Duct - Black | Univolt (FXKVR 63)

 

[aesmith]

You'll probably need data cables as well. Some (most?) EV chargers monitor the incoming supply so they can back off if the total load look too high. That might be Cat5e or screened twisted pair. You're not supposed to run those cables in the same duct as power, not sure if that's a requirement or just best practice.

 

[Taylortwocities]

You'll probably need data cables as well. Some (most?) EV chargers monitor the incoming supply so they can back off if the total load look too high. That might be Cat5e or screened twisted pair. You're not supposed to run those cables in the same duct as power, not sure if that's a requirement or just best practice.

There are EV cables that provide Cat5 cablkes in the same sheath as the power feed, so that must debunk any concerns about running Cat5 even in the same duct?

https://www.tlc-direct.co.uk/Technical/DataSheets/Cable/SWEVU4_3CAT5_Datasheet.pdf

 

[Deleted member 142255]

When England ammended the Building Regulations in 2010 they relaxed some of the requirements. Wales never changed, so the original version of the Building Regulations still apply.

Any work in bathrooms, kitchens, gardens etc is still notifiable in Wales.

 

[aesmith]

There are EV cables that provide Cat5 cablkes in the same sheath as the power feed, so that must debunk any concerns about running Cat5 even in the same duct?

https://www.tlc-direct.co.uk/Technical/DataSheets/Cable/SWEVU4_3CAT5_Datasheet.pdf

Most of my "knowledge" of data cabling came from working for a Systimax installer, so I may well be remembering things that were a requirement for a certified and thus warranted installation but not necessarily legal requirements. With that qualification the reason was that data cable insulation was not rated for mains voltage, rather than concerns about interference.

 

[Deleted member 142255]

Most of my "knowledge" of data cabling came from working for a Systimax installer, so I may well be remembering things that were a requirement for a certified and thus warranted installation but not necessarily legal requirements. With that qualification the reason was that data cable insulation was not rated for mains voltage, rather than concerns about interference.

It hasn't changed. Cables must all be rated for the highest voltage present.

 

[Taylortwocities]

Most of my "knowledge" of data cabling came from working for a Systimax installer, so I may well be remembering things that were a requirement for a certified and thus warranted installation but not necessarily legal requirements. With that qualification the reason was that data cable insulation was not rated for mains voltage, rather than concerns about interference.

It hasn't changed. Cables must all be rated for the highest voltage present.

If you read the last page of the Doncaster cables spec, it details their approach re separation of Band I and Band II.
In particular it says this:
EV-Ultra® consists of power conductors and data cables that are rated to the same nominal voltage – therefore segregation of power and data is not required.

 

[Deleted member 142255]

If you read the last page of the Doncaster cables spec, it details their approach re separation of Band I and Band II.
In particular it says this:
EV-Ultra® consists of power conductors and data cables that are rated to the same nominal voltage – therefore segregation of power and data is not required.

Yes, all of those combined cables are designed that way.