Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 28 replies
  • Subscribers 31 subscribers
  • Views 3577 views
  • Users 0 members are here
Options
You may also be interested in
This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

Adding EV charge point to garage supply

Former Community Member
Former Community Member
Hi all, 

I need to replace the old fuse box in the garage with a CU and at the same time install a load balancing a fast charge outlet for electric vehicle.

Current installation has a sub panel in the house (40A) with type B MCBs: 20A for kitchen sockets and 32A for the garage supply. Main board is double RCD 80A, and DNO fuse is 100A.

10mm armoured cable underground to garage, approx 15m.

Plan is to move the kitchen sockets on to the main board (there is a spare), replace the adjacent garage sub panel for a 63A RCD panel with a 63A MCB, and replace the old fuse box in the garage with similar panel but with a 6A, a 16A and two 40A (one for the EV and one for the office that runs off this fuse box).


Does that work, or have I missed anything?


Thanks | Paul.
Parents
  • 0
    Paul Bamford:

    Thanks Chris, I’d misread the tables, but Method D looks like 60A, or am I missing something? Even so, with my existing SWA 10mm cable I’m restricted to 40A RCD protection?


    Paul, see 433.1.203. I worded it slightly badly. Whilst the cable may well handle 60 A (or more depending upon the soil conditions) the overload protective device must be rated at no more than 0.9 times the tabulated CCC, so a 50 A MCB would be the max.


Reply
  • 0
    Paul Bamford:

    Thanks Chris, I’d misread the tables, but Method D looks like 60A, or am I missing something? Even so, with my existing SWA 10mm cable I’m restricted to 40A RCD protection?


    Paul, see 433.1.203. I worded it slightly badly. Whilst the cable may well handle 60 A (or more depending upon the soil conditions) the overload protective device must be rated at no more than 0.9 times the tabulated CCC, so a 50 A MCB would be the max.


Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines