So we have 6m of a redundant cable (still connected to the main board) that would be good to use for connecting a home EV charger. I can't work out whether it's cross section 4mm, 6mm, or 10mm. So far I'm leaning towards 6mm (which might be fine for a 7kw unit) because we have a couple of cable runs that are chunkier (10mm?) for a 10.5 kw shower and what used to be a ceramics kiln. (Is now an oven and induction hob.) I've tried calculating off the cross section of the wires that make it up ... There are seven of them, so if they're 0.3mm each that gives me 6mm. If they're 0.4mm each that gives me 10mm. My sliding gauge can't really distinguish between the two, so I was wondering whether there's a "FACT" known only to professionals of this dark art such as "seven core is 6mm" or variations thereon .......?? (This is interim until the leccy suppliers get around to fitting a double pole isolator between the meter and the board ... or main fuse and meter? ... so proper upgrades can happen in the future)
Weigh it ? Copper is a lot denser than PVC . . https://www.replenishh.com/Shop/Cable-Cable-Management/Power-Cable/Twin-Earth-6242Y That has the weight per 100m.
You'll have missed my edit ... It's attached which part of the appeal of using it. I could cut off a small section but suspect the error will creep back into the equation
I'm sure one of our resident sparks will be along shortly to remind you of The Rules regarding installing EV charging points. Not quite as simple as wiring it to a spare cable you found.
I know I know ... Won't be me anyway. For starters it's on a B16 not 32 or 40. Thing is it runs the right way so mucho disruption potentially avoided.
I've been reading up just so I know what to ask a sparky for in a bit of detail ... or at least understand what they're telling me It's a bit like listening to the weather forecast at the moment I'll have to re-read at least a couple of times.
Been there, done that ... He's the "answering machine" in this: (Can't find a non-private video at the moment so here's a still ...)
Not a spark but you can normally tell - 6mm looks like it’s smaller than 10mm which is bigger. That is the official answer.