Car Charging Unit

I'm installing a 32A car charger, ahead of a new distribution board being fitted so that it can be hooked up by the electrician.

There's no instructions though....

I'm assuming that live and neutral will go into the circuit breaker and earth into the green and yellow adjacent connector to join the other earth coloured wires.

What I'm surprised about though is no obvious point to bring 6mm cable into the back of the unit, which I thought would have been there with some seal to make watertight. I presume the I need to make a small hole towards the bottom edge of the back, so that if any moisture enters then it can escape without going near the components.

Any thoughts?

Thank you

I'd expect at least one knock out that could be used. When you say 6mm what cable are you using exactly? If it's T&E a stuffing gland should be ok depending on how much gap there is between the back and surface.

https://www.tlc-direct.co.uk/Main_Index/Cable_Accessories_Index/Sprint_Cable_Glands/index.html

chivers67 said:

When you say 6mm what cable are you using exactly? If it's T&E a stuffing gland should be ok depending on how much gap there is between the back and surface.

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Thank you, yes T&E.

Thanks for the link too.

For once. Would say leave it to the electrican.

Mark Hancock said:

I'm assuming that live and neutral will go into the circuit breaker

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Yes

Mark Hancock said:

and earth into the green and yellow adjacent connector to join the other earth coloured wires.

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That depends on what type of earthing your property has.

Not sure what has to be done by the electrician to get the grant etc. So would not touch it, as it could work out expensive.

ericmark said:

Not sure what has to be done by the electrician to get the grant etc. So would not touch it, as it could work out expensive.

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It worked out cheaper to buy the unit ourselves than to get it done with the grant, as we'd have had to pay for a new distribution board anyway.

flameport said:

That depends on what type of earthing your property has.

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I've checked with the electrician who's coming in to do the new board and connect it up.

Mark Hancock said:

There's no instructions though....

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That's quite a problem as thete are a whole load of rules that apply specifically to EV charging points - it's not like just throwing a socket on the end of a cable. These rules include some very specific ones about earthing and you might not be able to use the house earth.
Some units have monitoring to get around the earthing issue - but that's the sort of thing the instructions would include. Looking at the first photo, it looks like the earth wire goes directly from the terminal block to the charging socket - which AIUI means it is not one that is allowed to use a PME earth.
So you need the knowledge, skills, and specialised tools to be able to select a location for an earth rod and test it's quality when installed. That's if you have the space needed for the earth rod - I vaguely recall thete being some rediculous distance needed between your new earth rod and any buried services that could introduce dangerous voltages into it.
Oh yes, and it's notifiable work as well.