oscar21
Nearly Esteemed
Does a SPD need a dedicated way?
I need an extra way in this unit for a 3 phase car charger
![[ElectriciansForums.net] Does a SPD need a dedicated MCB?](https://www.electriciansforums.net/attachments/img_20240503_132821_535-jpg.116331/ "[ElectriciansForums.net] Does a SPD need a dedicated MCB?")
As you can see its a small unit with no extra ways, the building is rented and the tenant is adamant that the board is not to be changed as he has been told no major alterations. We have already bodged it somewhat on his say so by adding a small single phase board for some extra lighting and sockets he wanted (we shuffled the circuits about so all the socket/water heater circuits were spread across the phases and its just lighting sat on the single phase board, thats was last year and everything has been fine so far. I would have fitted an aditional 3ph unit but the mains cupboard is tiny.
He now wants to do similar with the car charger but I need three ways so it would mean moving three socket circuits all onto one phase. But I was thinking, the little unit below has the SPD in it which is fed from a 32A 3 phase MCB, any reason the car charger can't share the same MCB from a regs point of view?
I know its a bodge but I'll be bodging it anyway in one way or another, I also cant say no as its the bloke's office that gives us tonnes of work.
Now for the second question, I don't normally fit car chargers, this is the unit he's bought,
Cant make head nor tail of the instructions, they have a whole paragraph dedicated to how the lead might strangle a kid but nothing that I can find on the type of connection, rating etc, main question is will it need an RCD, the supply cable wont need it as its back to back with the mains unit.
I hate getting involved in stuff like this, its always far from straightforward.
I need an extra way in this unit for a 3 phase car charger
As you can see its a small unit with no extra ways, the building is rented and the tenant is adamant that the board is not to be changed as he has been told no major alterations. We have already bodged it somewhat on his say so by adding a small single phase board for some extra lighting and sockets he wanted (we shuffled the circuits about so all the socket/water heater circuits were spread across the phases and its just lighting sat on the single phase board, thats was last year and everything has been fine so far. I would have fitted an aditional 3ph unit but the mains cupboard is tiny.
He now wants to do similar with the car charger but I need three ways so it would mean moving three socket circuits all onto one phase. But I was thinking, the little unit below has the SPD in it which is fed from a 32A 3 phase MCB, any reason the car charger can't share the same MCB from a regs point of view?
I know its a bodge but I'll be bodging it anyway in one way or another, I also cant say no as its the bloke's office that gives us tonnes of work.
Now for the second question, I don't normally fit car chargers, this is the unit he's bought,
iON 22kW or 7kW Modes 3 Phase 8M Tethered EV Charger Type 2 Level 2, Card+ Wi-Fi | eBay
Adjustable output 3.5kW - 22kW. Power output: 22kW. 3 Phase and Single Phase Modes. Security RIF card mode. Wi-Fi online APP mode. Touch screen. 2x Key Fobs included. Uses TUYA or Smart Life APP's.
www.ebay.co.uk
Cant make head nor tail of the instructions, they have a whole paragraph dedicated to how the lead might strangle a kid but nothing that I can find on the type of connection, rating etc, main question is will it need an RCD, the supply cable wont need it as its back to back with the mains unit.
I hate getting involved in stuff like this, its always far from straightforward.
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