Which RCD to use for EV charging point?

[HappyHippyDad]

I don't fit EV charging points as I am not OLEV registered. However, I am fitting a Tesla EV charger soon for a friend as I owe him a favour.

The Tesla spec asks for a Type B RCD or Type A-EV RCD.

Looking at Regulation 722.531.2.101 this sates the same as above.

The regulation states a Type A RCD AND appropriate equipment that provides disconnection of the supply in the case of DC fault current above 6mA.

Is this 'equipment' located in specific Type A RCD, or in certain EVCP's, or a seperate piece of equipment?

The tesla wall charger spec says it does not measure DC current leaking.

It sounds easier just to go for a type B RCD but it is difficult to locate one, could any EVCP installers send a link?

Thanks

 

[plugsandsparks]

Gosh that is cheap, German engineering meets Chinese, I think the only Chint product i have bought is a 2P din mounted contactor...... Not sure i am ready to power the economy that had broken ours... lol

 

[ChrisElectrical88]

Is it the Tesla branded Charger? What earthing system is in the installation? Type A Double Pole 30mA RCD will be required, Type B are well expensive

 

[Risteard]

Is it the Tesla branded Charger? What earthing system is in the installation? Type A Double Pole 30mA RCD will be required, Type B are well expensive

Without 6mA DC leakage protection it has to be a Type B.

 

[ChrisElectrical88]

Without 6mA DC leakage protection it has to be a Type B.

Type A RCBO will Give that protection?
[automerge]1600026315[/automerge]
Just read the Manufacturing Instructions. Type A is fine for the Tesla Charger.

 

[pc1966]

Interesting. I've never come across an RCBO with Type B RCD characteristics - only RCCBs. Do you have a link to these devices?

I don't know if they are offered in the UK/ROI but this is what I remember seeing:

Doepke - residual current operated circuit-breakers with integral overcurrent protection DRCBO 4 B32/0,03/3N-B SK

Residual current operated circuit-breaker with integral overcurrent protection, three-pole+N, 32 A, 0,03 A, B-characteristic, Type B, short-time delayed (09948107)

www.doepke.de

 

[Risteard]

Type A RCBO will Give that protection?

It won't. Excessive DC leakage could potentially disable a Type A RCD. The RCD wouldn't open if the leakage became excessive though. Therefore a Type B is required where there isn't equipment to prevent this.

 

[pc1966]

Could I ask why you've mentioned 3 phase supply @pc1966 ? My friends supply is single phase. Are the tesla chargers only compatible with 3 phase, I wouldn't have thought so?

I was thinking of thier fast charger, but I see they also do a 'normal' speed one as well.

 

[Risteard]

I don't know if they are offered in the UK/ROI but this is what I remember seeing:

Doepke - residual current operated circuit-breakers with integral overcurrent protection DRCBO 4 B32/0,03/3N-B SK

Residual current operated circuit-breaker with integral overcurrent protection, three-pole+N, 32 A, 0,03 A, B-characteristic, Type B, short-time delayed (09948107)

www.doepke.de

Interesting. Haven't personally come across them. I'm sure the price is scary.

 

[pc1966]

Interesting. Haven't personally come across them. I'm sure the price is scary.

I would not expect much change from £500 to be honest.

 

[HappyHippyDad]

This one looks perfect

Type B RCD + 2 MCB Garage / Mini Metal Consumer unit - EV Charge Point Install

63a Type B RCD Metal Garage / Mini Consumer Unit, Fuse Box, with B Type 40amp and 20amp MCB's Fitted. For Single Phase AC installs of EV Charge Points or other installations that require full AC and DC leakage protection. Consumer Unit Specifications: Height: 259mm, Width: 160mm, Depth: 109mm...

shop.evchargersdirect.co.uk

As suggested I shall just blank off the spare way and explain to my friend that it is not to be used.

 

[Gavin John Hyde]

I fit loads of chargers. You don't need to be olev approved to install them. Only if you want to offer the £350 grant do you need that. It's just changed, now we can fit any olev approved charger not just ones we have manufacturers approval for.
If the charger has in built 6maDC protection then you need a Type A RCD or RCBO. Can't recall if the tesla unit has this?
Cheapest source of type a rcbos is ironically Rolec. The new RCBOs seem better than the old blue ones which melted!
Not a fan of the tesla wall charger. Find it quite poorly built and flimsy. Also has a huge hole in bottom you need a 32mm gland for as the supplied plugs are often poorly made and undersized. On the positive you can link 4 together to share load easily.
Best options for easy install is the zappi. It only needs a MCB upfront as all the RCD and DC monitoring and earth monitoring is in the charger and needs no earth rod.
[automerge]1600028112[/automerge]

This one looks perfect

Type B RCD + 2 MCB Garage / Mini Metal Consumer unit - EV Charge Point Install

63a Type B RCD Metal Garage / Mini Consumer Unit, Fuse Box, with B Type 40amp and 20amp MCB's Fitted. For Single Phase AC installs of EV Charge Points or other installations that require full AC and DC leakage protection. Consumer Unit Specifications: Height: 259mm, Width: 160mm, Depth: 109mm...

shop.evchargersdirect.co.uk

As suggested I shall just blank off the spare way and explain to my friend that it is not to be used.

Have used these and very good. Perfect for the job.

 

[HappyHippyDad]

I fit loads of chargers. You don't need to be olev approved to install them. Only if you want to offer the £350 grant do you need that. It's just changed, now we can fit any olev approved charger not just ones we have manufacturers approval for.
If the charger has in built 6maDC protection then you need a Type A RCD or RCBO. Can't recall if the tesla unit has this?
Cheapest source of type a rcbos is ironically Rolec. The new RCBOs seem better than the old blue ones which melted!
Not a fan of the tesla wall charger. Find it quite poorly built and flimsy. Also has a huge hole in bottom you need a 32mm gland for as the supplied plugs are often poorly made and undersized. On the positive you can link 4 together to share load easily.
Best options for easy install is the zappi. It only needs a MCB upfront as all the RCD and DC monitoring and earth monitoring is in the charger and needs no earth rod.
[automerge]1600028112[/automerge]

Have used these and very good. Perfect for the job.

Thanks for all, it was very useful
With regards the unit I have linked in my last post, the RCD takes up 4 modules and has 415V written on it. It states single phase but looks like 3 phase. is it single phase and if so why all the extra positions for conductors (as if it was 3 phase)?

 

[ChrisElectrical88]

@happyhippydad habe you considered the earthing arrangement

 

[HappyHippyDad]

@happyhippydad habe you considered the earthing arrangement

Yep, its TT, so no PME to worry about luckily.

 

[Gavin John Hyde]

Thanks for all, it was very useful
With regards the unit I have linked in my last post, the RCD takes up 4 modules and has 415V written on it. It states single phase but looks like 3 phase. is it single phase and if so why all the extra positions for conductors (as if it was 3 phase)?

Not sure why but some type b RCDs are 3 module. That supplier do good double pole RCDs. Give them a call.