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EF: TT System Existing is a multi9 13 way RCD main switch DB

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EF: TT System Existing is a multi9 13 way RCD main switch DB

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fattony

TT System Existing is a multi9 13 way RCD main switch DB

Hi

Ive read a few discussions on the topic but what setup would you recommend for replacing a DB on a domestic TT system?

I've moved house and need to get the meter changed ready for the car charger, I need to upgrade the severely dated DB at the same time.

Existing is a multi9 13 way RCD main switch DB, one of those circuits is a sub main to the garage which I'm intending on adding a car charger to at some point, realistically the only option I see is a 16 way DB, I was looking at this

https://www.cef.co.uk/catalogue/products/5183084-16-way-100a-sp-n-type-a-distribution-board-with-incomer?msclkid=061440893d991f53b24b2659d78aba45&utm_source=bing&utm_medium=cpc&utm_campaign=Smart%20Shopping%3A%20Switchgear%20%26%20Distribution&utm_term=4587368677094774&utm_content=Smart%20Switchgear%20%26%20Distribution&gclid=061440893d991f53b24b2659d78aba45&gclsrc=3p.ds

The intention was to use RCBO's for the circuits which I think would allow me to keep the main switch, I think my next question is on the sub main to the garage, if this is for example a 50A 30mA RCBO in the main DB would I need to install RCD protection in the sub main or should that not be a RCBO and a separate earth ROD installed for the garage, this would prevent a fault tripping a RCD upstream.

Thanks

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