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Just chatting to an installer who was stating the install needs to meet Regulation 18 or something and lots don't?
Also said must have an earth rod (they only provide wallbox)

Finally said tethered with work with type 1 and 2 universally
When pushed - they said it is a type 2 but you use a converter plug for type 1 so tethered is fine for future compatibility with any car

thoughts?
 

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By 'regulation 18' they probably mean the 18th Edition of the IET wiring regulations (from 2018), specifically Amendment 1 (2020) which has certain tighter requirements on earthing. This video has a summary of the issues:

In general, it's simpler to fit a charger with PEN fault protection rather than install an earth rod, although an earth rod might be suitable if it's not a front garden/drive. The Wallbox does I think have PEN fault protection.
 
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