I'm seriously considering buying a Vauxhall Ampera, and I'm doing some planning for home charging. My question concerns earthing requirements for a home charging unit. I see references to people needing an earth spike installing as part of the charging unit installation, with possible digging up of drives, etc. Can anyone explain when a new earth connection is required? I know that if the current house earth is to a gas or water pipe then this is NOT deemed adequate (read this in the Pod Point installation guide I believe). In my house (20 yrs old), I have a thick green and yellow earth wire coming out of the consumer unit along with the two heavy supply cables from my meter, which connects in someway into the supplier side of the meter - it disappears into a plastic housing from which the two thick supply cables enter the meter. I wonder if this means I would have adequate earthing already. What experiences have people had with the earthing arrangements?