I'm planning to buy an Ampera and I'm doing some thinking about home charging, and in particular the earthing requirements for a home charging unit. I posted over on the "Electric Car Related Topics » EVSE - Charging Equipment" forum, hope its OK to canvas the opinions of UK Ampera/Volt owners here as well! 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 (I think I read this in the Pod Point installation guide). 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. This earth wire connects in some way 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?