I've had a 32A charger installed under government funding for a 6.6kw electric car. My understanding is that the Nissan Leaf will pull around 27.5A. I'd want about 20-30% overhead on that to be safe, so a 40A MCB is required.
On the day of install, they only had 20A MCBs so they fitted that and said "Don't worry it'll be safe" - they'd be out in a week to fit the 40A MCB.
I've plugged the car in, no fires. But concerned that the MCB is the weak point and will be running at capacity rather than 20-30% below. Or am I worrying unnecessarily? It's a £2.78 item. Currently I'm running it off the 13A socket which has a specific lead with an inbuilt resistor to work off 13A sockets to be safe. I'm not sure how intelligent the car is when pulling a load of a 32A supply which is restricted to 20A.
On the day of install, they only had 20A MCBs so they fitted that and said "Don't worry it'll be safe" - they'd be out in a week to fit the 40A MCB.
I've plugged the car in, no fires. But concerned that the MCB is the weak point and will be running at capacity rather than 20-30% below. Or am I worrying unnecessarily? It's a £2.78 item. Currently I'm running it off the 13A socket which has a specific lead with an inbuilt resistor to work off 13A sockets to be safe. I'm not sure how intelligent the car is when pulling a load of a 32A supply which is restricted to 20A.