I think the main hazard is fire, isn't it? Both the RCD and the earth connection are to stop humans from being electrocuted if they are touching the circuit whi

I think the main hazard is fire, isn't it? Both the RCD and the earth connection are to stop humans from being electrocuted if they are touching the circuit while it shorts. I don't know enough about the characteristics of a charger exploding but I'd say the RCD may not be fast enough to prevent the explosion, and that's assuming the explosion is due to shorting to begin with. The 'uncle' post of your one had some good advice http://news.ycombinator.com/item?id=3904523 http://news.ycombinator.com/item?id=3904523