I personally know very little about electric wiring and appliances, but there are people in the Appropedia community who do know about it, and I’m very thankful for the work they put it to explain it – in particular, how to stay safe:
- Measures to protect against electric shock – Extra Low Voltage, Insulate all live parts and Use an RCD (GFI)
- Protection against overheating, and
- Protection against overcurrent
Very useful, especially for those living and working in places (probably most of the world) where you can’t just ring up a certified electrician.