Why burn outlet. 2 case studies

This outlet has worked for 11 years, and then burned at the moment it was connected to a washing machine, everything worked out, but the hostess pretty nervous.

Why did it happen

Dismantling the socket, I saw this picture. She was connected to the core wire in the socket was not a screw clamp and fixing wires carried through the clamping plate, in the manner of WAGO terminal blocks, which are designed to monozhilu. Over time, the contacts loose wires overheated and closed.

But it surprised me, and the fact that the electrician took out of the box working zero and used it as a defense, it is strictly prohibited, as in case of interruption of zero on the body machine would have been a phase with all the attendant.

Overload

This case is considered a curious, because he surprised me, but it is in principle difficult to do. Cleaning the boiler and the owners have complained of burnt socket, boiler consumes 1.5 kilowatts of that outlet is not a problem.

But the owner has suggested that blame hair dryer wife. Hair Dryer? Yes, how much he can eat? Asked for and when looked at him stunned parameters 2.4 kW, more than my building. The total capacity of the instrument was 3.9 kW, with an application for an outlet of 3.5 kW.

Output

Sockets are lit by poor contact, short-circuit and overload protection, when power of the device exceeds the calculated, and they are of poor quality. I must say that this is not all the reasons, but also listed enough, they tend to be basic.

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