Color marking of wires from the boiler

Color marking of wires from the boiler

I understand correctly: blue is zero, yellow-green is grounding, everything else is a phase. Those contacts that are connected by a copper plate is 0, and the blue phase?

Why did the LED lights blink?

Why did the LED lights blink?

He turned on the light, cotton and light bulbs when connecting began to blink, gradually reducing the blinking rate, they simply went out. What could it be a closure or something else?

Drowned car audio amplifier

Drowned car audio amplifier

The amplifier was immersed in water for at least half. Should I take it apart (violating the warranty) in order to wipe the entire board and contacts with alcohol?

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