Why does the machine knock out when connecting the LED strip to the switch?

Nikita asks:
Hello, I’m connecting an LED strip in the kitchen.
I bought an LED strip, a transformer and a switch
Started to connect - short circuit.
Sequentially checked everything -
1) directly connected transformer - everything works
2) then the LED strip - everything also works
Then he put the switch back on and knocked out the plugs
I connect to L-PHASE Wires and to 1-zero
What could be the problem?
2 circuit breakers already burned
The answer to the question:
Hello! Do you call a transformer a power supply for an LED strip? Directly connected, do you mean that you did the preliminary assembly with the test and plugged it into a power outlet? If so then:
1. Is there a switch that disconnects 220V or low voltage?
2. Try to connect a conventional lamp instead of all this - if nothing changes, then you made a mistake in the distribution box or in the laying of lines.
3. Does the switch accurately open the phase? Maybe you close the phase switch with zero?

What does it mean: “I connect to L-PHASE Wires and to 1-zero”

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