Why does the machine and RCDs protecting the advertising box work?
An advertising box with LEDs was connected through an automatic machine in an electric panel, it worked. I put the photo relay, connected, when the relay was triggered, the machine and the RCD worked. I connected it without a light switch, I connected it, the introductory machine and the machine worked. What is the reason? Could there be a reason that when connected to the box the phase and zero are not respected? Can zero be thrown as ground to the chassis? A 3-core cable comes out of the box, The yellow core is cut at the root. Accordingly, the connected cable without grounding. Many thanks.
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If the machine tripped immediately after applying voltage to the box, then this indicates a short circuit. Something might have been connected incorrectly. Without inspecting this box with LEDs, it is impossible to name the cause of the operation. But in any case, somewhere is short - you need to carefully examine everything, ring the device where it closes. As for the observance of phase and zero - you need to look at the notation on the box. There are LED drivers on which the terminals are marked - it is indicated where the phase is, and where it is zero, but sometimes it is not indicated - the power cord is immediately plugged into the network or the terminals are simply not marked - that is, you can connect to the network without observing the phase and zero .