Regarding the issue of zero wire bridging in the control circuits within the distribution cabinet
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I’m facing a problem now: in the distribution cabinet, the neutral wires of the terminal blocks are connected by bridging from one circuit to the next. As a result, if there is a fault or break in the neutral wire of one circuit, it affects the subsequent circuit as well. We can also see that if the neutral wire is bridged, the higher-level circuit will affect the lower-level ones. Could any teacher tell us whether there are any standards or specifications that address this issue?
Same question: Does the standard allow the neutral wires of the control circuits to be connected together?