Regarding the grounding issue, experts, stop here!
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As shown in the figure, what are the main differences between continuous and segmented approaches, and what is the purpose of each? Thank you for the guidance
Do it in the most convenient way possible. Normally, it is grounded at one end of the control cabinet for easy inspection. But perhaps the junction box was not designed with connection terminals in mind, so grounding may be required at the junction box end.
Upon close inspection of the diagram, it can be seen that the separate shielding layers are required to be grounded at a single point. In Figure A-1, the separate shielding layers of the branch cables and the main cable are connected together, and then grounded at a single point on the cabinet side. Figure A-2 shows that on the junction box side, the separate shielding layer of the branch cable is grounded, while on the cabinet side, the separate shielding layer of the main cable is grounded. It’s that simple: one is grounded by being connected together, while the other is grounded by being divided into two sections. There isn’t much difference; as the person on the second floor said, it depends on what’s more convenient for you.
I just want to know what it means for the armor layer to be grounded Rather, it is double-ended grounded.
Thank you for the guidance. In Figure A-2, how are SC and AM connected together?
Isn’t it great to have unified grounding at the cabinet level?
It’s not about whether it smells good or not; there are rules for that:lol
In general, protective grounding and working grounding in on-site construction are combined. I’ve never seen them separated; I’ve learned about it*.
???It’s because they’re all grounded to the same ground point; it seems like you don’t understand the principle behind this I really don’t know what to say – your SC and AM have the same grounding property, so of course they can be connected to the same ground
It usually presses down on Gran’s head.
Literally speaking, A-1 is continuous; the shielding grounding requires one end to be grounded, so the shielding of the branch cables and the split sections of the main cable are connected together through terminal blocks in the junction box, with grounding being carried out at the cabinet (the junction box requires 12 additional terminals). A-2 is segmented: the shielding of the branch cables is grounded at the junction box, while the split sections of the main cable are grounded at the cabinet. Any of the schemes can be used; the key factor is custom practice or company requirements. It should also be noted that for the main cables in the master screen + split-screen configuration, the master screen is connected to ground for protection purposes, while the split screens are connected to ground for operational use (in some cases). For more details, refer to the instrument design specifications.