For safety inspections, should the same numbering be used on the back of the electrical cabinets in the power distribution room as well? Where is it from? ?
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For safety inspections, should the same numbering be used on the back of the electrical cabinets in the power distribution room as well? Where is it from? ? Is it necessary to use transition joints when connecting explosion-proof conduit to explosion-proof switches, etc.? Where is this from? ? ?
【Should the same numbering be used on the back of the electrical cabinets in the distribution room as well? Where is it from? ? 】There are no specific regulations or sources provided; however, the markings make it easier to carry out the operations, especially for different people to perform them.
There are industry regulations. There are slight differences in the numbering for low voltage and high voltage. In our company, for high-voltage equipment (switchgear), the numbering follows this rule: the first (second) digit is related to the voltage level, and the subsequent digits represent a sequence number; even numbers indicate section II, while odd numbers indicate section I. However, there are specific numerical codes for high voltage; for example, 1101: the 1 represents 1 section, 10 indicates a voltage level of 10 KV, and the last digit represents the cabinet number, that is, which high-voltage cabinet it is. For low voltage, for example, in 4003, the 4 indicates 0.4 KV, and the 3 denotes the third low-voltage cabinet. After the number, the name of the distribution cabinet can be added, such as XXX switch, followed by the cabinet number 4003. For low-voltage distribution cabinets, reference can be made to JB/T 3752.1-1999 \"Method for coding product models of low-voltage switchgear and control equipment – Part 1: Low-voltage switchgear.\" It is recommended to refer to standards as much as possible, so that it will be easier to manage when new technical staff join the company
Thank you; it seems there is no requirement for a serial number on the back~
“I’m not sure about this “must”.
The first one refers to the numbering of electrical cabinets in the distribution room; there is no **standard requirement for this. This measure is intended primarily to standardize the work done in the cabinet rooms, with the ultimate goal of ensuring visual clarity and ease of understanding. The second point regarding the transition joint is indeed unclear.