I’m not quite sure about the notation for cable trays
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The notation for cable trunking is: XQJ -- style -- category -- specifications. Everything else is clear, but regarding the notation for the category, does it vary from manufacturer to manufacturer? For example, it is expressed this way. Straight pipe section – A, horizontal elbow – B, horizontal tee – C, horizontal cross – D, vertical upward elbow – E, vertical upward tee – F (the numbers following the English terms also have different meanings). However, when searching on Baidu, there are also different notations (with only A, B, and C used). I checked the national standard for cable trays: QBT1453-2003, but it doesn’t provide any explanations either; is there no **uniform standard code?
The standard JB/T 10216-2013 on cable trays for electrical control and power distribution provides detailed regulations.