Wiring standards for galvanized wire conduit
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Dear experts, I would like to ask about the wiring conduit that runs downward from above: to what extent should its lowest point be below the wiring inlet of the instrument it is connected to? What are the relevant standards? Thank you
It appears in 7.3.6 of SHT3019 and 8.4.7 of SHT3521; HGT20512 and GB50493 also have it, so I won’t check each one individually. The main purpose is to prevent rainwater from entering the instrument through the cables (being explosion-proof does not mean it is waterproof)
Wrong, it’s GB50093 (GBT50493 applies to gases)