Specifications for the use of cables in explosion-proof areas
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Dear experts, may I ask about explosion-proof warehouses, explosion-proof device areas, and explosion-proof tank areas?； When using flame-retardant cables, can protective sleeves be omitted if they are in a armored version? Are there any detailed specifications and standards! Thank you!
Generally speaking, in explosion-proof areas, armored cables do not require protective sleeves, but it is also necessary to consider whether there are other risk factors present on site such as water/oil/mud/dust, etc. For the selection and wiring of cables in explosion-proof areas, the following standards can be referred to. 1. Basic requirements, IEC 60079-14, corresponding to GB3836-15, Chapter 9 ； 2. Related to instruments: HG/T 20512-2014 Code for Design of Instrument Piping and Wiring ； 3. Other relevant items: GB 50058-2014 Code for Design of Electrical Installations in Explosive Atmospheres, Chapter 5.4 ； It’s possible to look at more similar cases.
In explosion-proof environments, wiring can be done using steel pipes or cables; there is no requirement to use protective sleeves
Most of them use protective sleeves and unarmored cables. I’ve only encountered armored cables where the grounding lead is used