Selection of explosion-proof gaskets, waterproof connectors, and explosion-proof sealants
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I have an outdoor project, and the gas environment is Zone 1 explosion-proof. The current plan is to twist the wires at the outlet of the wire conduit; after twisting, an explosion-proof gland is used to connect to the armored cable. The protection rating of this gland is IP65, and I believe it can achieve both explosion protection and water resistance. The concern is that embedding the conduit tubes takes place during the initial civil engineering works; firstly, there’s a worry that the wall thickness of these tubes won’t meet the required standards, and secondly, dealing with such a large quantity of them in fixed locations makes construction difficult. I was wondering if anyone has any good solutions? I see there is a type of explosion-proof putty that I haven’t used yet. If I use that putty, do I still need to apply Gran as well? Please let those who are experienced give their opinions.
Explosion-proof putty is not waterproof. Many projects still use traditional methods; why not use armored cables with armored connectors, and then apply waterproof glue or silicone to provide an additional waterproof layer?
The explosion protection rating of the GRAN head is sufficient, and it can also provide good sealing for armored cables if installed correctly. As for explosion-proof putty, it is a type of mud that never dries out; it is generally used to seal holes and is commonly employed in the electrical field. The way you use this product is acceptable, but there is one thing you need to take into account: the specification of your conduit must be such that it has sufficient thickness to meet explosion-proof requirements. If the wire conduit is oriented with its opening facing upward, it’s still a good idea to seal that end with mortar, even if there is a gland there; after all, with the gland always facing upward, the waterproofing effect isn’t reliable.
Thank you so much! I’m also worried that the wall thickness of the embedded pipes does not meet the standards. Most of them are pipes that need to be pushed in; I’m also planning to buy some explosion-proof putty.
Thank you so much! I’m using a Gran with armor; I really hadn’t thought of using waterproof glue – thanks for the reminder