Questions about explosion-proof junction boxes
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I would like to ask everyone, the spare port of an explosion-proof junction box is often sealed with a plastic plug. Do I have to replace the plastic plug when using it in an explosion-proof area, as shown in the picture below?
Yes, replace it with an explosion-proof gland plug, otherwise it will be brought up during inspection.
If it is an explosion-proof non-metallic junction box, is it okay to use this kind of plug made of the same material as the box body?
First let me ask you, does this plug have an explosion-proof level?
. If it is the connector that comes with the explosion-proof junction box, it should meet the explosion-proof requirements. If you make your own joints, you should choose explosion-proof joints. ； It doesn’t matter if it’s plastic or not. But if the cable is flame-retardant, the connector should also be flame-retardant (this sentence is nonsense, explosion-proof connectors are all flame-retardant).
There's no sign on it, probably not
Without the explosion-proof label, there is no way to judge whether this plug can meet the sealing requirements of this explosion-proof equipment.
Can anyone send a picture of the explosion-proof marking of the sealing parts?
Choose and replace the corresponding explosion-proof plug according to the explosion-proof level of your site!
This plastic plug is just to prevent the internal threads from being damaged during transportation. In actual applications, unused inlets and outlets must be blocked with explosion-proof plugs.