Ok, Sergio,

I live in a Ex world! You are quite correct good working practice then cables enter from the bottom elevation as on the top water can run down the cable then pool on top elevation and possibly enter the enclosure. Now even if gland does enter the bottom, liquid can run down face of enclosure along bottom elevation and Im sure we have all seen it the shroud ends up full of water and you get your hands wet removing the shroud!

A shroud is only as good as the person fitting it, so it really doesnt offer any formal IP rating thats down to the type of gland you fitted.BW/CW and what is IP rating is, you construct gland as per manufacturers instructions taking into account cable type and size of conductor/s and your correctly selected and fitted CW gland will provide the IP rating equal to or higher than enclosure it was fitted into.

Agreed Shroud can keep gland clean/ish, but you may and will still get condensation and liquid/water entering the gland.

Go forwards into a Ex or chemical world and instead of rainwater inside the shroud you now have acid/alkali due to chemical in the atmosphere or indeed liquids from the process itself, not been the first where a unsuspecting technician pulls down the shoroud and lets out a scream due to the acid/alkali liquid collected in the shroud.  

In vast majority of cases shrouds in a Ex world are just not encoraged at all. The gland itself does the IP Rating thru its parts and correct assesmbly by a competant person and any IP washer that may be needed depending of type of entry into the enclosure e.g clearance hole or threaded entry  and what the enclosures certified IP rating is.

So Ex glands typically are rated IP66 some IP67, again select the right Ex gland based on the Ex method of protection of the enclosure, cable type and size and fitted by a competent person.

Ex glands can be purchased as Brass, Nickle Plated, and two diffrent grades of stanless steel, so its the deisgner and installer selecting material suitable for the environment. In majority of these glands its the "Back Nut" that does the job of the shroud plus depending on manufacturer of gland internal "O" rings.

In fact if any shrouds were to be fitted installers are told to cut them off.

Look at https://www.hubbell.com/hawke/en/Products/Electrical-Electronic/Cable-Glands/Hazardous-Location/501453UNIV-Ex-d-Ex-e-Cable-Gland/p/3913696

Yes, gland manufacturers will sell you shrouds, of course they will, may even be in the packet with the glands, but doesnt mean you fit them.

The above link takes you to a pretty common make/type of gland, it even goes as far as being IP68 rated, The black coloured ring in middle of gland is the deluge seal, so that is an option if your installation has a deluge fire fighting system, so the 501/453 UNIV glands can be ordered without that seal.

I hope the above helps, but 99% of Ex Glands we never fit shrouds.

Cheers GTB

Ok, Sergio,

I live in a Ex world! You are quite correct good working practice then cables enter from the bottom elevation as on the top water can run down the cable then pool on top elevation and possibly enter the enclosure. Now even if gland does enter the bottom, liquid can run down face of enclosure along bottom elevation and Im sure we have all seen it the shroud ends up full of water and you get your hands wet removing the shroud!

A shroud is only as good as the person fitting it, so it really doesnt offer any formal IP rating thats down to the type of gland you fitted.BW/CW and what is IP rating is, you construct gland as per manufacturers instructions taking into account cable type and size of conductor/s and your correctly selected and fitted CW gland will provide the IP rating equal to or higher than enclosure it was fitted into.

Agreed Shroud can keep gland clean/ish, but you may and will still get condensation and liquid/water entering the gland.

Go forwards into a Ex or chemical world and instead of rainwater inside the shroud you now have acid/alkali due to chemical in the atmosphere or indeed liquids from the process itself, not been the first where a unsuspecting technician pulls down the shoroud and lets out a scream due to the acid/alkali liquid collected in the shroud.  

In vast majority of cases shrouds in a Ex world are just not encoraged at all. The gland itself does the IP Rating thru its parts and correct assesmbly by a competant person and any IP washer that may be needed depending of type of entry into the enclosure e.g clearance hole or threaded entry  and what the enclosures certified IP rating is.

So Ex glands typically are rated IP66 some IP67, again select the right Ex gland based on the Ex method of protection of the enclosure, cable type and size and fitted by a competent person.

Ex glands can be purchased as Brass, Nickle Plated, and two diffrent grades of stanless steel, so its the deisgner and installer selecting material suitable for the environment. In majority of these glands its the "Back Nut" that does the job of the shroud plus depending on manufacturer of gland internal "O" rings.

In fact if any shrouds were to be fitted installers are told to cut them off.

Look at https://www.hubbell.com/hawke/en/Products/Electrical-Electronic/Cable-Glands/Hazardous-Location/501453UNIV-Ex-d-Ex-e-Cable-Gland/p/3913696

Yes, gland manufacturers will sell you shrouds, of course they will, may even be in the packet with the glands, but doesnt mean you fit them.

The above link takes you to a pretty common make/type of gland, it even goes as far as being IP68 rated, The black coloured ring in middle of gland is the deluge seal, so that is an option if your installation has a deluge fire fighting system, so the 501/453 UNIV glands can be ordered without that seal.

I hope the above helps, but 99% of Ex Glands we never fit shrouds.

Cheers GTB