Use Of Barrier Cable Glands

As you can see from the diagrams above some of traditional applications where you may find the need for the use of barrier glands has changed while other specific applications have not.

Use of barrier cable glands.

New rules barrier gland ex d. We commonly use a barrier gland to seal the cable entry in an ex d box to prevent that flame propagation. The use of non barrier glands for direct entry into ex d enclosures per iec 60079 14 2013 5th ed. Previously all junction boxes and indirect entry terminal boxes did not require barrier glands.

Capri ade 1fc non armored compound barrier cable gland. Ex p pressurized equipment may also necessitate the use of barrier glands. Go to capri ade 4f flameproof increased safety armored cable gland. However under the new edition unless the cable is at least 3m in length a barrier gland will be required.

A barrier gland is a cable gland that provides a seal around the individual cores of a cable to maintain the flameproof integrity of exd equipment. Capri ade 4f flameproof increased safety armored cable gland. Sealing cables to prevent migration of flammable gas or liquid is not usually needed for general equipment like lights junction boxes motors etc. Go to capri ade 5f gland for armored cable with anti rotation clamp.

These glands meet the requirements of iec 60079 1 and employ a compound seal or other sealing method around each core to prevent the migration of an explosion from within a piece of flameproof. With the increased use of unfilled and multicore cables in explosive gas atmospheres the use of barrier glands has become more necessary. Where necessary to prevent the drop in pressure the ingress of combustible gas or vapour by diffusion or to prevent leakage of protective gas wiring systems shall be sealed. Iec 60079 14 mandates the use of barrier glands to be fitted to the unfilled multicore cable especially on ex d equipment and where there is a risk of gas migration through the cable.

Note the use of non barrier glands even in a zone 1 iic environment with the connecting cable lengths exceed the 3 meter rule. The uk committee is unclear as to the justification for this change given that potential failures only arise after multiple ignitions. A cable glands sealed with setting compound barrier cable glands b cables and glands meeting all of the following. It is sometimes needed for process connected equipment like instrumentation where there is.

Barrier glands are also required for the following equipment.