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Here you can find information and learning resources, such as "What is a T-Rating", How to choose the correct Cable Gland, How are IP Ratings calculated, cable gland naming and more.
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Cable Gland Names
The table below outlines generic cable gland nomeclature used across both industrial and hazardous area industries. Looking for a double seal gland for terminating a braided cable into an Exe enclosure? Then you need an E1XE cable gland. Specification calls for an A2E cable gland? Then you will need an Exe certified gland with single seal for unarmoured cables.
Of course, this alone may not be sufficient in specifying a cable gland for every application. More information on the environment, material, certification and applicable standards amongst other things must be taken into consideration. If you need help with any aspect of cable gland specification or selection, please reach out to us. With over 20+ years of experience in cable gland design, selection, certification and termination we are here to help
T-Ratings
Temperature Classification (T-Class or T-Rating) is based on the maximum temperature which any relevant part of the equipment which may be in contact with a flammable (explosive) gas, can reach.
This classification identifies the minimum ignition temperature threshold for the hazardous area and is related to the auto-ignition temperature of the hazardous material. In other words, in order for the explosive or combustible environment to ignite, it would need to be subjected to a temperature in excess of the T-rating temperature..
T-rating classification run from T1 to T6. For NEC500 these are further split into various sub-divisions
A T-Rating of T1 means the minimum ignition temperature of the gas present is >450° C whereas a classification of T6 means the minimum ignition temperature is >85° C based on – 20ºC to + 40ºC ambient air temperature.
A T-Rating of T1 means the maximum surface temperature generated by the instrument at 40° C is 450° C. A T-Rating of T6 means the maximum surface temperature generated by the equipment is 85° C. Hazardous area electrical equipment maybe designed for use in higher ambient temperatures, which would be indicated on the certiication plate
ingress protection (ip)
IP or Ingress Protection ratings are defined in international standard EN 60529 (British BS EN 60529:1992, European IEC 60509:1989). They are used to define levels of sealing effectiveness of electrical enclosures and other equipment against intrusion from foreign bodies (tools, dirt etc) and moisture.
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The numbers that follow IP each have a specific meaning, as outlined in the table below. The first indicates the degree of protection (of people) from moving parts, as well as the protection of enclosed equipment from foreign bodies. The second defines the protection level that the enclosure enjoys from various forms of moisture (drips, sprays, submersion etc).
hazardous area cable gland selection
For help in selecting the correct cable gland from our range, see the handy table below. This table is intended as a guide only - please check with local legislation, site standards, cable manufacturer etc for complete clarity
