UL - 80079-37
UL Standard for Safety Explosive Atmospheres – Part 37: Non-Electrical Equipment for Explosive Atmospheres – Non Electrical Type of Protection Constructional Safety “c”, Control of Ignition Source “b”, Liquid Immersion “k”
|Publication Date:||2 June 2021|
This standard specifies the requirements for the design and construction of non-electrical equipment, intended for use in explosive atmospheres, protected by the types of protection constructional safety "c", control of ignition source "b" and liquid immersion "k".
This standard supplements and modifies the requirements in UL 80079-36. Where a requirement of this standard conflicts with the requirement of UL 80079-36 the requirement of this standard takes precedence.
Types of Protection "c", "k" and "b" are not applicable for Group I, EPL Ma.
The types of ignition protection described in the standard can be used either on their own or in combination with each other to meet the requirements for equipment of Group II, and Group III depending on the ignition hazard assessment in UL 80079-36.
Where references are made to IEC and ISO standards, the referenced requirements found in these standards shall apply as modified by any applicable US National Differences for that standard (see clause 2).
NOTE In the US, the authority having jurisdiction for underground mines is the Mine Safety and Health Administration (MSHA) of the federal government. There are additional regulations beyond the requirements detailed here that will also apply.