UL 60079-25
Explosive Atmospheres – Part 25: Intrinsically Safe Electrical Systems
standard by Underwriters Laboratories, 11/20/2015
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Explosive Atmospheres – Part 25: Intrinsically Safe Electrical Systems
standard by Underwriters Laboratories, 11/20/2015
Standard for Low-Voltage Switchgear and Controlgear – Part 5-2: Control circuit devices and switching elements – Proximity switches
standard by Underwriters Laboratories, 03/28/2014