UL has announced the release of a new edition of UL 634. UL 634 applies to “connectors and switches for use with burlar-alarm systems.” The updated edition can be purchased on UL’s website.
“These requirements cover connectors and switches for use with burglar-alarm systems in mercantile premises, mercantile safes and vaults, bank safes and vaults, government and corporate locations, and residences. They are intended to be used in circuits of limited energy, for these applications, in accordance with Article 725 of the National Electrical Code, NFPA 70.”
*Description from UL website.