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UL 609 Standard for Local Burglar Alarm Units and Systems Updated

burglar alarm photo

UL has announced a new edition of UL 609. UL 609 applies to “local burglar alarm units and systems.” The updated edition incorporates the revision to minimum spacing requirements. It can be purchased on the UL website.

Description*

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A Dash of Maxwell’s: A Maxwell’s Equations Primer – Part Two

Maxwell’s Equations are eloquently simple yet excruciatingly complex. Their first statement by James Clerk Maxwell in 1864 heralded the beginning of the age of radio and, one could argue, the age of modern electronics.

“These requirements cover construction, performance, and maintenance of local burglar-alarm units and systems for use in mercantile premises, mercantile safes and vaults, and bank safes and vaults.”

*Description from the UL website.

 

Photo by Arenamontanus

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