Are the ND series locks UL listed?

ND series locks are UL listed for both single and pair of fire doors.

ND series UL listing for single fire doors
ND series lock with ½” throw latchbolt is approved for up to 3 hours on single doors up to 4’-0” x 10’-0”

ND Series UL listing for pair of fire doors
  • ND series Lock with ¾” throw latchbolt is approved for up to 3 hours on pairs of doors up to 8’-0” x 8’-0” 
  • ND series Lock with ¾” throw latchbolt is approved for up to 1-1/2 hours on pairs of doors up to 8’-0” x 10’-0” 



For more iniformation visit UL certification directory here


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