which wire size is used on electrified hinge

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Steelcraft follows the industry standards for hinge reinforcement and preparation for both door and frame. Unless otherwise specified all products prepared for butt hinges will have mounting holes ...
  For Product Shipped Prior to August 2012 using the old (black) potted module: a.       0-100 ft 14 gauge wire b.      0-200 ft 12...
 
The electrified hinge can be used on QEL exit devices.
Can a cam lift hinge have an EPT? No, it can't have an EPT.  The operation of the hinge can crimp any wires used for an EPT.