What is the most common practice for running electric power from a frame to the door and hardware?

Electrical hinges or a power transfer units are the most commonly used practices to run electric power to locks and/or strikes.

Electric Hinges:

  • Most electric hinges will fit into a standard 4 1/2" or 5" hinge preparation with a modification the the reinforcing for the wire to pass through. Electric hinges are recommended to be used in the center hinge position.

Power Transfers:

  • There are two common types of power transfer units; surface or concealed:
    • Surface power transfers (armored door cord, door loop) are considered the most economical solution and can be used on existing openings, or prepared in the field for new construction. Consult local AHJ for fire rated openings.
    • Concealed units  (EPT's) are factory prepared and approved for fire rated openings.

When electric hinges or power transfers are used with electrical locks and/or strikes a conduit (raceway) is recommended in the door. The conduit is run from hinge side preparation to lock/strike preparation. When used with electrical panic devices, most electrical connections are through the hinge side mounting of device and no conduit is required in the door.

No conduit is supplied in frame and must be done in field at time of installation.


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