* The simplest and most economical solution for power transfer is Securitron’s surface mounted door cord. this unit is furnished with Securitron’s Touch Sense Bar but may also be purchased separately. * The cord consists of an 36" (920 mm) length of armored stainless steel cable together with plastic end pieces. 3/8" (9.5 mm) holes are drilled in the face of the door and frame to admit the cord and the end pieces are screwed down over the holes to create a neat, finished appearance. * The door cord comes furnished with end pieces set in two colors: light gray and black. This allows selection of end pieces color so as to bland into the door/frame color as much as possible. * The ample 36" cord length allows use of any type of door, including center pivot doors and doors that open well past 90 deg. * The TSB-C cable has an interior diameter of .25" (6mm) which will support interior wire cables up to .2" (5mm) thick. T * his permits employing thick enough wiring for most high current applications. * Compared to the Electric Hinge and Electric Power Transfer, however, the door cord is more vulnerable to vandalism and is visible on the door.