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A keyswitch in a Dover/ThyssenKrupp elevator. Stands for "HoistWay access ENABle" The HWENAB switch allows an elevator car to be moved with the doors open from the hoistway access switch at a terminal (top or bottom) landing.
If you want to get into the elevator pit, turn the HWENAB switch on, then use the hoistway access switch in the hallway.
by Matt October 07, 2004
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