Stairway locking devices shall be so wired that when it is desired to de-energize these devices it shall not affect any other devices in the building, such as automatic door holders, nor shall a trouble signal be initiated in the fire alarm system. Doors shall automatically unlock when the fire alarm system is in the alarm mode or whenever there is a loss of power.
Exception: Fire department stairways installed as per Section 15.100.040 of this chapter. (Prior code §§ 9.28.1277, 15.18.1801)