(a) Annunciators used in connection with presignal type interior fire alarm systems shall be of an approved closed circuit type.
(b) Annunciators shall have relays of approved type and shall be equipped with suitable target, shutter or other indicating device, each marked with a suitable description of the purpose it serves and requiring manual reset after operation.
(c) Annunciators shall be so designed that they will indicate trouble on any circuit, control board or at any other point on an interior fire alarm system, by visible and audible signals. The indicating devices on trouble annunciators shall reset automatically when the cause of trouble has been removed.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)