Montgomery County                           2823

(a)    Annunciators. Annunciators shall be of the lamp type,
so arranged and connected as to provide a visible signal for each
zone or area from which a fire alarm signal originates. For the pur-
pose of this Article in determining the number of annunciator signal
lamps, a zone or area shall consist of approximately 10,000 square
feet and there shall be not less than one annunciator lamp for each
floor of a multi-story building. Where two or more buildings are
covered by one local fire alarm system, an annunciator shall be in-
stalled in each building, together with a pilot signal lamp on each
annunciator to indicate in which building the alarm originates. The
annunciator location shall be adjacent to the main entrance to the
building, or adjacent to the telephone switchboard, or as directed by
the Fire Marshal.

(b)    Bells. Bells shall be of an approved type and conform
to the provisions of the Section designated as "Bells, Horns, or Gongs."

(c)    Number on a circuit. Bells shall be connected in multiple
with not more than twelve on a circuit.

83-45. Coded systems.

The code ringing type of local fire alarm system shall be such
that all alarm circuits, striking station circuits, instruments, and
apparatus, are constantly under electrical supervision so arranged
that failure of any circuit of the system or failure of operating current
will be automatically indicated by approved disarrangement signal
devices giving a visual and audible signal.

(a)    Type. Coded systems shall be of the approved closed
circuit type, electrically supervised and equipped with an approved
punch register.

(b)    Bells. Bells shall conform to the provisions of the Section
designated as "Bells, Horns, or Gongs."

(c)    Number on a circuit. Alarm bells used with an elec-
trically supervised code ringing system shall have not more than 14
bells on direct current, or 10 bells on alternating current, connected
in series on a loop from the control panel. The circuits from the
control panel shall be so arranged that no load on any branch circuit
shall exceed 12 amperes.

(d)    Operation in buildings used for sleeping. In buildings
used for sleeping purposes, except hospitals, such a system shall be
so arranged that after sounding not less than four rounds of the
code, within a period of not over twenty seconds, thereafter, the
bells will ring continuously until purposely silenced.

(e)    Control panel. Each coded fire alarm system shall be
equipped with a control panel expressly designed and approved for
the operation and supervision of the system with which it is to be