NCC 2019 Volume One
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Specification E2.2d Residential fire safety systems
1. Application
This Specification describes the requirements for residential fire safety systems referenced in Specification E1.5a.
Clause 2 applies to Class 3 residential care buildings. It covers installation requirements for local fire indicator panels (or alarm panels) that provide information to staff when a fire alarm is activated.
Clause 3 describes requirements for connecting residential sprinkler systems in Class 2 and 3 buildings or a residential care building, to a fire station or other approved monitoring service.
2. Residential local fire alarm systems — Residential care buildings
(a)
General requirements:
(i)
This Clause applies to Class 3 residential care buildings.
(ii)
The installation must consist of a system of smoke alarms powered either—
(A)
directly from the low voltage supply mains; or
(B)
from an extra-low voltage power source originating at a local fire indicator panel with a battery back-up facility.
(iii)
A smoke detector complying with AS 1670.1 Clause 2.1.2(a)(ii), (xi) or (xv) may be substituted for a smoke alarm, provided an audible alarm device is associated with each detector.
(iv)
The sound pressure level provided by a warning device must be equivalent to that required in Clause 3.22 of AS 1670.1, except that the sound pressure level need not be measured inside a sole-occupancy unit, provided that a level of not less than 85 dB(A) is attained at the access door to the unit.
(v)
The alarm system must be wired for low voltage or extra-low voltage wiring.
(vi)
The system must be designed so—
(A)
an audible alarm is given in the area in which the smoke alarm activates; and
(B)
visible and audible indication of an alarm is provided at the local fire indicator panel; and
(C)
an audible alarm is given in any area (including sleeping quarters and staff outbuildings) set aside for staff use.
(vii)
The maximum number of smoke alarms on any one alarm zone must—
(A)
be determined by the maximum current output rating of the system source; and
(B)
not exceed 10.
(viii)
Each alarm zone must be located around a single central access passageway, corridor or similar thoroughfare, to enable staff to readily identify the source of the alarm.
(ix)
Where the smoke alarm is functionally dependent on an external power source, an audible fault signal must sound at the local fire indicator panel if that power source fails. The local fire indicator panel must be permanently connected to a reliable 240 V separate low voltage final sub-circuit. Source power must be protected by a separate circuit breaker, or fuse, supplied from the live side of the main switch.
(x)
The smoke alarm system is not required to be connected to a fire alarm monitoring system (refer to Clause 2(b)(iii) of Specification E1.5a.
(b)
Local fire indicator panel:
(i)
The local fire indicator panel must be located in a central area, such as a reception area, so that it is readily accessible by staff at all times.
(ii)
The local fire indicator panel must be fixed wired.
(iii)
The local fire indicator panel must incorporate the following:
(A)
A suitable mains power supply with battery back-up (capable of operating the system for 12 hours) for the local fire indicator panel and extra-low voltage smoke alarms supplied directly from the local fire indicator panel.
(B)
Terminals for input signal conductors from the smoke alarm and residential sprinkler system. If the signal source is from a low voltage smoke alarm external isolation must be provided.
(C)
Visible indication of the alarm zone in which the actuating device is located.
(D)
Automatic audible and visible indication of the following faults:
(aa)
A break in the wiring of any circuit between smoke alarms or sprinkler alarm switch and the local fire indicator panel.
(bb)
Low battery condition.
(E)
Automatic visible indication of mains power failure.
(F)
Initiation of any ancillary control facilities such as smoke door release or air-conditioning shut-down.
(G)
Local operation of individual smoke alarms, in the event of alarm zone isolation at the local fire indicator panel.
(iv)
If the local fire indicator panel is also used for other non-fire related purposes such as security, then these functions must be on separate and distinct circuits. When disabled or isolated, these functions must not interfere with the operation of fire alarm circuitry.
(v)
The local fire indicator panel must comply with AS 1670.1.
(vi)
The local fire indicator panel must have the capacity to incorporate heat detectors deemed suitable in accordance with AS 1670.1 on either the same or separate alarm zones as the smoke alarms.
(c)
Smoke alarms:
(i)
Extra-low voltage smoke alarms must be compatible with the local fire indicator panel.
(ii)
Low voltage smoke alarms must be configured to send an output alarm signal to the local fire indicator panel.
(iii)
Unless there is internal isolation of the signal output conductors, they must at all times be treated as low voltage conductors.
(d)
Signal isolation interface units:
(i)
Signal isolation interface units must isolate any low voltage connected to the smoke alarms from the local fire indicator panel.
(ii)
Signal isolation interface units must be certified by an Accredited Testing Laboratory as compatible with the specific types of smoke alarms used in the system.
(iii)
Signal isolation interface units must be accepted by the electricity supply authority.
(iv)
Units must be marked in a clearly visible location, with letters greater than or equal to 35 mm containing the following information:
|
SMOKE ALARM SIGNAL ISOLATION UNIT WARNING — 240V |
|
Isolate power supply before removing cover |
(e)
Wiring:
(i)
Smoke alarms and associated equipment must be fixed wired for low voltage or extra-low voltage wiring systems, as applicable.
(ii)
All extra-low voltage wiring must be red sheathed 0.6/1 kV stranded, with conductors having a cross sectional area of not less than 0.75 mm2.
(iii)
Clear and concise "as-installed" single line drawings to a suitable scale, showing rooms, external and internal walls, fixed partitions, doorways etc., are to be provided for each installation at the local fire indicator panel.
(iv)
Drawings must also include the actual location of fire alarms, smoke alarms, sprinkler flow switches (where installed), alarm connection points and local fire indicator panel, to enable easy identification of alarm system elements and their relationship to the building layout. Symbols to be used are:
Flow Switch
Heat Detector
Smoke Detector
End-of-Line Device
Fire Indicator Panel
Smoke Alarm
3. Connection of residential sprinkler systems to a fire station or other approved monitoring service
(a)
Connection to monitoring service:
(i)
Connection of a residential sprinkler system to a fire station or other approved monitoring service must be via a sprinkler alarm switch, connected to alarm signaling equipment. The connection from the alarm signaling equipment must be in accordance with AS 1670.3.
(ii)
The alarm signaling equipment must be installed—
(A)
in a secure, accessible position; and
(B)
in a weatherproof housing, if located externally; and
(C)
not more than 500 mm from the system flow switch.
(b)
Indication at the fire indicator panel — the fire signal from the alarm signaling equipment must be mimicked by an audible and visible signal at the fire indicator panel.