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be so arranged that the facilities are automatically connected to
the secondary power supply on failure of the primary source of
power.
8.1.7 For a runway meant for take-off in runway visual
range conditions less than a value of 800 m, a secondary
power supply capable of meeting the relevant requirements of
Table 8- 1 shall be provided.
8.1.8 Recommendation.- At an aerodrome where the
primary runway is a non-precision appmach runway, a
secondary power supply capable of meeting the requirements
of Table 8-1 should be provided except that a secondary power
supply for visual aicis need not be pmvided for more than one
non-precision appmach runway.
8.1.9 Recommendation.- At an aerodrome where the
primary runway is a non-instrument runway, a secondary
power supply capable of meeting the requirements of 8.1.4
should be provided, except that a secondary power supply for
visual aicis need not be provided when an emergency lighting
system in accordance with the specifcation of 5.3.2 is
provided and capable of being deployed in 15 minutes.
8.1.10 Recommendation.- The following aerodrome
facilities should be pmvided with a secondary power supply
capable of supplying power when them is a failure of the
primary power supply:
a) the signalling lamp and the minimum lighting necessary
to enable air traftic services personnel to carry out their
duties;
Note.- The requirement for minimum lighting may
be met by other than electrical means.
ANNEX 14 - VOLUME I & 1
Annex 14 - Aerodromes Volume I
b) all obstacle lights which, in the opinion of the
appropriate authority, are essential to ensure the safe
operation of aircraji;
c) appmach, runway and taxiway lighting as specified in
8.1.6 to 8.1.9;
d) meteomlogical equipment;
e) essential security lighting, if provided in accordance
with 9.11;
fi essential equipment and facilities for the aerodrome
responding emergency agencies;
g) floodlighting on a designated isolated aircrafi parking
position ifpmvided in accordance with 5.3.23.1; and
h) illumination of apmn areas over which passengers may
walk.
Note.- Specrfications for secondary power supply for
radio navigation aidr and ground elements of communications
systems are given in Anne. 10, Volume I, Chapter 2.
8.1 -1 1 Recommendation.- Requirements for a secondary
power supply should be met by either of the following:
- independent public power; which is a source of power
supplying the aemdmme servicefrom a substation other
than the normal substation through a transmission line
following a route d~erentfm m the normal power
supply mute and such that the possibility of a
simultaneous failure of the normal and independent
public power supplies is extremely Emote; or
- standby power unit($, which are engine generators,
batteries, etc., fmm which electric power can be
obtained.
Note.- Guidance on electrical systems is included in the
Aerodrome Design Manual, Part 5.
8.2 System' design
8.2.1 For a runway meant for use in runway visual range
conditions less than a value of 550 m, the electrical systems
for the power supply, lighting and control of the lighting
systems included in Table 8-1 shall be so designed that an
equipment failure will not leave the pilot with inadequate
visual guidance or misleading information.
Note.- Guidance on means of providing this protection is
given in the Aerodrome Design Manual, Part 5.
8.2.2 Where the secondary power supply of an aerodrome
is provided by the use of duplicate feeders, such supplies shall
be physically and electrically separate so as to ensure the
required level of availability and independence.
8.2.3 Where a runway forming part of a standard taxiroute
is provided with runway lighting and taxiway lighting,
the lighting systems shall be interlocked to preclude the
possibility of simultaneous operation of both fonns of lighting.
83 Monitoring
Note.- Guidance on this subject is given in the Aerodrome
Design Manual, Part 5.
8.3.1 Recommendation.- A system of monitoring
should be employed to indicate the operational status of the
lighting systems.
8.3.2 Where lighting systems are used for aircrafi control
purposes, such systems shall be monitored automatically so as
to provide an indication of any fault which may affect the
control functions. This information shall be automatically
relayed to the air traffic service unit.
8.3.3 Recommendation.- Where a change in the operational
status of lights has occurred, an indication should be
provided within two seconds for a stop bar at a runwayholding
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