Section
4 Lighting systems
4.1 Lighting - General
4.1.1 The
lighting systems are to be arranged such that a single failure will
not cause total loss of illumination in any attended compartment.
4.1.2 In the
event of loss of main lighting, at locations where illumination must
be maintained for operational purposes, transitional lighting shall
be provided until the main lighting is restored or emergency lighting
is operational. The transitional lighting is to be available for a
period acceptable to the Naval Administration.
4.1.3 To meet
operational requirements, lighting levels are to be controllable locally.
4.1.4 Lamp
holders, lamps and light fittings are to be in accordance with IEC
60092-306, Electrical installations in ships – Part 306:
Equipment – Luminaires and lighting accessories.
4.1.5 Fittings,
reactors, capacitors and other auxiliaries are not to be mounted on
surfaces which are subject to high temperatures. If mounted separately
they are additionally to be enclosed in an earthed conductive casing.
4.1.6 Where
capacitors of 0,5 microfarads and above are installed, means are to
be provided to promptly discharge the capacitors on disconnection
of the supply.
4.2 Discharge lighting
4.2.1 Discharge
lamps operating in excess of 250 V are only acceptable as fixed fittings.
Warning notices calling attention to the voltage are to be permanently
displayed at points of access to the lamps and where otherwise necessary.
4.3 Lighting circuits
4.3.1 Lighting
circuits are to be supplied by final sub-circuits separate from those
for heating and power. This does not preclude the supply from a lighting
circuit supplying a single fixed appliance, such as a cabin fan, a
dry shaver, a wardrobe or anti-condensation heater, taking a maximum
current of 2 A.
4.3.2 Lighting
for the following spaces is to be supplied from at least two final
sub-circuits in such a way that failure of one of the circuits does
not leave the space in darkness. One of these circuits may be an emergency
circuit provided it is normally energised.
- Spaces that are required to be lit for the safe working of the
ship, such as control stations, normal working spaces, etc.
- Spaces where there may be a hazard due to movement of crew, embarked
personnel and/or equipment, such as in corridors, working passage
ways, stairways leading to boat decks, crew and embarked personnel
rooms, etc.
- Spaces where there may be a hazard due to moving machinery and
hot parts, such as in machinery spaces, workshops, large galleys,
laundries, etc.
4.3.3 Lighting
for enclosed hazardous spaces is to be supplied from at least two
final sub-circuits to permit light from one circuit to be retained
while maintenance is carried out on the other. One of these circuits
may be an emergency circuit, provided it is normally energised in
which case the arrangements are to comply with Vol 2, Pt 9, Ch 2, 5 Emergency and alternative sources of electrical power.
4.3.4 Lighting
of unattended spaces, such as store spaces, is to be controlled by
multi-pole linked switches situated outside such spaces. Provision
is to be made for the complete isolation of these circuits and locking
the means of control in the off position.
4.4 Emergency lighting
4.4.1 For
the purpose of this section emergency lighting, contingency lighting,
transitional emergency lighting and supplementary emergency lighting
are hereafter referred to under the generic name ‘emergency
lighting’.
4.4.2 A fire
or other casualty in a space containing a source of electrical power
associated transforming (or converting) equipment or switchboard serving
lighting, is not to render inoperative both main lighting and emergency
lighting.
4.4.4 The exit(s) from every main compartment occupied by crew and embarked
personnel is to be continuously illuminated by an emergency lighting fitting. These are
to include, but are not limited to:
- Accommodation spaces such as corridors, heads and bathrooms, cabins, offices,
mess decks, hospitals, pantries containing no cooking appliances, and similar
spaces;
- Service spaces such as spaces used for galleys, pantries containing cooking
appliances, lockers, mail and specie rooms, storerooms, workshops other than those
forming part of the machinery spaces, and similar spaces and trunks to such
spaces.
4.4.6 Switches are not to be installed in the final sub-circuits to emergency
light fittings unless the light fittings are serving normally unmanned spaces, (e.g.
storage-rooms, cold rooms, etc.), or they are normally required to be extinguished for
operational reasons, e.g. for night visibility from the navigating bridge. Where
switches are fitted they are to be accessible only to ship's crew and embarked personnel
with provision made to ensure that the emergency lighting is energised when such spaces
are manned and/or during emergency conditions. Where ‘darken ship’ requirements are
specified, switches may be installed in the circuits to emergency light fittings
(including transitional lighting) provided they are clearly identified.
4.4.7 Where
emergency lighting fittings are connected to dimmers, provision is
to be made, upon the loss of the main lighting, to automatically restore
them to their normal level of illumination.
4.4.8 Fittings
are to be specially marked to indicate that they form part of the
emergency lighting system.
4.4.9 A means
of illumination is to be provided in passageways and manned compartments
for a period of at least four hours in the event of a failure of all
main and emergency lighting. The provision of lanterns that operate
automatically from a self contained power source on failure of the
main and emergency lighting systems is the minimum acceptable arrangement.
4.5 Navigation lights
4.5.2 Each
navigation light is to be controlled and protected in each insulated
pole by a switch and fuse or circuit-breaker mounted on the distribution
board.
4.5.3 Provision
is to be made on the navigating bridge for the navigation lights to
be transferred to an alternative circuit fed from the main source
of electrical power. See also
Vol 2, Pt 9, Ch 2, 5.1 General 5.1.4.
4.5.4 Each
navigation light is to be provided with an automatic indicator giving
audible and/or visual indication of failure of the light. If an audible
device alone is fitted, it is to be connected to an independent source
of supply, e.g. a battery, with means provided to test this supply.
If a visual signal is used connected in series with the navigation
light, means are to be provided to prevent extinction of the navigation
light due to failure of the signal. The requirements of this paragraph
do not apply to small vessels.
4.5.6 To satisfy Vol 2, Pt 9, Ch 6, 4.5 Navigation lights 4.5.5, an
audible and visual alarm is to be activated to notify the bridge Officer of the Watch
when the luminous intensity of the light reduces below the level required by the IMO
Convention on the International Regulations for Preventing Collisions at Sea.
Alternative measures to ensure continuing acceptable performance of navigation lights
using light emitting diodes may be considered that are in accordance with:
- IMO Res. MSC.253(83), Performance Standards for Navigation
Lights, Navigation Light Controllers and associated Equipment,
and
- EN 14744, Inland navigation vessels and sea-going vessels
– Navigation light, or a relevant National, International
or Naval Standard.
Where alternative measures are proposed that require verification
by personnel of the luminous intensity of navigation lights using
light emitting diodes, details of the periodic inspection implementation
and acceptance by the Naval Administration are to be submitted for
consideration.
4.5.7 Navigation light power supply units installed to convert, control and/or
monitor the distribution board power supply required by Vol 2, Pt 9, Ch 6, 4.5 Navigation lights 4.5.1 above for
connection to the light source(s) (e.g. for LED type navigation lights) are, in the
event of a short-circuit on the unit output, to disconnect or limit the supply to
prevent further damage and activate an alarm.
4.5.8 Navigation
light power supply units are to be self-monitoring, detecting failures
of the unit itself and activating an alarm. These are to include:
4.5.9 The
navigation light power supply failure alarms required by Vol 2, Pt 9, Ch 7, 4.7 Valve control and indication systems 4.7.1 are not to be displayed
as a group alarm. Other navigation light alarms may be grouped for
each navigation light where means are provided for personnel to determine
the cause of the alarm. Activation of more than one of the navigation
light alarms as a result of a single failure is to be prevented.
4.5.10 Specified
requirements including the use of battery power navigation lights
are to be complied with and may be accepted as an alternative to the
above.
4.6 Escape route or low location lighting (LLL)
4.6.1 The
escape route or low location lighting (LLL) required by the Naval
Administration specified standard, where satisfied by electric illumination,
is to comply with the requirements of this sub-Section.
4.6.3 The
power supply arrangements to the LLL are to be arranged so that a
single fault or a fire in any one fire zone or deck does not result
in loss of the lighting in any other zone or deck. This requirement
may be satisfied by the power supply circuit configuration, use of
fire-resistant cables complying with Vol 2, Pt 9, Ch 3, 8.5 Construction 8.5.3, and/or the provision of suitably located power supply
units having integral batteries adequately rated to supply the connected
LLL for a minimum period of 60 minutes.
4.6.4 The
performance and installation of lights and lighting assemblies are
to comply with ISO standard 15370: Ships and marine technology
– Low location lighting on passenger ships.
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