AS NZS 2293 3 1995 emergency evacuation lighting for buildin

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AS/NZS 2293.3:1995 Emergency evacuation lighting for buildings - Emergency

luminaires and exit signs

Licensed to LUU MINH LUAN on 25 Feb 2002

AS/NZS 2293.3:1995

Australian/New Zealand Standard

Emergency evacuation lighting for buildings

Part 3: Emergency luminaires and exit signs

This Joint Australian/New Zealand Standard was prepared by Joint TechnicalCommittee LG/7, Emergency Lighting in Buildings It was approved on behalf ofthe Council of Standards Australia on 31 May 1995 and on behalf of the Council ofStandards New Zealand on 29 May 1995 It was published on 5 September 1995.

The following interests are represented on Committee LG/7:

Administrative Services Department, QueenslandAssociation of Consulting Engineers AustraliaAustralian Building Codes Board

Australian Construction Services — Department of Administrative ServicesAustralian Electrical and Electronic Manufacturers Association

Australian Institute of Building SurveyorsBuilding Industry Authority, New ZealandBuilding Management Authority of Western AustraliaBuilding Owners and Managers Association of AustraliaDepartment of Housing and Urban Development, South AustraliaDepartment of Planning and Development, Victoria

Electricity Supply Association of AustraliaIlluminating Engineering Society of Australia and New ZealandNational Electrical Contractors Association of Australia

New South Wales Fire BrigadesNew South Wales Public WorksNew Zealand Electrical Regulatory AuthoritiesNew Zealand Manufacturers FederationWorkCover Authority of New South Wales

Review of Standards To keep abreast of progress in industry, Joint Australian/

New Zealand Standards are subject to periodic review and are kept up to date by theissue of amendments or new editions as necessary It is important therefore thatStandards users ensure that they are in possession of the latest edition, and anyamendments thereto

Full details of all Joint Standards and related publications will be found in the StandardsAustralia and Standards New Zealand Catalogue of Publications; this information issupplemented each month by the magazines ‘The Australian Standard’ and ‘StandardsNew Zealand’, which subscribing members receive, and which give details of newpublications, new editions and amendments, and of withdrawn Standards

Suggestions for improvements to Joint Standards, addressed to the head office of eitherStandards Australia or Standards New Zealand, are welcomed Notification of anyinaccuracy or ambiguity found in a Joint Australian/New Zealand Standard should bemade without delay in order that the matter may be investigated and appropriate actiontaken

This Standard was issued in draft form for comment as DR 92202.

AS/NZS 2293.3:1995

Australian/New Zealand Standard

Emergency evacuation lighting for buildings

Part 3: Emergency luminaires and exit signs

PUBLISHED JOINTLY BY:

STANDARDS AUSTRALIA

1 The Crescent,Homebush NSW 2140 AustraliaSTANDARDS NEW ZEALANDLevel 10, Radio New Zealand House,

155 The Terrace,Wellington 6001 New Zealand

ISBN 0 7262 9883 2

Arising from a review of the 1987 edition of AS 2293.1, opportunity has been taken tocollect together the requirements for emergency luminaires and exit signs to form aseparate part (Part 3) of the AS/NZS 2293 series, leaving AS/NZS 2293.1‡ to coverrequirements for the overall system design, installation and operation.

The requirements in this Standard are essentially the same as those which existed in

AS 2293.1—1987* Changes of significance that have been made include the following:(a) Revision of the form of specifying the colours of exit signs (see Clause 3.6).(b) Revision of the requirements for the provision of a test switch, for self-contained

emergency luminaires and exit signs (see Clause 4.3.2)

(c) Addition of a requirement for battery circuits to be protected from excessive

discharge currents in the event of fault conditions (see Clause 4.4.4)

(d) Alteration of the requirements for battery chargers, including a new test to assess

performance under short circuit condititions (see Clause 4.5 and Paragraph D4,Appendix D)

(e) The inclusion of requirements for self-contained emergency luminaires and exit

signs with automatic discharge testing facilities (see Clause 4.8 and Paragraph D3

of Appendix D)

(f) Modification of the photometric testing conditions and the associated requirements

for establishing luminaire classifications (see Paragraphs C2.1 and C3 ofAppendix C)

Different requirements apply in Australia and in New Zealand with respect to the formand dimensions of exit signs (see Clause 3.4) The differences arise from differingregulatory practices in the respective countries It is anticipated that these differences will

be reconciled in the near future by adoption of exit signs of the pictogram type (i.e.symbolic outline of a person moving towards an open door), when requirements forinternally illuminated forms of these signs are agreed internationally

With reference to requirements for radio interference suppression (see Clause 1.5),compliance with AS/NZS 4051§ is already mandatory in New Zealand under regulationsissued by the Ministry of Commerce In Australia, the Spectrum Management Agency hasdeclared that compliance with AS/NZS 4051 will be required under Commonwealthlegislation from 1 January 1996

* AS 2293.1 — 1987 Emergency evacuation lighting in buildings

Part 1: Design and installation

† NZS 6742:1971 Code of practice for emergency lighting in buildings

‡ AS/NZS 2293.1:1995 Emergency evacuation lighting for buildings

Part 1: System design, installation and operation

§ AS/NZS 4051:1992 Limits and methods of measurement of radio interference characteristics of

fluorescent lamps and luminaires.

The terms ‘normative’ and ‘informative’ have been used in this Standard to define theapplication of the appendix to which they apply A ‘normative’ appendix is an integralpart of a Standard, whereas an ‘informative’ appendix is only for information andguidance.

Originated in Australia as part of AS 2293.1 — 1979.

Previous edition 1987.

Originated in New Zealand as part of NZS 6742:1971.

AS 2293.1 — 1987 and NZS 6742:1971 jointly revised

in part and redesignated AS/NZS 2293.3:1995.

Incorporating:

Amdt 1—1998

© Copyright STANDARDS AUSTRALIA / STANDARDS NEW ZEALAND Users of Standards are reminded that copyright subsists in all Standards Australia and Standards New Zealand publications and software Except where the Copyright Act allows and except where provided for below no publications or software produced by Standards Australia or Standards New Zealand may be reproduced, stored in a retrieval system in any form or transmitted by any means without prior permission in writing from Standards Australia or Standards New Zealand Permission may be conditional on an appropriate royalty payment Australian requests for permission and information on commercial software royalties should be directed to the head office of Standards Australia New Zealand requests should be directed to Standards New Zealand.

Up to 10 percent of the technical content pages of a Standard may be copied for use exclusively in-house by purchasers of the Standard without payment of a royalty or advice to Standards Australia or Standards New Zealand.

Inclusion of copyright material in computer software programs is also permitted without royalty payment provided such programs are used exclusively in-house by the creators of the programs.

Care should be taken to ensure that material used is from the current edition of the Standard and that it is updated whenever the Standard

is amended or revised The number and date of the Standard should therefore be clearly identified.

The use of material in print form or in computer software programs to be used commercially, with or without payment, or in commercial contracts is subject to the payment of a royalty This policy may be varied by Standards Australia or Standards New Zealand at any time.

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SECTION 1 SCOPE AND GENERAL

1.1 SCOPE 5

1.2 APPLICATION 5

1.3 REFERENCED DOCUMENTS 5

1.4 DEFINITIONS 6

1.5 RADIO INTERFERENCE SUPPRESSION 6

SECTION 2 GENERAL REQUIREMENTS FOR EMERGENCY LUMINAIRES 2.1 COMPLIANCE WITH AS 3137 7

2.2 LUMINAIRE CLASSIFICATION 7

2.3 ILLUMINATION AT SWITCH ON 7

2.4 IDENTIFICATION SYMBOL 7

2.5 MARKING 8

SECTION 3 GENERAL REQUIREMENTS FOR EXIT SIGNS 3.1 GENERAL 9

3.2 COMPLIANCE WITH AS 3137 9

3.3 GENERAL PRESENTATION 9

3.4 FORM AND DIMENSIONS 9

3.5 ILLUMINATION 9

3.6 COLOUR 11

3.7 MARKING 11

SECTION 4 PARTICULAR REQUIREMENTS FOR SELF-CONTAINED EMERGENCY LUMINAIRES AND EXIT SIGNS 4.1 GENERAL 13

4.2 SUITABILITY FOR OPERATING TEMPERATURES 13

4.3 ARRANGEMENT AND CONTROL 13

4.4 BATTERIES 14

4.5 BATTERY CHARGERS 15

4.6 CONTROL EQUIPMENT 15

4.7 ELECTRICAL REQUIREMENTS 15

4.8 SELF-CONTAINED AUTOMATIC DISCHARGE TESTING FACILITIES 16

4.9 MARKING 17

APPENDICES A ESSENTIAL DATA AND PREFERRED FORMAT FOR TEST REPORTS FOR EMERGENCY LUMINAIRES AND EXIT SIGNS 18

B SAMPLE DECLARATION OF COMPLIANCE FOR EMERGENCY LUMINAIRES AND EXIT SIGNS 24

C CLASSIFICATION OF EMERGENCY LUMINAIRES 26

D TYPE TESTING OF SELF-CONTAINED EMERGENCY LUMINAIRES AND EXIT SIGNS 31

STANDARDS AUSTRALIA / STANDARDS NEW ZEALAND

Australian / New Zealand Standard Emergency evacuation lighting for buildings

Part 3: Emergency luminaires and exit signs

performance and testing of emergency luminaires and exit signs It applies both toemergency luminaires and exit signs which are centrally supplied, and to emergencyluminaires and exit signs of the self-contained type

Different requirements are specified for application in Australia and New Zealand withrespect to exit signs (see Section 3)

NOTES:

1 Requirements for the installation and operation of emergency luminaires and exit signs arespecified in AS/NZS 2293.1 Requirements for the periodic inspection and maintenance ofemergency luminaires and exit signs are set out in AS/NZS 2293.2

2 Appendix A lists the essential data and preferred format of test reports for emergencyluminaires and exit signs Such information may be required (e.g by purchasers orinspecting authorities) to substantiate compliance with the requirements of this Standard

3 A sample declaration of the compliance of emergency luminaires and exit signs with thisStandard is given in Appendix B

and exit signs as follows:

(a) Centrally-supplied emergency luminaires—Section 2

(b) Centrally-supplied exit signs—Section 3

(c) Self-contained emergency luminaires—Sections 2 and 4

(d) Self-contained exit signs—Sections 3 and 4

Where an exit sign is also designed to serve as an emergency luminaire, the applicablecombination of the above requirements shall apply

Standard:

AS

1102 Graphical symbols for electrotechnology

1102.8 Part 8: Symbols for location diagrams

1319 Safety signs for the occupational environment

1680 Interior lighting

1680.3 Part 3: Measurement, calculation and presentation of photometric data

2633 Guide to the specification of colours

2752 Preferred numbers and their use

3100 Approval and test specification — General requirements for electrical equipment

3137 Approval and test specification — Luminaires (lighting fittings)

2293 Emergency evacuation lighting for buildings

2293.1 Part 1: System design, installation and operation

2293.2 Part 2: Inspection and maintenance

4051 Limits and methods of measurement of radio disturbance characteristics of

electrical lighting and similar equipmentIEC

285 Alkaline secondary cells and batteries — Sealed nickel-cadmium cylindrical

rechargeable single cells

896 Stationary lead-acid batteries — General requirements and methods of test

1056 Portable lead-acid cells and batteries (valve-regulated types)

1056-1 Part 1: General requirements, functional characteristics — Methods of test

signs shall be provided with radio interference suppression as necessary to ensurecompliance with AS/NZS 4051

* International Commission on Illumination, Vienna.

† For application in New Zealand, this Clause forms part of the Standard as at the date of publication For application in Australia, this Clause forms part of the Standard on 1 January 1996.

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S E C T I O N 2 G E N E R A L R E Q U I R E M E N T S F O R

requirements of AS 3137 unless otherwise specified in this Standard

NOTE: For self-contained emergency luminaires, see also the requirements of Clause 4.7

accordance with Appendix C and shall be appropriately marked

NOTE: The regulatory authority may require evidence to be supplied in support of theclassification marked on the luminaire, e.g a test report from an appropriately accreditedlaboratory

(a) 10% of the reference value within 1 s of loss of the normal supply; and

(b) 80% of the reference value within 15 s of loss of the normal supply

The reference value shall be taken as the luminous intensity assigned in terms of theclassification procedure of Paragraph C3.2 of Appendix C

The requirements of Items (a) and (b) shall apply both when the emergency luminaires areinitially switched on (i.e cold start) and when the emergency luminaires are switched onimmediately after operation for a period of 15 min (i.e hot start)

NOTE: The provision of a light output of at least 10% of the reference value within 1 s ofenergization is specified to minimize the possibility of panic occurring among the occupants ofthe building

assessing compliance with the requirements of Clause 2.3.1, the following conditions shallapply:

(a) Before the emergency luminaires are operated they shall be conditioned byconnection to the normal supply in an ambient atmosphere at 25 ±2°C for a period

For the assessment of light output required following a 15 min period of operation, thebattery shall be in the fully charged state at the commencement of that period ofoperation Loss of supply shall be simulated immediately afterwards for assessment ofcompliance with the light output criteria

shall be displayed on each emergency luminaire in a position where it will be visiblewhen installed It shall not be fixed to the diffuser or other optical control media

The symbol shall be at least 10 mm in diameter, black on a white background, as shown

in Figure 2.1

Notwithstanding the above, the symbol need not be displayed on the luminaire if this isimpractical because of the nature of the luminaire or its construction, e.g certain forms ofrecessed luminaire for use in suspended ceilings where no element of the luminaire body

is displayed on the underside of the ceiling surface

NOTE: The symbol is that recommended for emergency luminaires in AS 1102.8.

FIGURE 2.1 IDENTIFICATION SYMBOL FOR EMERGENCY LUMINAIRES

luminaire shall be legibly and durably marked with the following information, asapplicable:

(a) Luminaire classification(s) determined in accordance with Appendix C

(b) Marking to identify the orientation of the C0 plane through the luminaire (seeAppendix C) where the luminaire has a different classification in the C0 and C90planes

(c) The identification symbol specified in Clause 2.4

(d) Information necessary to ensure correct lamp replacement

(e) Warning notice regarding isolation of the electrical supply or supplies, if necessary,

to ensure the safety of persons working on the emergency luminaire or the integrity

of operation of the emergency luminaire

The marking required by Item (b) shall be clearly visible during installation andsubsequent inspection of the completed lighting system The C0 plane may be designated

by the location of the identification symbol of Figure 2.1 at the appropriate position onthe surroundings of the luminaire body

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S E C T I O N 3 G E N E R A L R E Q U I R E M E N T S F O R

internally-illuminated and externally-internally-illuminated Requirements relating to the use of these exit signsare set out in Section 5 of AS/NZS 2293.1

AS 3137 unless otherwise specified in this Standard

NOTE: For self-contained exit signs, see also the requirements of Clause 4.7

directional arrows, where required Where used, directional arrows shall be positioned insuch a way that—

(a) the projection of the arrow will not intersect any part of the legend; and

(b) a clearance of at least 25 mm is provided between the arrow and the legend

NOTE: The adoption of exit signs of the pictogram form, without the legend ‘EXIT’, is underconsideration (see Preface)

Approved Document F8 of the New Zealand Building Code

3.4.1.1 Internally-illuminated exit signs Internally-illuminated exit signs shall comprise

a contrasting transilluminated legend and background of the form and dimensions given inFigure 3.1

NOTE: Exit signs of the dimensions specified in Figure 3.1 are suitable for viewing distances of

up to 24 m Proportionately larger signs may be required where longer viewing distances apply(see Section 5 of AS/NZS 2293.1)

3.4.1.2 Externally-illuminated exit signs For externally-illuminated exit signs, the formand dimensions of the lettering shall comply with either Figure 3.1 or AS 1319 However,the letter height and background dimensions shall be not less than those specified inFigure 3.1

Approved Document F8 of the New Zealand Building Code

illuminated in accordance with Clause 3.5.2 or Clause 3.5.3, as appropriate The sign shallpresent a uniform appearance when viewed from within the range of directions fromwhich it is required to be seen

Exit signs shall comply with the requirements of Clause 2.3 but the reference value shall

be taken as the luminance of the sign when stable photometric conditions have beenattained

3.5.2 Internally-illuminated exit signs Internally-illuminated exit signs shall be of atype which complies with the following requirements:

(a) For exit signs with a white legend and green background —

(i) the luminance of the background in the area within 25 mm of the legend

shall be not less than 8 cd/m2;

(ii) the ratio of the luminance of the legend to that of the adjacent background

shall be not less than 4:1; and(iii) the variation in luminance within the legend and within the background shall

be not more than 5:1

(b) For exit signs with a green legend and an opaque background —

(i) the luminance of the legend shall lie within the range 2 cd/m2 to 25 cd/m2;

and(ii) the variation in luminance within the legend shall be not more than 5:1.The above requirements shall apply when the exit sign is operated under the mostunfavourable conditions, i.e immediately after being tested for compliance with therequirements for illumination at switch on in Clause 2.3 or at the voltage which appliesafter operation for the initial duration specified in Section 2 of AS/NZS 2293.1:

Luminances shall be measured within 5° from the normal to the plane containing thelegend, with a meter which provides a circular measurement field having a diameter ofbetween 75% and 85% of the letter stroke thickness of the legend

3.5.3 Externally-illuminated exit signs

NOTE: Requirements for externally-illuminated exit signs are specified in Section 5 ofAS/NZS 2293.1, not in this Standard, because the illumination of these signs is a function ofhow they are installed, being dependent on the light output distribution of the luminaires usedand arrangement of the luminaires relative to the signs

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3.6 COLOUR

incorporated, shall be white and the background shall be green

The green colour shall lie within the boundaries of that portion of a CIE 1931chromaticity diagram* bounded by the spectrum locus and straight lines joining thepoints specified in Table 3.1, based on the sign being illuminated by CIE standardilluminant D65*

NOTES:

1 Attention is drawn to AS 1319 which specifies the colours of a variety of surface-type signsfor use in the occupational environment The green colour specified in AS 1319 liessubstantially, though not completely, within the boundaries defined in Table 3.1

2 The use of white lettering on a green background is in accordance with ISO 3864 for allsigns which indicate a safe condition This colour combination has also been adopted in

AS 1319 However, it is not practicable to restrict the luminance of internally illuminatedsigns having the above colour combination to the degree which might be necessary toprevent distraction to occupants in interiors which are normally dimmed Provision hastherefore been made in Clause 3.6.1.2 for the use of signs having a green legend on anopaque background

requirements of Clause 3.6.1.1, where the exit sign is normally viewed under dimmedlighting conditions the legend of the exit sign and directional arrows (if any) may begreen and the background opaque

NOTE: Theatres, cinemas, auditoriums and lecture rooms are examples of where the use of thisform of exit sign is appropriate

COLOUR BOUNDARIES FOR THE GREEN

OF EXIT SIGNS (IN AUSTRALIA)†

Reference point†

Chromaticity co-ordinates

Q R S T

0.310 0.310 0.207 0.012

0.684 0.562 0.397 0.494

† The boundaries defined in Table 3.1 are illustrated in Figure 3.2 on a CIE 1931 chromaticity diagram The boundaries are those recommended for a green signal colour in CIE Publication No 107.

Document F8 of the New Zealand Building Code

shall be legibly and durably marked with the following information, as applicable:

(a) Information necessary to ensure correct lamp replacement

(b) Warning notice regarding isolation of the electrical supply or supplies, if necessary,

to ensure the safety of persons working on the exit sign or the integrity of operation

of the exit sign

* See AS 2633 for further information.

NOTE: The boundaries specified for the green of exit signs are those recommended for a green signal colour in CIE Publication No 107.

FIGURE 3.2 COLOUR BOUNDARIES FOR THE GREEN

OF EXIT SIGNS (IN AUSTRALIA)

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S E C T I O N 4 P A R T I C U L A R R E Q U I R E M E N T S

to complying with the general requirements of Sections 2 or 3, as applicable, comply withthe additional requirements of this Section

Self-contained emergency luminaires may be either specifically designed for theapplication or a composite of an emergency power supply unit and a normal lightingluminaire provided that the complete assembly satisfies the relevant requirements of thisStandard

emergency luminaires and exit signs shall be of a type that will operate satisfactorilyunder the conditions specified in Appendix D Where temperatures outside the rangespecified in Appendix D are experienced (e.g in cool rooms), the emergency luminaire orexit sign shall be of a type which operates satisfactorily in accordance with Appendix Dunder the specific temperature conditions that apply

the battery from the load before the cell voltage falls below the minimum valuerecommended by the cell manufacturer For this requirement, the minimum voltagerecommended by the cell manufacturer shall be—

(a) relevant to the number of cells used in the battery at the discharge rate applicablefor the emergency luminaire or exit sign; and

(b) selected to avoid the possibility of individual cells in the battery pack going intoreverse polarity within 10 charge/discharge cycles

The means of disconnection shall—

(i) automatically reset upon restoration of the normal supply; and

(ii) be arranged so that, immediately following disconnection, the drain imposed on thebattery is not greater than that recommended by the cell manufacturer for theoperating conditions, so that the battery will not be discharged to the extent that it

is incapable of recovery

emergency luminaire or exit sign to be checked by simulating a supply circuit failure Theswitch shall be—

(a) accessible from the exterior of the emergency luminaire or exit sign and in aconvenient position for operation; and

(b) of a type which cannot be maintained in the test position without the attendance ofthe person conducting the test

Notwithstanding the above requirements, the following exemptions shall apply:

(i) An internal test switch may be provided for emergency luminaires or exit signs of atype for which it is impractical to incorporate an external test switch, e.g.vandal-resistant luminaires or recessed troffer luminaires which have separate bodyelements The internal test switch shall be located in a position which is normallyaccessible during lamp replacement

(ii) No test switch need be provided for emergency luminaires or exit signs which aredesigned for use in hazardous locations, where the possibility of sparking resultingfrom operation of the switch would compromise safety features of the luminairedesign

4.3.3 Battery isolation facility Any facility which is provided for the purpose ofpreventing operation of the emergency luminaire or exit sign from the emergency powersource when disconnected from the normal supply shall —

(a) only be capable of operation by the use of a key or special tool; and

(b) be clearly marked as to its function and operating position

NOTE: The battery isolation facility will be of advantage where the normal supply to thebuilding (or the supply to the normal lighting within the building) is disconnected for extendedperiods, e.g during construction or when the building is unoccupied

designed for emergency or standby use The batteries shall be fitted with self-resealinggas vents

Batteries which utilize sealed nickel-cadmium cells shall comply with the requirements ofIEC 285 for cells intended for permanent charge at elevated temperatures Valve regulatedlead-acid batteries shall comply with the relevant requirements of IEC 1056-1*

NOTE: The ambient temperature in which the cells operate will largely determine the servicelife obtained from the battery The temperature conditions experienced will be influenced by thefollowing:

(a) The design of the emergency luminaire or exit sign, e.g location of the battery relative tointernal sources of heat

(b) The particular type of emergency luminaire or exit sign, i.e whether maintained or maintained Batteries located within maintained emergency luminaires or exit signs willexperience more onerous thermal conditions because of the heat generated by operation ofthe normal lighting lamp(s)

non-(c) The particular environment in which the emergency luminaire or exit sign is installed, e.g.coolroom or industrial area with significant process heat generation

In general, the life of sealed lead-acid batteries will be halved for every 10 °C temperature rise

in excess of 25°C

Batteries which are designed for operation only in specified positions, e.g vertical, may

be used provided that any restriction which this may place on the mounting of theluminaire is clearly marked

Where batteries are connected in series or parallel, they shall be of the same type andampere hour capacity for a given rate of discharge

4.4.2 Battery capacity The capacity of the battery shall be such that the self-containedemergency luminaires or exit signs comply with Appendix D

Each battery shall be legibly and durably marked with the ampere-hour capacity assigned

by the battery manufacturer at a specified rate of discharge

by a reliable means such as soldering, welding, bolting or the use of quick-connect taband receptacle connectors Such connections shall either be inherently corrosion-resistant

or shall be treated to prevent corrosion

* A Standard is in preparation for the IEC 896 series covering general requirements and tests for stationary lead-acid batteries of the valve regulated type When published, consideration will be given to amending this Clause to call for compliance with the IEC Standard.

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4.4.4 Battery circuit protection Batteries shall be protected from excessive dischargecurrents that may occur during fault conditions, resulting in overheating of internal wiring

or electronic circuits, by incorporation of a safety device between the battery and itsassociated electronic circuits

4.4.5 Provision for battery replacement Batteries shall be located and secured withinemergency luminaires and exit signs in a manner which will enable their replacement to

be readily effected without dismantling or replacing other components

Connections between batteries and other equipment in the emergency luminaire or exitsign shall be made by easily replaceable means, such as quick-connect tab and receptacleconnectors, which provide reliable electrical connections Such connections shall either beinherently corrosion-resistant or shall be treated to prevent corrosion

when connected to a battery at zero potential, it will either —

(a) continue to function; or

(b) fail in a safe manner

Compliance with the above shall be assessed by the test of Paragraph D4, Appendix D

The rating of the battery charger shall be such that—

(i) after the battery has been discharged from the fully-charged state by operating theemergency luminaire or exit sign for the initial duration of operation specified inSection 2 of AS/NZS 2293.1; and

(ii) after recharging for a period of not more than 16 h;

the battery shall have recovered to the extent that it is capable of sustaining an additionaldischarge as specified in Item (i) The output voltage at the end of each discharge periodshall be not less than that recommended by the battery manufacturer

NOTE: For certain premises (e.g theatres) the inspecting authority may require a shorterrecovery period than 16 h or otherwise impose restrictions on re-occupation of the premisesafter operation of the emergency lighting

The battery charger shall recharge and maintain the battery automatically while the normalsupply to the emergency luminaire or exit sign is available The system shall be arranged

so that the battery will not receive a charge in excess of the limits recommended by thebattery manufacturer under any condition of operation

Visual indication of battery charger operation shall be provided The indicator shall be—(A) red in colour;

(B) connected to the output side of the battery charger;

(C) arranged such that failure of the indicator device will not render the emergencyluminaire or exit sign inoperative; and

(D) located in a position which will be visible when mounted in any designed attitude

discharge lamps, the control equipment shall be of a type which will ensure satisfactorystarting and operation of the lamps

(see Clauses 2.1 and 3.2), the test of operating temperatures may be omitted because thetests in Appendix D of this Standard specify more onerous thermal conditions

The emergency power supply unit shall be protected against damage from a.c supplysystem transients All components shall be securely fixed in position

Printed circuit tracks and conductors shall be protected against corrosion, dust andhumidity Relays, if used, shall be protected against dust.

Any connectors used shall either be inherently corrosion-resistant or shall be treated toprevent corrosion

are provided with self-contained, automatic facilities for discharge testing, i.e fully alone systems

requirements for automatic testing facilities in Section 4 of AS/NZS 2293.1, and with thefollowing:

(a) The test facility shall not interfere with the capability of the emergency luminaire orexit sign to operate correctly in response to loss of the normal supply

(b) The test facility shall automatically subject the emergency luminaire or exit sign to

a discharge test at intervals of not more than specified in AS/NZS 2293.2 Thesystem used to time the interval between successive discharge tests shall not beaffected during periods when the normal supply is interrupted

The test facility shall provide for the discharge test to continue for at least therequired duration and, for the period of the test, the battery shall receive no charge.(c) Appropriate sensing means shall be provided to confirm that the emergency lamp(s)remained illuminated for the required duration

(d) If loss of the normal supply occurs while the test is in progress, the emergencyluminaire or exit sign shall remain connected in the emergency mode until the testhas been completed or, if the normal supply has not been restored, until theemergency luminaire or exit sign is disconnected by the automatic battery cut-offdevice

NOTE: The operation of the emergency luminaire or exit sign can continue to be monitoredafter loss of supply, the indication of the outcome of the test being provided when the normalsupply is restored

emergency luminaire or exit sign to identify the following operational states:

(a) Normal state — an indication that the emergency luminaire or exit sign is in the

normal mode, awaiting the next discharge test

(b) Recently tested and complies — a temporary indication that the emergency luminaire

or exit sign was recently tested and remained illuminated for the required duration.The indication shall be maintained for at least 5 days following completion of thetest after which the indication shall revert to that described in Item (i) below

NOTE: The purpose of this temporary indication is to facilitate logging of the test results bymaintenance personnel

(c) Tested and failed — an indication that the emergency lamp(s) failed to remain

illuminated for the required duration when subjected to a discharge test Thisindication shall be maintained until the fault has been rectified and the emergencyluminaire or exit sign successfully passes a subsequent discharge test

Where a single visual indicator is used to provide all of the indications required by Items(a) to (c), it shall be yellow in colour and the following illuminated states shall have themeanings given:

(i) Continuously illuminated — to indicate the normal state See Item (a).

(ii) Slow flash — to indicate recently tested and complies See Item (b).

The cycle shall comprise 4 s ‘on’ and 1 s ‘off’

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