FINAL DRAFT UGANDA STANDARD  
  FDUS ISO 11602-1
First Edition
2008-mm-dd
 
Reference numbe r
FDUS ISO 11602-1:2000
 © UNBS 2008
  
Fire protection — Portable and wheeled fire extinguishers — 
Part 1: Selection and installation 
 FDUS ISO 11602-1:2000 
 
© UNBS  2008 – All rights reserved Compliance with this standard does not, of itself confer immunity from legal obligations 
A Uganda Standard does not purport to include all necessary provisions of a contract. Users are 
responsible for its correct application  
© UNBS 2008 
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
form or by any means, electronic or mechanical, in cluding photocopying and microfilm, without prior written 
permission from UNBS. 
Requests for permission to reproduce this document should be addressed to 
The Executive Director 
Uganda National Bureau of Standards 
P.O. Box 6329 
Kampala  
Uganda 
Tel: 256 41 505 995 
Fax: 256 41 286 123 
E-mail: unbs@infocom.co.ug
Web: www.unbs.go.ug  
 FDUS ISO 11602-1:2000  
© UNBS  2008 - All rights reserved National foreword 
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry  of Tourism, Trade and 
Industry established under Cap 327, of the Laws of U ganda. UNBS is mandated to co-ordinate the elaboration 
of standards and is  
(a) a member of International Organisation for Standardisation (ISO) and  
(b) a contact point for the WHO/FAO Codex A limentarius Commission on Food Standards, and  
(c) the National Enquiry Point on TBT/SPS Agr eements of the World Trade Organisation (WTO). 
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a gi ven field or area and consists of representatives of 
consumers, traders, academician s, manufacturers, governme nt and other stakeholders. 
Draft Uganda Standards adopted by the Technical Committ ee are widely circulated to stakeholders and the 
general public for comments. The committee reviews the comments before recommending the draft standards 
for approval and declaration as Uganda Standards by the National Standards Council. 
This Final Draft Uganda Standard, FDUS ISO 11602-1:2000, Fire protection — Portable and 
wheeled fire extinguishers — Part 1: Selection and installation, is identical with and has been 
reproduced from an International Standard, ISO 11602-1:2000, Fire protection — Portable and wheeled fire 
extinguishers — Part 1: Selection and installation, and is being proposed for adoption as a Uganda standard. 
This standard was developed by the Mechanical engi neering and metallurgy Standards Technical Committee 
(UNBS/TC 4). 
Wherever the words, "International Standard" a ppear, they should be replaced by "Uganda Standard." Reference number
ISO11602-1:2000(E)
©ISO2000INTERNATIONAL
STANDARDISO
11602-1
Firstedition
2000-07-01
Fire protection — Portable andwheeledfire
extinguishers —
Part 1:
Selectionandinstallation
Protectioncontre l'incendie— Extincteurs portatifs et extincteurs
sur roues —
Partie1: Choix et installationISO 11602-1:2000(E)
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ii © ISO2000 –All rights reservedISO 11602-1:2000(E)
© ISO2000 –All rights reserved iiiForeword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
member bodies). The work of preparing International Standards is normally carried out through ISO technical
committees. Each member body interested in a subject for which a technical committee has been established hasthe right to be represented on that committee. International organizations, governmental and non-governmental, inliaison with ISO, also take part in the work. ISO collaborates closely with the International ElectrotechnicalCommission(IEC) onall matters of electrotechnicalstandardization.
InternationalStandards are drafted in accordance with the rules givenintheISO/IEC Directives, Part3.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publicationas anInternationalStandardrequires approval byat least 75% of themember bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this part of ISO11602 may be the subject of
patent rights. ISO shall not beheldresponsiblefor identifyinganyor allsuch patent rights.
International Standard ISO11602-1 was prepared by Technical Committee ISO/TC21, Equipment for fire
protectionand firefighting , SubcommitteeSC2, Manually transportablefireextinguishers .
ISO 11602 consists of the following parts, under the general title Fire protection —Portable and wheeled fire
extinguishers :
/GbePart 1: Selection and installation
/GbePart 2: Inspection andmaintenanceISO 11602-1:2000(E)
iv © ISO2000 –All rights reservedIntroduction
ISO 11602 is intended to provide guidance to those involved in the application of portable and wheeled fire
extinguishers as a means, or partial means, of providing fire protection to various hazards both within and outside
buildings. It should be recognized that the rules and recommendations provided herein may not be applicable to allhazards where specific configurations of combustible materials, or other special locations or circumstances, dictatetheneed for engineered protection.
Requirements are specified in this part of ISO11602 for the selection and installation of portable and wheeled fire
extinguishers. Details relatingto inspectionandmaintenance arecontained in ISO11602-2.INTERNATIONAL STANDARD ISO 11602-1:2000(E)
© ISO2000 –All rights reserved 1Fire protection —Portable and wheeledfire extinguishers —
Part 1:
Selectionandinstallation
1 Scope
This part of ISO 11602 gives requirements for the selection and installation of portable and wheeled fire
extinguishers.Itshould beused inconjunction with ISO11602-2.
Fire extinguishers are intended as a first line of defence against fires of limited size. They are needed even if the
propertyis equipped withautomatic sprinklers, standpipeandhose, or other fixed protection equipment.
This part of ISO 11602 is not applicable to permanently installed systems for fire extinguishment, even though
portions of such systems may be portable (such as hose and nozzles attached to a fixed supply of extinguishing
media).
The requirements in this part of ISO 11602 are minimum r equirements. The use of larger, higher rated or greater
numbers of extinguishers will, in general, improve protection.
Extinguishers for use on board aircraft, watercraft and vehicles are considered to be outside the scope of this part
of ISO 11602.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions ofthis part of ISO 11602. For dated references, subsequent amendments to, or revisions of, any of these publicationsdo not apply. However, parties to agreements based on this part of ISO11602 are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintainregisters of currentlyvalid International Standards.
ISO 7165, Fire-fighting —Portable fire extinguishers —Performance and construction .
ISO 8421-1, Fire protection —Vocabulary —Part 1: Generalterms and phenomenaof fire .
ISO 11601, Wheeledfire extinguishers —- Performance andconstruction .
3 Terms anddefinitions
For the purposes of this part of ISO11602, the terms and definitions given in ISO8421-1, together with the
following, apply.
3.1
closed recoverysystemfor extinguishingpowder
system employed for there-use of powderISO 11602-1:2000(E)
2 © ISO2000 –All rights reservedNOTE It provides for the transfer of powder from an extinguisher to a recovery container that is closed to prevent the loss
ofmediato the atmosphere.
3.2
closed recoverysystem for halon
system that provides for the transfer of halon between extinguishers, supplycontainers, and recharge and recovery
containers sothat theescapeof halon tothe atmosphereis minimized
3.3
competent person
person with the necessary training and experience and with access to the requisite tools, equipment, parts and
information(includingthemanufacturer's servicemanual) tobecapableof carrying out the inspection, maintenanceandrechargingprocedures of this part of ISO11602
NOTE See annexAof ISO11602-2:2000.
3.4
film-forming media
aqueous film-forming foam (AFFF) and film-forming fluoroprotein foam (FFFP) types, including grades suitable for
polar solvents (water-solubleflammableliquids), andthose not suitablefor polar solvents
3.5
fireextinguisher
portable or wheeledfireextinguisher
NOTE "Fireextinguishers" are referred to as "extinguishers" inthis part ofISO11602.
3.6 Hazards
3.6.1
Class Ahazard
occupancies or fuel sources where Class A fires, involving materials such as wood, cloth, paper, rubber and many
plastics, maybe expectedto develop
3.6.2
Class B hazard
fuelsources where Class Bfires, involvingmaterials suchas oils, greases andpaints, maybeexpected todevelop
3.6.3
Class C hazard
fuelsources where Class C fires, involvingmaterials suchas natural andpropanegas, maybe anticipated
3.6.4
Class D hazard
fuel sources where Class D fires, involving materials such as magnesium, sodium and potassium, may be
anticipated
3.7
high-pressurecylinder
cylinder havinga servicepressurehigher than 2,5 MPaat 20 /Gb0C
3.8
inspection
brief examinationto ensure that an extinguisher is available and will operate
NOTE This is intended to give reasonable assurance that the extinguisher is fully charged and operable. This is done by
seeing that it is in its designated place, that it has not been actuated or tampered with, and that there is no obvious damage or
condition topreventits operation.ISO 11602-1:2000(E)
© ISO2000 –All rights reserved 33.9
low-pressurecylinder
cylinder havinga servicepressureof 2,5Mpaor lower at 20 /Gb0C
3.10
maintenance
thorough examinationof the extinguisher
NOTE This is intended to give maximum assurance that an extinguisher will operate effectively and safely. It includes a
thorough examination and anynecessaryrepairorreplacement. It willnormallyreveal ifhydrostatic testing is required.
3.11
non-rechargeable extinguisher
non-refillable extinguisher
fireextinguisher that is not capableof (nor intendedfor) undergoing complete maintenance, hydrostatic testing, and
beingrestoredto its fulloperatingcapabilitybythestandardpractices used byfireequipment servicecompanies
3.12
occupancyhazard(high)location where the total amount of Class A combustibles and Class B flammables present, in storage, productionuseand/or finished product, is over and abovethoseexpectedunder moderatehazardoccupancies
3.13
occupancyhazard(low)
location where the total amount of Class A combustible materials, including furnishings, decorations, and contents,
is of minor quantity
NOTE This classification anticipates that the majority of items contained are either non-combustible or so arranged that a
fire is not likely to spread rapidly. Small amounts of Class B flammables used for duplicating machines, art departments, etc.,
are includedprovided that theyarekeptinclosed containers and safelystored.
3.14
occupancyhazard(moderate)
location where the total amount of Class A combustibles and Class B flammables are present in greater amounts
than expectedunder low hazard occupancies
3.15
portableextinguisher
portable appliance containing an extinguishing medium which can be discharged and directed onto a fire by theaction of internalpressure
NOTE The internal pressuremaybeprovided by
/Gbea stored pressure(pressurization oftheextinguishingmediumcontainerat the timeofcharging), or
/Gbea gas cartridge (pressurization at the time of use through the release of gas from a separate cylinder into the medium
container).
3.16
rating
comparative number associated with the classification assigned to an extinguisher and indicative of its capability in
theextinguishment of astandardfire
3.17
rechargeableextinguisherrefillableextinguisherfire extinguisher capable of undergoing complete maintenance, including internal inspection of the pressure vessel,replacement of allsubstandardparts andseals, and hydrostatic testingISO 11602-1:2000(E)
4 © ISO2000 –All rights reservedNOTE This type of extinguisher is capable of being recharged with media and propellant, and restored to its full operating
capability by the standard practices used by fire equipment service companies. Rechargeable (refillable) extinguishers are
marked "RechargeImmediatelyAfterAnyUse" orwitha similarequivalentmarking.
3.18
rechargingreplacement of the extinguishingmedium
NOTE This also includes the propellantforcertain types ofextinguishers.
3.19self-expelling-mediumextinguisherextinguisher in whichthemedium has sufficient vapour pressure at normaloperating temperatures to expelitself
3.20
serviceservicing
process which includes one or moreof thefollowing:
/Gbemaintenance,
/Gberecharging, and
/Gbehydrostatic testing
3.21
servicepressure
normal operating pressure at 20 /Gb0C as indicated on the pressure gauge or indicator and nameplate of a stored
pressure extinguisher, or the pressure developed in a cartridge-operated extinguisher upon release of the gas from
thecartridge intothemedium container at atemperature of 20 /Gb0C
3.22
test pressure
pressureat whichthe extinguisher or its components were testedat timeof manufacture
NOTE The pressureat which theshell was tested is shown on thenameplateorthe extinguisherbody.
3.23
travel distance
distance apersonmust travelfrom anypoint to the closest appropriateextinguisher
3.24
water-typeextinguisher
fireextinguisher whichcontains a water-based medium,suchas water,foam (AFFFor FFFP) andantifreeze
3.25
wheeled extinguisher
fire extinguisher having a total mass of more than 20 kg, mounted on wheels, which is designed to be transported
and operated byoneperson
4 Classifications,ratingsandperformance ofextinguishers
4.1Extinguishers are classified for use on certain classes of fires and rated for relative extinguishing
effectiveness by testing laboratories. This is based on the classification of fires and the fire-extinguishing potentials
as determined byfire tests.ISO 11602-1:2000(E)
© ISO2000 –All rights reserved 54.2Theclassifications are as follows:
/GbeClass A: fires involving solid materials, usually of an organic nature, in which combustion normally takes
place with the formation of glowing embers;
/GbeClass B: fires involving liquids or liquefiable solids;
/GbeClass C: fires involving combustible gases;
/GbeClass D: fires involving combustible metals
4.3The classification and rating systems referenced in this part of ISO11602 are those described in ISO7165
andISO11601.
4.4Extinguishers used to comply with this part of ISO11602 shall be in accor dance with ISO7165 and
ISO 11601.
4.5The identification of the certification organization, the fire-extinguishing classification and rating and the
performancestandard that theextinguisher meets areclearlymarkedoneach extinguisher.
5 General requirements
5.1Extinguishers shall be maintained in a fully charged and operable condition, and shall be kept in their
designatedplaces at alltimes whentheyarenot beingused.
5.2Extinguishers shall be conspicuously located where they will be readily accessible and immediately available
intheevent of fire. Preferablytheyshallbelocatedalongnormalpaths of travel, including exits from areas.
5.3Cabinets housing extinguishers shallnot belocked.
EXCEPTION: Where extinguishers are subject to vandalism, locked cabinets may be used provided they include
means of emergencyaccess.
5.4Extinguishers shallnot beobstructed or obscuredfrom view.
EXCEPTION: In large rooms and in certain locations where visual obstruction cannot be completely avoided,
means shallbeprovided toindicate the locationof theextinguishers.
5.5Extinguishers shall be installed on hangers or in brackets, or mounted in cabinets, unless the extinguishers
areof the wheeledtype.
5.6Extinguishers installed under conditions where they are subject to dislodgement shall be installed in
specificallydesigned brackets.
5.7Extinguishers installed under conditions where they may be subject to physical damage shall be protected
from impact.
5.8Extinguishers having a gross mass of 18 kg or less shall be installed so that the top of the extinguisher is not
more than 1,5 m above the floor. Extinguishers having a gross mass greater than 18 kg (except wheeled types)
shall be installed so that the top of the extinguisher is not more than 1,0 m above the floor. The clearance betweenthebottom of extinguishers mounted onhangers or brackets andthefloor shallnot beless than 3cm.
5.9When mounted or placed in their intended location, the operating instructions shall face outwards or towards
themost likelydirection of access.
5.10Where extinguishers are installed in closed cabinets that are located outdoors, or are exposed to elevated
temperatures, suchcabinets shall be provided withventilationopenings.ISO 11602-1:2000(E)
6 © ISO2000 –All rights reserved5.11Extinguishers shall not be installed in areas where temperatures are outside the range marked on the
extinguisher, or wheretheymaybe exposed toelevated temperatures from heatingsources.
5.12Units of measurement in this part of ISO11602 are, in general, in accor dance with the International System
of Units (SI). Some units (e.g. cm, bar and litre), outside of but recognized by SI, may appear as they are
commonlyusedininternationalfireprotection. SeeISO1000.
6 Selection ofextinguishers
6.1 General
The selection of extinguishers for a given situation shall be determined by the character and extent of the fires
anticipated, the construction and occupancy of the individual property, the hazard to be protected against, the
ambient temperature conditions, and other factors. The number, rating, placement and limitations of use of therequiredextinguishers shallmeet therequirements of clause7.
6.2 Halon fireextinguishers
Theuseof halonfireextinguishers shallbe limited to applications where a clean medium is necessaryto extinguishfireefficientlywithout damaging the equipment or area being protected, or where the use of alternative media couldcauseahazardtopersonnelinthearea.
6.3 Selectionbyhazard
6.3.1Extinguishers shallbeselectedfor thespecific class(es) of hazards to be protectedagainst.
6.3.2Extinguishers for protection against Class A hazards shall be selected from extinguishers with the
appropriateClass Arating.
EXCEPTION: For halon-type extinguishers, see 6.2.
6.3.3Extinguishers for protection against Class B hazards shall be selected from extinguishers with the
appropriateClass Brating.
EXCEPTION: For halon-type extinguishers, see 6.2.
6.3.4Extinguishers for protectionagainst Class C hazards shallbeof the powder type.
6.3.5Extinguishers and extinguishing media for protection against Class D hazards shall be of types suitable for
useon thespecific combustible-metalhazards.
6.3.6Extinguishers for protection against hazards which involve energized electrical equipment shall be of the
carbon dioxide, powder, halon, or water-based types which have been tested and found suitable for thisapplication.
EXCEPTION: For halon-type extinguishers, see 6.2.
Carbon dioxide extinguishers equipped with metal horns are not considered safe for use on fires involving
energized electrical equipment.
While powder extinguishers may be effective in extinguishing fires in delicate electronic equipment, the residue
from their mediamayseriouslydamagethe equipment theyareintendedto protect.ISO 11602-1:2000(E)
© ISO2000 –All rights reserved 76.4 Selectionfor pressurizedflammableliquid andgasfires
6.4.1Extinguishers containing media other than powder are relatively ineffective on pressurized flammable
liquids and pressurized gas fires. The selection of extinguishers for this type of hazard shall be made on the basis
of recommendations bythemanufacturers of this specialized equipment. The system used to rate the effectivenessof extinguishers on Class B fires (flammable liquids in depth) is not applicable to these types of hazard. It has beendetermined that specialnozzle design and rates of media application are required to cope with such hazards.
WARNING It is undesirable to attempt to extinguish this type of fire unless there is reasonable assurance
thatthesource offuelcanbepromptlyshutoff.
6.4.2Extinguishers for three-dimensional Class B hazards involving Class B materials in motion, such as
pouring, running or dripping flammable liquids, shall be selected on the basis of recommendations by the
manufacturers of the extinguishers. The system used to rate extinguishers on Class B fires (flammable liquids indepth) is not directlyapplicable to this type of hazard.
NOTE The installation of fixed systems forsuchhazards should beconsidered when applicable.
6.4.3Extinguishers for use on water-soluble flammable liquid fires, such as alcohols, esters, ketones, etc., shall
not be of the AFFF or FFFP type unless the extinguishing medium has been specifically tested and found to be
suitable for such applications.
6.4.4Wheeledextinguishers shall beconsidered for hazardprotection inhighhazardareas or where
/Gbehigh media flowrates,
/Gbeincreased mediastream range, or
/Gbeincreased mediacapacity
arerequired.
7 Distribution ofextinguishers
7.1 General requirements
7.1.1The minimum number of extinguishers needed to protect a hazard shall be determined as outlined in this
clause.
Additional extinguishers may be installed to provide more suitable protection for special hazards. Consideration
shall be given to the protection of high storage items and other hazards requiring extinguishers with a suitablevertical range. Extinguishers having ratings less than specified in Tables1 and 2 may be installed, provided theyare not used to fulfil the minimum protective requirements of this clause.
7.1.2Extinguishers shall be provided for the protection of both the building structure, if combustible, and the
hazards containedtherein.
7.1.3Required building protection shall be provided byextinguishers suitable for Class Afires.
7.1.4Protection of building contents shall be provided by extinguishers suitable for such Class A, B, C or D fire
hazards as maybe present.
7.1.5Extinguishers provided for building protection may be considered also for the protection of occupancies
having a Class A fire potential.ISO 11602-1:2000(E)
8 © ISO2000 –All rights reserved7.1.6Buildings having Class B and/or Class C hazards shall have a standard complement of Class A
extinguishers for building protection, plus additional Class B and/or Class C extinguishers. Where extinguishers
havemorethan one letter classification, theymaybeconsidered tosatisfythe requirements of eachletter class.
7.1.7Occupancies shall be classified generally as low hazard, moderate hazard, or high hazard occupancies
(see 3.12 to 3.14). Limited areas with greater or lesser hazards shall be protected as required. Consideration shall
alsobegiventothenumber of occupants, their ages, andtheir abilityto evacuate in the caseof fire.
7.1.8On each floor level, the area protected and the travel distances are based on extinguishers installed in
accordance withTables 1 and 2.
7.2 Fire extinguisherratingsand placementforClass Ahazards
7.2.1Fireextinguishers for the different types of hazards shallbe provided onthe basis of Table1.
Table1
TypeofhazardMinimum
extinguisherratingMaximum traveldistance
to extinguisher
mMaximum area
perextinguisher
m2
Low 2-A 20 300
Moderate 3-Aa 20 150
High 4-Aa 15 100
aTwo 2-A rated water-type extinguishers, provided they are installed adjacent to each other, may be used to fulfil the
requirementsof one 3-Aor4-Aratedextinguisher.
7.2.2At least twoextinguishers as recommendedinTable1shallbeprovided per floor level.
EXCEPTION: For floor levels having an area of less than 100m2, oneextinguisher maybeprovided.
7.2.3The protection requirements may be fulfilled with extinguishers of higher ratings, provided the travel
distance tosuch larger extinguishers does not exceed the distanceshown inTable1.
7.3 Extinguisherrating andplacementfor Class B hazards otherthanhazardsinflammable
liquids of appreciable depth(inexcess of 0,6 cm)andforClassC hazards
7.3.1Extinguishers for the listed types of hazard shallbe provided on the basis of Table 2.
EXCEPTION: Extinguishers of lesser rating, for small specific hazards within the general hazard area, may be
used, but shall not be considered as fulfilling anypart of the requirements of Table 2.
Table2
TypeofhazardMinimumextinguisher
ratingMaximum travel
distanceto
extinguishers
mMaximum areaper
extinguisher
m2
Low 55B 15 300
Moderate 144 B 15 150
High 233 B 15 100ISO 11602-1:2000(E)
© ISO2000 –All rights reserved 9For pressurizedflammableliquid and gas fires, see 6.4.
For fires involving water-soluble flammable liquids, see 6.4.3.
7.3.2Two or more extinguishers of lower rating shall not be used to fulfilthe protection requirements of Table2.
EXCEPTION: Up to three AFFF- or FFFP-type extinguishers, provided the sum of their ratings equals or
exceeds the minimum required rating, maybeusedto fulfil the requirements of a single extinguisher of the required
rating.
7.3.3The protection requirements may be fulfilled with extinguishers of higher ratings, provided the travel
distance tosuch larger extinguishers does not exceed the distanceshown inTable2.
7.3.4At least twoextinguishers as recommendedinTable2shallbeprovided per floor level.
EXCEPTION: For floor levels having an area of less than 100m2, oneextinguisher maybeprovided.
7.4 Extinguisher sizeand placementforClass Bhazardsinflammableliquids of appreciable
depth (inexcess of 0,6 cm)
7.4.1Extinguishers shall not be installed as the sole protection for flammable liquid hazards of appreciable depth
(greater than 0,6cm) where thesurfaceareaexceeds 1m2.
7.4.2For flammable liquid hazards of appreciable depth, such as in dip or quench tanks, a Class B extinguisher
shall be provided on the basis of at least 144 numerical units of Class B extinguishing potential per square metre of
the estimated maximum fire area.
EXCEPTION 1: Where approved automatic fire protection devices or systems have been installed for a
flammable liquid hazard, additional portable Class B fire extinguishers may be waived. Where so waived, Class Bextinguishers shallbe provided as covered in 7.3.1 to protect areas in the vicinityof such protected hazards.
EXCEPTION2: AFFF- or FFFP-type extinguishers may be provided on the basis of 89B of protection per square
metreof hazard.
7.4.3Two or more extinguishers of lower ratings shall not be used in lieu of the extinguisher required for the
largest tank.
EXCEPTION: Up to three AFFF- or FFFP-type extinguishers may be used to fulfil the requirements of a single
extinguisher of the required rating, provided the sum of their ratings equals or exceeds the minimum requiredrating.
7.4.4When the size of a Class B hazard of appreciable depth is such that it cannot be protected by portable
extinguishers, the use of a wheeled extinguisher maybe considered when it can be demonstrated that it is capable
of protecting against the hazard. Where so used, Class B portable extinguishers shall also be provided, as covered
in7.3.1, to protect areas inthe vicinityof sucha hazard.
7.4.5Traveldistances to extinguishers shall not exceed 15m.
7.4.6Scattered or widely separated hazards shall be individually protected. An extinguisher in the proximity of a
hazardshall becarefullylocatedto be accessible in the presence of afire without unduedanger totheoperator.
7.5 Extinguisher sizeand placementforelectricalhazards
7.5.1Electrical hazards include hazards either directlyinvolving or surrounding electrical equipment.
7.5.2As the hazard itself is a Class A or Class B hazard, the extinguishers shall be sized and located on the
basis of the anticipated Class Aor Bhazard.ISO 11602-1:2000(E)
10 © ISO2000 –All rights reserved7.5.3Whereenergizedelectricalequipment maybe encountered, the extinguishers shallhavebeen proved to be
suitablefor use on energized electrical equipment andsomarked.
Electrical equipment should be de-energized as soon as possible to prevent re-ignition.
7.6 Extinguisher sizeand placementforClass Dhazards
7.6.1Class D extinguishers shall be providedfor hazards involvingcombustiblemetals.
7.6.2Thetraveldistances to extinguishers for Class D hazards shall not exceed 20m.
7.6.3The size and number of extinguishers shall be determined on the basis of the specific combustible metal,
its physicalparticle size, andthe areatobecovered.ISO 11602-1:2000(E)
© ISO2000 –All rights reserved 11Bibliography
[1] ISO 3941, Classificationoffires .
[2] ISO 5923, Fireprotection —Fire extinguishingmedia —Carbon dioxide .
[3] ISO 7201(all parts), Fire extinguishing media —Halogenatedhydrocarbons .
[4] ISO 7202, Fireprotection —Fire extinguishingmedia —Powder.
[5] ISO 7203(all parts), Fire extinguishing media —Foamconcentrates .
[6] ISO 8421-4, Fire protection —Vocabulary —Part 4:Fireextinctionequipment .
[7] ISO 8421-6, Fire protection —Vocabulary —Part 6: Evacuation and means of escape .
[8] ISO 1000, SI units andrecommendations for theuse of their multiples and of certain other units .
[9] ISO 11602-2:2000, Fire protection —Portable and wheeled fire extinguishers —Part2: Inspection and
maintenance .ISO 11602-1:2000(E)
ICS 13.220.10
Pricebased on11 pages
© ISO2000 –All rights reserved