IEC 60050-903-am1

Amendment 1 - International Electrotechnical Vocabulary - Part 903: Risk assessment

Amendement 1 - Vocabulaire Electrotechnique International - Partie 903: Appréciation du risque

Mednarodni elektrotehniški slovar - 903. del: Ocenjevanje tveganja - Dopolnilo A1

General Information

• Status: Not Published
• ICS: 01.040.29 - Electrical engineering (Vocabularies)
• ICS: 29.020 - Electrical engineering in general
• Technical Committee: ISO/IEC JTC 1/SC 1 - Vocabulary
• Current Stage: PPUB - Publication issued
• Start Date: 13-Aug-2014
• Ref Project: SIST IEC 60050-903:2016/A1:2017 - International Electrotechnical Vocabulary - Part 903: Risk assessment

Overview

IEC 60050-903 Amendment 1 is an important update to the International Electrotechnical Vocabulary (IEV) focusing specifically on risk assessment within electrical engineering. Published by the International Electrotechnical Commission (IEC), this amendment enhances clarity and consistency by defining key terms and concepts related to safety, risk reduction, and the operational conditions of electrical equipment. Serving as a technical reference, IEC 60050-903-am1 supports global harmonization of terminology for risk assessment practices, improving communication among standards developers, manufacturers, and safety professionals.

Key Topics

This amendment introduces crucial vocabulary entries organized into thematic sections that address:

• Safety and Risk Reduction

  • Normal operating condition: Operating parameters representing expected typical use.
  • Abnormal operating condition: Operating states not deemed normal nor caused by a single equipment fault.

• Safety Requirements for Information Technology Equipment

  • Required withstand voltage: Peak insulation voltage that equipment must endure.
  • Peak working voltage: Highest voltage during operation, including DC components and peak impulses.
  • Mains transient voltage: Highest expected voltage peaks due to external power supply transients.
  • Potential ignition source (PIS): Electrical locations where ignition risk exists due to energy discharge.

• Equipment Types and Protective Measures

  • Movable equipment: Devices designed with limited mass or wheels facilitating user movement.
  • Direct plug-in equipment: Equipment with mains plugs integral to the enclosure, supported by the socket.
  • Pluggable equipment Types A & B: Classification by connection type-non-industrial versus industrial plugs.

• Enclosure and Insulation

  • Fire enclosure: Enclosure designed to prevent fire spread from inside to outside.
  • Mechanical enclosure: Protective enclosure preventing injury from mechanical impact.
  • Solid insulation: Insulation material composed entirely of solid material, providing electrical protection.

• Additional Safety Features

  • Safety interlock: Automatic system reducing energy classification before exposure to human contact.
  • Non-detachable power supply cord: Power cord fixed to equipment, removable only with tools.
  • TNV circuit: Circuits designed to limit accessible voltage levels within safe boundaries under normal and fault conditions.

• Material Flammability Classes

  • Defines material groups based on burning behavior and self-extinguishing capabilities, critical for fire safety assessments.

Applications

IEC 60050-903-am1 serves as a foundational vocabulary standard for:

• Standards Development: Ensures unified terminology in international standards concerning electrical risk assessment and safety requirements, notably for IT equipment.
• Risk Analysis and Safety Engineering: Supports engineers in performing consistent risk assessments by clearly defining operational states and hazard terms.
• Product Design and Compliance: Assists manufacturers in aligning design parameters, insulation requirements, and material selection with internationally recognized safety definitions.
• Quality Assurance and Testing: Provides terminology needed to define test criteria such as withstand and transient voltage levels, necessary for certification and regulatory compliance.
• Safety Training and Documentation: Streamlines technical communication to facilitate understanding of risk concepts among safety officers, engineers, and maintenance personnel.

Related Standards

IEC 60050-903-am1 extensively references terminology derived from or related to other IEC standards, ensuring cross-consistency:

• IEC 62368-1: Multimedia equipment safety, source of many definitions on operating conditions, insulation, and protective measures.
• IEC 60320-1: Appliance couplers for household and similar general purposes, related to pluggable equipment types.
• IEC 60309-1: Industrial plugs, socket-outlets, and couplers for industrial-type equipment connections.
• IEC 62102: Standard defining telecommunication network voltage circuits, related to TNV circuit classification.
• IEC/TR 60083: Reference for non-industrial plug and socket-outlets.

By harmonizing terminology across these standards, IEC 60050-903-am1 facilitates precise risk assessment language widely applicable in electrical engineering and safety management disciplines.

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This amendment to the International Electrotechnical Vocabulary, with its comprehensive terminology for risk assessment, plays a vital role in enhancing electrical safety, optimizing risk management strategies, and supporting regulatory compliance across industries worldwide.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2017
Mednarodni elektrotehniški slovar - 903. del: Ocenjevanje tveganja - Dopolnilo A1
International Electrotechnical Vocabulary - Part 903: Risk assessment
Vocabulaire Electrotechnique International - Partie 903: Appréciation du risque
Ta slovenski standard je istoveten z: IEC 60050-903-am1
ICS:
01.040.29 Elektrotehnika (Slovarji) Electrical engineering
(Vocabularies)
29.020 Elektrotehnika na splošno Electrical engineering in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

IEC 60050-903 ®
Edition 1.0 2014-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
HO RIZONTAL STANDARD
NO RME HORIZONTALE
AMENDMENT 1
AMENDEMENT 1
International Electrotechnical Vocabulary –

Part 903: Risk assessment
Vocabulaire Electrotechnique International –

Partie 903: Appréciation du risque

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX E
ICS 01.040.29; 29.020 ISBN 978-2-8322-1801-3

– II – IEC 60050-903:2013/AMD1:2014
© IEC 2014
FOREWORD
This amendment specifies changes made to the International Electrotechnical Vocabulary
(www.electropedia.org) which have not been published as a separate standard.
The text of this amendment is based on the following change requests approved by IEC
technical committee 1: Terminology.
Change request Approved
C00009 2014-04-10 (entries
not approved are not
included)
Full information on the voting for the approval of the change requests constituting this
amendment can be found on the IEV maintenance portal.
_____________
AVANT-PROPOS
Le présent amendement spécifie les modifications apportées au Vocabulaire Electrotechnique
International (www.electropedia.org) qui n'ont pas été publiées dans des normes
individuelles.
Le texte de cet amendement est issu des demandes de modification suivantes approuvées
par le comité d'études 1 de l’IEC: Terminologie.
Demande de Approuvée
modification
C00009 2014-04-10(articles
non approvés se
sont pas inclus)
Toute information sur le vote ayant abouti à l'approbation des demandes de modification
constituant cet amendement est disponible sur le portail “IEV maintenance”.
_____________
IEC 60050-903:2013/AMD1:2014 – 1 –
© IEC 2014
Part 903 / Partie 903
Add the following new IEV entries and sections:
Ajouter les nouveaux articles et sections IEV suivants:

Section 903-01 – Safety and risk reduction
Section 903-01 – Sécurité et réduction des risques

903-01-21
normal operating condition
operating condition that represents as closely as possible the range of normal use that can
reasonably be expected
SOURCE: IEC 62368-1:2010, 3.3.7.4

condition normale de fonctionnement, f
condition de fonctionnement qui reflète le mieux la gamme des conditions d’utilisation
normale qu’il est raisonnable d’attendre
SOURCE: IEC 62368-1:2010, 3.3.7.4

903-01-22
abnormal operating condition
operating condition that is not a normal operating condition and is not a single fault condition
of the equipment itself
SOURCE: IEC 62368-1:2010, 3.3.7.1

condition anormale de fonctionnement, f
condition de fonctionnement qui n'est ni une condition normale de fonctionnement ni une
condition de premier défaut de l’équipement proprement dit
SOURCE: IEC 62368-1:2010, 3.3.7.1

Section 903-04 – Safety requirements for information technology equipment
Section 903-04 – Exigences de sécurité pour les appareils de traitement de
l'information
903-04-01
required withstand voltage
peak voltage that the insulation under consideration is required to withstand
SOURCE: IEC 62368-1:2010, 3.3.14.7

– 2 – IEC 60050-903:2013/AMD1:2014
© IEC 2014
tension de tenue prescrite, f
tension de crête que l'isolation considérée doit supporter
SOURCE: IEC 62368-1:2010, 3.3.14.7

903-04-02
peak working voltage
peak value of the working voltage, including any DC component and any repetitive peak
impulses generated in the equipment
SOURCE: IEC 62368-1:2010, 3.3.14.4

valeur de crête de la tension de service, f
tension de service crête, f
valeur crête de la tension de service, y compris tout composant en courant continu et les
impulsions de crête répétitives générées dans l'équipement
SOURCE: IEC 62368-1:2010, 3.3.14.4

903-04-03
mains transient voltage
highest peak voltage expected at the power input to the equipment, arising from external
transients on the mains
SOURCE: IEC 62368-1:2010, 3.3.14.2

tension transitoire du réseau d’alimentation, f
tension crête la plus élevée attendue au niveau de l’entrée d’énergie dans l’équipement,
provenant de transitoires externes vers le réseau d’alimentation
SOURCE: IEC 62368-1:2010, 3.3.14.2

903-04-04
potential ignition source
PIS
location where electrical energy can cause ignition
Note 1 to entry: This note applies to the French language only.
SOURCE: IEC 62368-1:2010, 3.3.9.1

source potentielle d’incendie, f
PIS, f
lieu où une énergie électrique peut provoquer une inflammation
Note 1 à l’article: L’abréviation «PIS» est dérivé du terme anglais développé correspondant à «potential ignition
source».
SOURCE: IEC 62368-1:2010, 3.3.9.1

IEC 60050-903:2013/AMD1:2014 – 3 –
© IEC 2014
903-04-05
resistive potential ignition source
resistive PIS
location where a component may ignite due to excessive power dissipation
SOURCE: IEC 62368-1:2010, 3.3.9.3

source potentielle d’incendie causé par un phénomène de résistivité, f
lieu où un composant peut s’enflammer en raison d’une puissance dissipée excessive
SOURCE: IEC 62368-1:2010, 3.3.9.3

903-04-06
movable equipment
equipment that is
• either limited in mass and not fixed in place,
• or provided with wheels, casters, or other means to facilitate movement by an ordinary
person as required to perform its intended use
Note 1 to entry: In some domains, "limited in mass" is considered to be "18 kg or less in mass".
SOURCE: IEC 62368-1:2010, 3.3.3.3

équipement déplaçable, m
équipement qui est
• soit de masse limitée et non fixé en place,
• soit fourni avec des roues, des roulettes ou un autre moyen permettant de faciliter les
mouvements qu'une personne ordinaire doit exécuter selon son utilisation prévue
Note 1 à l'article: Dans certains domaines, "de masse limitée" est considéré comme étant "de masse inférieure ou
égale à 18 kg".
SOURCE: IEC 62368-1:2010, 3.3.3.3

903-04-07
direct plug-in equipment
equipment in which the mains plug forms an integral part of the equipment enclosure so that
the equipment is supported by the mains socket-outlet
SOURCE: IEC 62368-1:2010, 3.3.3.1

équipement à enficher directement, m
matériel enfichable directement, m
équipement dans lequel la fiche de raccordement au réseau d'alimentation fait partie
intégrante de l'envelop
...