- IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication.
- In many countries, instructions and equipment marking related to safety are required to be in a language that is acceptable in the country in which the equipment is to be installed. Servicing instructions are normally made available only to SERVICE PERSONS and are generally acceptable in the English language only.
- In Germany , safety-related information, even for SERVICE PERSONS, has to be in the German language.
- In Canada , the instructions and markings should be in French and English.
- In Finland, Norway and Sweden, CLASS I PLUGGABLE EQUIPMENT TYPE A intended for connection to other equipment or a network, must, if safety relies on connection to protective earth or if surge suppressors are connected between the network terminals and accessible parts, have a marking stating that the equipment must be connected to an earthed mains socket-outlet.
- Power Rating
- Equipment shall be provided with a power rating marking, the purpose of which is to specify a supply of correct voltage and frequency, and of adequate current-carrying capacity.
- For equipment intended to be installed by an OPERATOR, the marking shall be readily visible in an
OPERATOR ACCESS AREA, including any area that is directly visible only after an OPERATOR has opened
a door or cover.
- If a manual voltage selector is not OPERATOR-accessible, the marking shall
indicate the RATED VOLTAGE for which the equipment is set during manufacture; a temporary
marker is permitted for this purpose.
- Marking is permitted on any outer surface of the equipment, except the bottom of equipment having a mass exceeding 18 kg.
- on STATIONARY EQUIPMENT, the marking shall be visible after the equipment has been installed as in normal use.
- For equipment intended to be installed by a SERVICE PERSON, and if the marking is in a SERVICE
ACCESS AREA, the location of the permanent marking shall be indicated in the installation
instructions or on a readily visible marker on the equipment. It is permitted to use a temporary
marker for this purpose.
- The marking shall include the following:
- RATED VOLTAGE(S) or RATED VOLTAGE RANGE(S), in volts;
- if equipment is to be connected to both of the line conductors and to the
neutral conductor of a single-phase, three-wire power distribution system, the
marking shall give the line-to-neutral voltage and the line-to-line voltage,
separated by a solidus (/), with the added notation ˛Three wires plus
protective earth˛, ˛3W + PE˛ or equivalent.
- symbol for nature of supply, for d.c. only
- RATED FREQUENCY or RATED FREQUENCY RANGE, in hertz, unless the equipment is designed
for d.c. only;
- RATED CURRENT, in milliamperes or amperes;
- for equipment with multiple RATED VOLTAGES, the corresponding RATED CURRENTS
shall be marked such that the different current ratings are separated by a
solidus (/) and the relation between RATED VOLTAGE and associated RATED
CURRENT appears distinctly;
- equipment with a RATED VOLTAGE RANGE shall be marked with either the
maximum RATED CURRENT or with the current range;
- the marking for RATED CURRENT of a group of units having a single supply
connection shall be placed on the unit which is directly connected to a MAINS
SUPPLY. The RATED CURRENT marked on that unit shall be the total maximum
current that can be on circuit at the same time and shall include the combined
currents to all units in the group that can be supplied simultaneously through
the unit and that can be operated simultanously.
- manufacturer’s name or trade-mark or identification mark;
- manufacturer’s model identification or type reference;
- symbol (IEC 60417-5172 (DB:2003-02)), for CLASS II EQUIPMENT only, except where
this is forbidden by 2.6.2.
- Additional markings are permitted, provided that they do not give rise to misunderstanding.
- Operator access with a tool An acceptable marking for an electric shock hazard is (ISO 3864, No. 5036).
- Short duty cycles The marking of RATED OPERATING TIME shall correspond to normal use.
The marking of the RATED OPERATING TIME shall precede the marking of the RATED RESTING TIME (if
given), the two markings being separated by a solidus (/).
- Supply voltage adjustment Unless the means of adjustment is a simple control near the power rating marking, and the setting of this control is obvious by inspection, the following instruction or a similar one shall appear in or near the power rating marking:
- Power outlets on the equipment If any standard power supply outlet in the equipment is accessible to the OPERATOR, a marking shall be placed in the vicinity of the outlet to show the maximum load that is permitted to be connected to it.
- Fuse identification
Marking shall be located adjacent to each fuse or fuseholder, or on the fuseholder, or in another
location provided that it is obvious to which fuse the marking applies, giving the fuse current
rating and, where fuses of different voltage rating value could be fitted, the fuse voltage rating.
- Terminals for d.c. mains supply conductors
If a single terminal is provided, both as a main protective earthing terminal in the equipment and
for the connection to one pole of the DC MAINS SUPPLY, it shall be marked as specified in 126.96.36.199,
in addition to polarity marking.
- Controls and indicators - Identification, location and marking
- Unless it is obviously unnecessary, indicators, switches and other controls affecting safety shall
be identified or located so as to indicate clearly which function they control.
Markings and indications for switches and other controls shall be located either:
- on or adjacent to the switch or control, or
- elsewhere, provided that it is obvious to which switch or control the marking applies
- Markings using figures
If figures are used for indicating different positions of any control, the ˛OFF˛ position shall be
indicated by the figure 0 (zero) and higher figures shall be used to indicate greater output, input,
- Isolation of multiple power sources
Where there is more than one connection supplying HAZARDOUS VOLTAGES or HAZARDOUS ENERGY
LEVELS to equipment, a prominent marking, located close to the entry point provided for a SERVICE
PERSON to gain access to the hazardous parts, shall be provided to indicate which disconnect
device or devices isolate the equipment completely and which disconnect devices can be used
to isolate each section of the equipment.
Any marking required by this standard shall be durable and legible. In considering the durability
of the marking, the effect of normal use shall be taken into account.
- Removable parts
Marking required by this standard shall not be placed on removable parts that can be replaced
in such a way that the marking would become misleading.
- Replaceable batteries
If an equipment is provided with a replaceable battery, and if replacement by an incorrect type
could result in an explosion (for example, with some lithium batteries), the following applies:
- if the battery is placed in an OPERATOR ACCESS AREA, there shall be a marking close to
the battery or a statement in both the operating and the servicing instructions;
- if the battery is placed elsewhere in the equipment, there shall be a marking close
to the battery or a statement in the servicing instructions.
- Battery compartments marking next to the door, or on the door if the door is secured to the
equipment, with instructions for protection of the USER once the door is opened.
- Protection in restricted access locations However, appropriate markings and instructions shall be provided for protection against energy hazards if a HAZARDOUS ENERGY LEVEL exists.
- Energy hazards
- Protection by earthing For PLUGGABLE EQUIPMENT TYPE B, having connections to TELECOMMUNICATION NETWORKS or to CABLE DISTRIBUTION SYSTEMS that are all pluggable, a marking on the equipment and a
statement in the installation instructions shall be provided. These shall specify that the
USER is to disconnect all TELECOMMUNICATION NETWORK connectors and CABLE DISTRIBUTION
SYSTEM connectors before disconnecting the POWER SUPPLY CORD.
- Protective Earthing a suitable marking shall indicate to a SERVICE PERSON that such parts
are not earthed and should be checked for HAZARDOUS VOLTAGE before being touched
- Unearthed parts
- FUNCTIONAL EARTHING Other markings such as one of the symbols, (IEC 60417-5018 (DB:2002-10)) or (IEC 60417-5020 (DB:2002-10)), if appropriate, are permitted.
- Warning to service persons
- Suitable marking shall be provided on the equipment or a statement shall be provided in the servicing instructions to alert a SERVICE PERSON to a possible hazard, where both of the following conditions exist:
- a fuse is used in the neutral of single-phase equipment either permanently
connected or provided with a non-reversible plug; and
- after operation of the fuse, parts of the equipment that remain energized might
represent a hazard during servicing.
- Bonding conductors
- External protective devices
- Neutral fusing
- Overvoltage Categories
- DC MAINS SUPPLY the equipment is marked with instructions or a reference to instructions for proper
earthing and bondinof the system and equipment. The marking shall be permanent
and located near and in plain view of the field wiring terminals.
- telephone ringing and other signals be so located and guarded that unintentional contact with such parts is unlikely during service operations, or be provided with a marking to warn
SERVICE PERSONNEL of the presence of continuous ringing signals.
- Grouping of wiring terminals
- Disconnect devices
- Two-pole disconnect devices
- Four-pole disconnect devices
- Plugs as disconnect devices
- Interconnected equipment
- Multiple power sources Where a unit receives power from more than one source (for example, different voltages or frequencies or as backup power), there shall be a prominent marking at each disconnect device
giving adequate instructions for the removal of all power from the unit.
- Equipment stability During operations performed by a SERVICE PERSON, the stabilizing means, if needed, shall either be automatic in operation, or a marking shall be provided to instruct the SERVICE PERSON to deploy the stabilizing means.
- Impact test
- Adjustable controls Equipment shall be provided with a power rating marking, the purpose of which is to specify a supply of correct voltage and frequency, and of adequate current-carrying capacity.
- Plugs and sockets Keying, location or, in the case of connectors accessible
only to a SERVICE PERSON, clear markings are permitted to meet the requirement.
- UV radiation It is permitted for the above marking to be beside a door or cover, or on a door provided that the door is secured to the equipment. The above marking is not required for a door or cover that is provided with a SAFETY INTERLOCK switch (see 2.8) that disconnects power to the UV lamp when the door or cover is opened, or any other mechanism that prevents UV radiation. If the UV radiation symbol is used on the equipment, both the symbol and a warning similar to the above marking shall appear together in the USER and servicing instructions.
- Unattended equipment For equipment not intended for continuous operation, the test is repeated until the temperature has stabilized, regardless of any marking of RATED OPERATING TIME or RATED RESTING TIME. For this test the THERMOSTATS, TEMPERATURE LIMITERS and THERMAL CUT-OUTS are not short-circuited.
- Hazardous moving parts
- Table 4C Marking of hot parts
- Touch temperatures
- Equipment on non-combustible floors
- Removable doors and covers Marking required by this standard shall not be placed on removable parts that can be replaced in such a way that the marking would become misleading.
- TOUCH CURRENT exceeding 3,5 mA
- Summation of TOUCH CURRENTS
- Earthing for a TELECOMMUNICATION NETWORK
- Earthing for a CABLE DISTRIBUTION SYSTEM
- Equipment in Overvoltage Categories III and IV
- UL 969 , Marking and Labeling Systems.
- CSA C22.2 No. 0.15Adhesive Labels
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