SIST EN 50499:2009

SLOVENSKI STANDARD
SIST EN 50499:2009
01-marec-2009
Postopki ocenjevanja izpostavljenosti delavcev elektromagnetnim sevanjem
Procedure for the assessment of the exposure of workers to electromagnetic fields
Verfahren für die Beurteilung der Exposition von Arbeitnehmern gegenüber
elektromagnetischen Feldern
Procédure pour l'évaluation de l'exposition des travailleurs aux champs
électromagnétiques
Ta slovenski standard je istoveten z: EN 50499:2008
ICS:
13.280 Varstvo pred sevanjem Radiation protection
17.240 Merjenje sevanja Radiation measurements
SIST EN 50499:2009 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50499:2009

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SIST EN 50499:2009

EUROPEAN STANDARD
EN 50499

NORME EUROPÉENNE
December 2008
EUROPÄISCHE NORM

ICS 17.240


English version


Procedure for the assessment of the exposure of workers
to electromagnetic fields



Procédure pour l'évaluation  Verfahren für die Beurteilung
de l'exposition des travailleurs der Exposition von Arbeitnehmern
aux champs électromagnétiques gegenüber elektromagnetischen Feldern





This European Standard was approved by CENELEC on 2008-10-21. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels


© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50499:2008 E

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SIST EN 50499:2009
EN 50499:2008 - 2 -
Foreword
This European Standard was prepared by the Technical Committee CENELEC TC 106X,
Electromagnetic fields in the human environment.
The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50499 on
2008-10-21.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2009-11-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-11-01
This European Standard has been prepared under Mandate M/351 given to CENELEC by the European
Commission and the European Free Trade Association and covers essential requirements of
EC Directive 2004/40/EC.
This standard is intended to be a standard under which other standards related to the assessment of a
work place can be used.
The approaches outlined in this standard, are intended to be simple, allowing most employers to make an
assessment with the minimum of technical knowledge and effort.
__________

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Contents
1 Scope . 4
2 Normative references. 4
3 Terms and definitions . 5
4 General considerations on assessment . 6
4.1 Introduction . 6
4.2 Overview of risk assessment procedure . 6
4.3 Indirect effects . 9
4.4 Uncertainty for assessments using Clauses 7, 8 and 9 . 9
5 Initial assessment . 9
6 Workplaces likely to require further assessment .13
7 Standards for specific work places .15
8 Methodology for assessing work place exposure by comparison
with the action values .15
9 Methodology for assessing work place exposure by comparison
with the exposure limit values .15
10 Methodology for taking measures .16
Annex A (normative) Other health and safety issues: indirect effects of fields and workers
 at particular risk .17
Annex B (informative) Documenting the risk assessment .19
Annex C (informative) CE-marked equipment.22
Annex D (informative) Simultaneous exposure to multiple frequencies: general process .24
Annex E (informative) Simultaneous exposure to multiple frequencies:
  The Total Exposure Quotient (TEQ) approach .28
Annex F (informative) AC electricity supplies.33
Annex G (informative) Zoning .41
Bibliography .43
Figures
Figure 1 – Assessment process .8
Figure G.1 – Zoning process . 42
Tables
Table 1 – A priori compliant workplaces and equipment . 10
Table 2 – Examples of equipment likely to require further assessment . 14
Table C.1 – List of EMF product standards . 23
Table F.1 – Electric and magnetic field action values for 50 Hz . 33
Table F.2 – Minimum distance of approach, in metres, to the centre of individual insulated
  conductors, based on the action value alone . 34
Table F.3 – Electric and magnetic field reference levels for 50 Hz . 38

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1 Scope
The scope of this European Standard is to provide a general procedure in order to assess workers’
exposure to electric, magnetic and electromagnetic fields in a work place to demonstrate compliance with
exposure limit values and action values as stated in the Council and European Parliament Directive
2004/40/EC.
The purpose of this European Standard is to
- specify how to perform an initial assessment of the levels of workers' exposure to electromagnetic
fields (EMF), if necessary including specific exposure assessment of such levels by measurements
and/or calculations,
- determine whether it is necessary to carry out a detailed risk assessment of EMF exposure.
This European Standard can be used by employers for the risk assessment and, where required,
measurement and/or calculation of the exposure of workers. Based on specific workplace
standards it can be determined whether preventive measures/actions must be taken to comply
with the provisions of the Directive.
The frequencies covered are from 0 Hz to 300 GHz.
NOTE 1  This European Standard is written under Mandate M/351 and relates to the exposure limits as specified in the Directive
2004/40/EC. It is intended to protect workers from risks to their health and safety arising or likely to arise from exposure to
electromagnetic fields (0 Hz to 300 GHz) during their work. However, this and other directives may include additional measures for
the protection of specific groups of workers and/or specific work places for which the employer is required to investigate other
protective measures as a part of the overall risk assessment. See Annex A.
NOTE 2  The Council and European Parliament Directive 2004/40/EC will be transposed into national legislation in all the
EU member countries. It is recommended that users of this standard consult the national legislation related to this transposition in
order to identify the national regulations and requirements. These national regulations and requirements may have additional
requirements that are not covered by this standard.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 50371, Generic standard to demonstrate the compliance of low power electronic and electrical
apparatus with the basic restrictions related to human exposure to electromagnetic fields (10 MHz –
300 GHz) – General public
EN 50400, Basic standard to demonstrate the compliance of fixed equipment for radio transmission
(110 MHz – 40 GHz) intended for use in wireless telecommunication networks with the basic restrictions
or the reference levels related to general public exposure to radio frequency electromagnetic fields, when
put into service
EN 50413, Basic standard on measurement and calculation procedures for human exposure to electric,
magnetic and electromagnetic fields (0 Hz – 300 GHz)
EN 60335-2-29, Household and similar electrical appliances – Safety – Part 2-29: Particular requirements
for battery chargers (IEC 60335-2-29)
EN 60335-2-45, Household and similar electrical appliances – Safety – Part 2-45: Particular requirements
for portable heating tools and similar appliances (IEC 60335-2-45)

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EN 60745-1, Hand-held motor-operated electric tools – Safety – Part 1: General requirements
(IEC 60745-1, mod.)
EN 61029-1, Safety of transportable motor-operated electric tools – Part 1: General requirements
(IEC 61029-1, mod.)
EN 62226-1, Exposure to electric or magnetic fields in the low and intermediate frequency range –
Methods for calculating the current density and internal electric field induced in the human body – Part 1:
General (IEC 62226-1)
EN 62226-2-1, Exposure to electric or magnetic fields in the low and intermediate frequency range –
Methods for calculating the current density and internal electric field induced in the human body –
Part 2-1: Exposure to magnetic fields – 2D models (IEC 62226-2-1)
EN 62226-3-1, Exposure to electric or magnetic fields in the low and intermediate frequency range –
methods for calculating the current density and internal electric field induced in the human body –
Part 3-1: Exposure to electric fields – Analytical and 2D numerical models (IEC 62226-3-1)
EN 62311, Assessment of electronic and electrical equipment related to human exposure restrictions for
electromagnetic fields (0 Hz – 300 GHz) (IEC 62311, mod.)
ETSI TR 101 870, Fixed radio transmitter sites – Exposure to non-ionising electromagnetic fields –
Guidelines for working conditions
1999/519/EC, Council Recommendation of 12 July 1999 on the limitation of exposure of the general
public to electromagnetic fields (0 Hz to 300 GHz)
2004/40/EC, Directive 2004/40/EC of the European Parliament and of the Council of 29 April 2004 on the
minimum health and safety requirements regarding the exposure of workers to the risks arising from
physical agents (electromagnetic fields) (18th individual Directive within the meaning of Article 16(1) of
Directive 89/391/EEC)
Further information on the scopes of these standards can be obtained from a national standardisation body who is a member of
CENELEC or at the CENELEC web site www.cenelec.eu.

3 Terms and definitions
3.1
action values
magnitude of directly measurable parameters provided in terms of electric field strength (E), magnetic
field strength (H), magnetic flux density (B) and power density (S), contact current and limb induced
current at which one or more of the specified measures in this Directive must be undertaken. Compliance
with these values will ensure compliance with the relevant exposure limit values (from 2004/40/EC)
3.2
employer
any natural or legal person who has an employment relationship with the worker and has responsibility for
the undertaking and/or establishment (from 89/391/EEC)
3.3
equipment
for the purpose of this standard, the term equipment is understood in a broad sense covering all sources
of electromagnetic emission, including devices, products, instrumentation, installations and prototypes
under development

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3.4
exposure
exposure occurs whenever and wherever a person is subjected to external electric, magnetic or
electromagnetic fields or to contact current
3.5
exposure limits
guideline or restriction values on exposure that are given in international or national standards, guidelines
or directives on human exposure to electromagnetic fields. For Directive 2004/40/EC the exposure limits
are the action values and the exposure limit values and also the other specific requirements in that
directive to avoid other risks related to workplace exposure to electromagnetic fields
3.6
exposure limit values
limits on exposure to electromagnetic fields which are based directly on established health effects and
biological considerations. Compliance with these limits will ensure that workers exposed to
electromagnetic fields are protected against all known adverse health effects (from 2004/40/EC)
3.7
risk assessment
process of determining compliance of a work place environment with the limits set in the Directive
2004/40/EC by performing the actions stated in Article 4 of the Directive 2004/40/EC
3.8
work place
location where workers have access as part of their duties
3.9
worker
any person employed by an employer, including trainees and apprentices but excluding domestic
servants (from 89/391/EEC)
4 General considerations on assessment
4.1 Introduction
This clause describes the general concept of an initial assessment of a work place, how to compare
assessment results with the action values and exposure limits, and further actions if needed.
The exposure to be assessed is at the work place(s) where a worker is permitted to be present. Work
place exposure level is assessed at locations (“work spaces”) to which a worker would have access as
part of their duties, and its contributors are emissions from equipment affecting that location.
Other health and safety issues covered by the Directive, in particular workers with active implanted
medical devices (AIMDs), pregnant workers, and indirect effects shall be addressed, e.g. as outlined in
Annex A.
Annex B offers two forms that may be used to document the result of the assessment.
4.2 Overview of risk assessment procedure
The flowchart presented in Figure 1 shows graphically the assessment process. Prior to commencing the
assessment process, and in order to determine what level of work place assessment, if any, is necessary
the work place must first be characterised. This requires the employer to establish what electrical
equipment exists in the work place and is emitting electromagnetic fields into the work place.

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The first decision box of Figure 1 relates to compliant equipment. Most work places will contain only
electrical equipment which either does not produce electromagnetic fields or produces them at levels
below general public exposure limits. These work places will require no further assessment. Clause 5
defines which electrical equipment can be excluded from detailed exposure assessment. Table 1 defined
in Clause 5 provides examples of such equipment. It includes in particular any equipment which has been
placed on the European market in compliance with the relevant community directives. Examples of EMF
related harmonised standards are listed in Annex C.
NOTE Zoning concepts defined when the compliance of the equipment was assessed can be implemented in agreement with
Annex G.
Table 2 in Clause 6 gives a non-exhaustive list of equipment which is likely to require further assessment
In preparation for this, the employer should identify the type of equipment in the work place,
characteristics (e.g. frequency, emitted power, duty factor) and its normal conditions of use (e.g. normal
position of operator, position of other workers than the operator, time spent at normal position, operations
or maintenance or repair at distances from the emitting equipment closer than those recommended in the
manufacturers instructions etc.). See Clause 6.
The term “normal” covers the intended use, the use as specified in the employers instructions to the
workers, the installation(s) used, the instructions from the employer on how maintenance and repair shall
be performed, situations of foreseeable incidents, and situations of foreseeable misuse.
Situations with simultaneous exposure to multiple sources and/or multiple frequencies shall be
addressed. The employer can use the equations defined in Annex D, which provide a conservative way to
demonstrate compliance with Directive 2004/40/EC. The employer may optionally use other appropriate
methods e.g. time domain assessment procedures as provided in EN 62311 or the TEQ approach
described in Annex E, which includes additional overestimation.

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Technical and/or organisational
measures [Clause 10]
SIST EN 50499:2009
EN 50499:2008 - 8 -
Start of assessment
End of assessment
Yes
All equipment
document result as
at workplace listed
required
in Table 1?
See 4.2
and Annex B
No
Yes
Specific
Assessment via
workplace standard
that standard
[Clause 7]?
No
Selection of method
Assessment Procedures from other basic,
against
generic or product standards
Action Values
[Clause 8]
Assessment
Action against
No No
Values Exposure Limit
met? Values
[Clause 9]
Yes
Exposure
Limits Values
met?
No
End of assessment Yes
document result as required
See 4.2 and Annex B

NOTE Optional measures to reduce exposure may be introduced at any point of the assessment in order to achieve compliance.
Figure 1 – Assessment process

Technical and/or organisational
measures [Clause 10]

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If a specific standard is applicable to the working environment or type of work place, then it is
recommended to use that for the assessment. See Clause 7. If this standard contains other exposure
limits than those stated in the Directive then the exposure limits from the Directive shall be applied.
If no such standard exists or if the employer considers it unsuitable then an exposure assessment shall
be performed either against action values (see Clause 8) or directly against exposure limits
(see Clause 9) using procedures from other basic, generic or product standards.
NOTE For some equipment considered in the assessment of the work place it may be appropriate to undertake an assessment
against the exposure limits directly, and specific assessment standards for that equipment will indicate how that should be done.
Other equipment in the same work place may be assessed by comparison with the action values.
When comparison is made between the measured exposure levels and the action values or exposure
limits, then it may be appropriate to take into account the duration of exposure under normal working
conditions, and also the duty cycle of the emission(s) from the equipment in the work place. In general
time-averaging can be applied above 10 MHz, and cannot be applied below 100 kHz. Between these
frequencies it may be permissible to apply time-averaging subject to constraints on maximum
instantaneous exposure. For frequencies between 100 kHz and 10 MHz exposure limits based on SAR
can be time averaged but exposure limits based on induced current in the central nervous system cannot.
This is described more fully in generic or specific standards e.g. in EN 62311.
When measurements or calculations are used for a detailed exposure assessment, uncertainty analysis
shall be performed according to the specific assessment method or standard applied.
If the assessment indicates that exposures in the work place do not meet the exposure limit values of the
Directive, then measures must be taken to ensure that they do (see Clause 10) and the assessment
process repeated until compliance is attained.
4.3 Indirect effects
The employer shall give particular attention, when carrying out the risk assessment, to any indirect effects
as defined in Article 4, Clause 5(d) of the Directive 2004/40/EC. Information about the specific standards
dealing with indirect effects can be found in Annex A.
4.4 Uncertainty for assessments using Clauses 7, 8 and 9
As a part of the assessment process measurements and/or calculations shall be associated with an
uncertainty evaluation. Assessment uncertainty shall be reported (see Annex B) and it shall be taken into
account when performing compliance evaluation according to national regulation in relation to the
implementation of the directive.
5 Initial assessment
If the work place is affected only by equipment listed in Table 1 that work place is deemed to comply with
this standard without further assessment. This is valid regardless of the number of pieces of electrical
equipment present at the work place.
To be considered within this initial assessment the equipment must have been installed and must be used
in accordance with the manufacturers´ instructions. Exposure situations for example during maintenance
and production of equipment may be different from the exposure during normal usage of the equipment
and should be assessed separately. In some situations a reassessment of exposure may be necessary
after maintenance/repair/modification of an equipment.
Low power equipment that can be shown to comply with EN 50371, see note, is covered by Table 1 even
if it is not CE-marked.
NOTE EN 50371 limits the frequency range to 10 MHz – 300 GHz and the transmitted power to 20 mW average and 20 W peak.

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Table 1 – A priori compliant workplaces and equipment
Item Designation of Type of equipment Remarks
work place
T.1.1 Work places open Work places open to the public
to the general and in compliance with the
public covered by exposure limits given in the
4.3 of Directive European Council
2004/40/EC recommendation 1999/519/EC
are deemed to comply.
T.1.2 All places CE-marked equipment which have been Equipment must be installed
assessed using the harmonised EMF and used in accordance with the
standards see examples in Annex C. manufacturers instructions.
T.1.3 All places Equipment placed on the European Some equipment placed on the
market in compliance with the European European market may also be
recommendation 1999/519/EC as compliant with the European
required by the relevant directives in recommendation 1999/519/EC
particular in compliance with their related although they have not received
harmonized standards listed in the the CE marking, for example if it
OJEU. Examples are provided in is part of an installation.
Annex C.
T.1.4 All places Lighting equipment Excluding specialized RF
energized lighting.
T.1.5 All places Computer and IT equipment
T.1.6 All places Office equipment Tape erasers may need further
assessment.
T.1.7 All places Mobile phones, and cordless phones
T.1.8 All places Two-way radios Only types with time averaged
emitted power less than 20 mW.
T.1.9 All places Base stations for DECT cordless phones Limited to equipment intended
and WLAN (e.g. Wi-Fi) for use by the general public.
T.1.10 All places Non - wireless communication
equipment and networks
T.1.11 All places Electric handheld and transportable tools e.g. covered by the scope of
EN 60745-1 and EN 61029-1
see Annex C.

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Table 1 – A priori compliant workplaces and equipment
(continued)
Item Designation of Type of equipment Remarks
work place
T.1.12 All places Portable heating tools e.g. covered by the scope of
EN 60335-2-45 (e.g. glue guns,
heat guns)
See Annex C.
Induction heating tools and
dielectric heating tools are
excluded from Table 1.
T.1.13 All places Battery chargers Covered by the scope of
EN 60335-2-29. The scope
covers chargers for normal
household use and chargers
intended for use in garages,
shops, light industry and on
farms
See Annex C.
T.1.14 All places Electric operated garden appliances
T.1.15 All places Audio & video equipment Special types using radio
transmitters typically used by
the broadcast industry may
need further assessment.
T.1.16 All places Portable battery powered equipment not
including radio frequency transmitters
T.1.17 All places Electrical room heating equipment Microwave heaters are
excluded from this table.
T.1.18 All places All non-electrical equipment

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Table 1 – A priori compliant workplaces and equipment
(continued)
Item Designation of Type of equipment Remarks
work place
T.1.19 All places Electricity supply networks (50 Hz) in the The criteria given here for
work place and electricity distribution demonstrating compliance with
and transmission circuits passing work place exposure limits are
through or over the work place. The based on demonstrating that the
magnetic and electric field exposure are exposures are lower than the
considered separately. lower limits of the
EC Recommendation (1999) of
EMF exposures for the general
For magnetic field exposures the
public. These criteria are
following are compliant:
sufficient for demonstrating
compliance in the majority of
• any electrical installation with a
work places.
phase current rating of 100 A or less;
• any individual circuit within an
installation, with a phase current Assessment criteria, based
rating of 100 A or less;
directly on the work place
exposure limits of the
• any circuit where the conductors are
close together and having a net EC Directive, are given in
Annex F. They use 500 A in
current of 100 A or less;
place of 100 A, 200 kV instead
• all components of the networks
of 100 kV and 250 kV instead of
satisfying the criteria above are
125 kV. Thus the checklist in
covered, (including the wiring,
F.2.4 may be used for
switchgear, transformers etc.);
demonstrating compliance for
• any overhead bare conductors.
magnetic fields, and F.3.1 may
For electric fields exposures the
be used for demonstrating
following are compliant:
compliance for electric fields, in
any work place.
• any underground or insulated cable
circuit, rated at any voltage,

• any overhead bare circuit rated at a
voltage up to 100 kV, or overhead
line up to 125 kV, oversailing the
work place, or at any voltage where
the workplace is indoors.
T.1.20 All places Instrumentation, measurement and
control equipment
T.1.21 All places Household appliances Professional appliances like
cookers, laundry machines,
microwave ovens etc. used in
restaurants, shops etc. are also
included in this table.
Professional inductive cooking
equipment is ex
...