SIST IEC/TR2 60479-3:2000
(Main)Effects of current on human beings and livestock - Part 3: Effects of currents passing through the body of livestock
Effects of current on human beings and livestock - Part 3: Effects of currents passing through the body of livestock
Provides basic guidance on the effects of electric currents on livestock for use in the establishment of electrical safety requirements. Indicates values for the electrical impedance of the body of livestock as a function of touch voltage, the degree of moisture of the hide or skin and the current path. Values are only available for cattle. Describes the effects of sinusoidal alternating current within the frequency range from 15Hz to 100 Hz pass through the body of livestock. Has the status of a basic safety publication in accordance with Guide 104.
Effets du courant sur l'homme et les animaux domestiques - Partie 3: Effets de courant passant par le corps d'animaux domestiques
Donne des indications fondamentales sur les effets des courants électriques sur les animaux domestiques et sert de guide pour l'établissement de presriptions de sécurité électrique. Fournit des valeurs d'impédances électriques du corps d'animaux domestiques en fonction de la tension de contact, du degré d'humidité du cuir ou de la peau et du trajet du courant. Ces valeurs ne sont applicables qu'au bétail. Décrit les effets du courant alternatif sinusoïdal, pour des fréquences comprises entre 15Hz et 100Hz, passant à travers le corps d'animaux domestiques. A le statut d'une publication fondamentale de sécurité conformément au Guide 104 de la CEI.
Vplivi električnega toka na človeka in živali – 3. del: Vplivi tokov, ki tečejo skozi telo živali
General Information
Buy Standard
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IEC 60799
®
Edition 3.0 2018-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical accessories – Cord sets and interconnection cord sets
Petit appareillage électrique – Cordons-connecteurs et cordons-connecteurs
d’interconnexion
IEC 60799:2018-03(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60799
®
Edition 3.0 2018-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical accessories – Cord sets and interconnection cord sets
Petit appareillage électrique – Cordons-connecteurs et cordons-connecteurs
d’interconnexion
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.060.20; 29.120.30 ISBN 978-2-8322-5419-6
Warning! Make sure that you obtained this publication from an authorized distributor.
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® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 60799:2018 © IEC 2018
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General requirements . 6
5 Requirements . 7
5.1 Requirements for component parts . 7
5.2 Requirements for the assembly . 7
5.2.1 Rated voltage . 7
5.2.2 Rated current . 7
5.2.3 Class of equipment . 7
5.2.4 Marking . 7
5.2.5 Type of cord . 8
6 Continuity and polarity . 8
7 EMC requirements . 9
7.1 Immunity for cord sets and interconnection cord sets not incorporating
electronic components . 9
7.2 Emission for cord sets and interconnection cord sets not incorporating
electronic components . 9
Annex A (normative) Routine tests for factory-wired cord sets and interconnection
cord sets related to safety (protection against electric shock and correct polarity) . 10
A.1 General . 10
A.2 Polarized systems: phase (L) and neutral (N) – Correct connection . 10
A.3 Earth (PE) continuity . 11
A.4 Short-circuit/wrong connection and reduction in creepage distance and
clearance . 11
A.4.1 Accessible surface safety check . 11
A.4.2 Short-circuit/wrong connection . 11
Table 1 – Types of cords for cord sets and interconnection cord sets . 8
Table A.1 – Test overview . 10
---------------------- Page: 4 ----------------------
IEC 60799:2018 © IEC 2018 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL ACCESSORIES – CORD SETS
AND INTERCONNECTION CORD SETS
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC
Publication(s)"). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60799 has been prepared by subcommittee 23G: Appliance
couplers, of IEC technical committee 23: Electrical accessories.
This third edition cancels and replaces the second edition published in 1998. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) alignment with IEC 60320-1:2015;
1
b) extension to include appliance couplers in accordance with IEC 60320-2-3:– .
__________
1
Under preparation. Stage at the time of publication: IEC/FDIS 60320-2-3:2018.
---------------------- Page: 5 ----------------------
– 4 – IEC 60799:2018 © IEC 2018
The text of this International Standard is based on the following documents:
FDIS Report on voting
23G/393/FDIS 23G/397/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 6 ----------------------
IEC 60799:2018 © IEC 2018 – 5 –
ELECTRICAL ACCESSORIES – CORD SETS
AND INTERCONNECTION CORD SETS
1 Scope
This document specifies requirements for cord sets and interconnection cord sets for
household and similar general purpose equipment.
It does not apply to cord sets for industrial purposes (with plugs and connectors according to
IEC 60309) nor to cord extension sets.
NOTE Although electrical supply flexes provided with rewirable plugs and connectors are not cord sets in the
sense of this document, but considered as being similar to cord sets and serving the same purpose, the
requirements as specified in this document are also applicable to such assemblies as well as far as is reasonable.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements 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.
IEC TR 60083, Plugs and socket-outlets for domestic and similar general use standardized in
member countries of IEC
IEC 60227 (all parts), Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V
IEC 60245 (all parts), Rubber insulated cables – Rated voltages up to and including
450/750 V
IEC 60320-1, Appliance couplers for household and similar general purposes – Part 1:
General requirements
IEC 60320-2-3, Appliance coupler for household and similar general purposes – Part 2-3:
Appliance coupler with a degree of protection higher than IPX0
IEC 60884-1, Plugs and socket-outlets for household and similar purposes − Part 1: General
requirements
IEC 61140, Protection against electric shock – Common aspects for installation and
equipment
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
---------------------- Page: 7 ----------------------
– 6 – IEC 60799:2018 © IEC 2018
3.1
cord set
assembly consisting of one flexible cable or cord fitted with one non-rewirable plug and one
non-rewirable connector, intended for the connection of an electrical appliance or equipment
to the electrical supply
3.2
interconnection cord set
assembly consisting of one cable or cord fitted with one non-rewirable plug connector and one
non-rewirable connector, intended for the interconnection between two electrical appliances
[SOURCE: IEC 60050-442:1998, 442-07-06, modified – "a" has been changed to "one" in two
places, "flexible cable" has been replaced by "cable", and "between two electrical appliances"
replaces "of the electrical supply from one electrical appliance or equipment to another".]
3.3
non‐rewirable accessory
accessory so constructed that it forms a complete unit with flexible supply cable or cord after
connection and assembly by the manufacturer of the accessory
3.4
type test
test of one or more devices made to a certain design to show that the design meets certain
requirements
[SOURCE: IEC 60050-811:1991, 811-10-04, modified – In the definition, "requirements" has
replaced "specifications".]
3.5
routine test
test to which each individual device is subjected during and/or after manufacture to ascertain
whether it complies with certain criteria
[SOURCE: IEC 60050-811:1991, 811-10-05, modified – In the definition, "and/or" has
replaced "or".]
4 General requirements
Cord sets and interconnection cord sets shall be so designed and constructed that in normal
use their performance is reliable and without danger to the user or surroundings.
Tests shall be made to prove compliance with the requirements laid down in this document,
where applicable.
Tests are as follows:
• type tests are made on representative samples of each cord set and interconnection cord
set;
• routine tests are made on each cord set and interconnection cord set manufactured to this
document, where applicable.
NOTE Routine tests are specified in Annex A.
---------------------- Page: 8 ----------------------
IEC 60799:2018 © IEC 2018 – 7 –
5 Requirements
5.1 Requirements for component parts
The plug of a cord set shall comply with the requirements of IEC 60884-1.
The connector of a cord set or an interconnection cord set shall comply with the requirements
of IEC 60320-1.
The plug connector of an interconnection cord set shall comply with the requirements of
IEC 60320-1.
The connector, with a degree of protection higher than IPX0, of a cord set or an
interconnection cord set shall comply with the requirements of IEC 60320-2-3.
The plug connector, with a degree of protection higher than IPX0, of an interconnection cord
set shall comply with the requirements of IEC 60320-2-3.
The cord of a cord set or interconnection cord set shall comply with the requirements of
relevant IEC standards.
Compliance with the requirements for plugs, connectors, plug connectors and cords is
checked by the tests specified in the relevant standards. During the test of one component,
the influence on the other components of the assembly is ignored.
5.2 Requirements for the assembly
5.2.1 Rated voltage
The rated voltage of the connector and the cord shall be not less than the rated voltage of the
plug. For interconnection cord sets, the rated voltage of the connector and the plug connector
shall be the same.
5.2.2 Rated current
The rated current of the plug or plug connector shall be not less than the rated current of the
connector.
5.2.3 Class of equipment
The plug and the connector shall be of a type intended for the connection of the same class of
equipment, as given in IEC 61140.
A cord set comprising a connector for class II equipment may, however, comprise a plug with
three pins according to IEC TR 60083 or to other three-pin systems.
5.2.4 Marking
Plugs, connectors and plug connectors shall be marked as specified in the relevant standards.
Cord sets and interconnection cord sets that are not delivered together with an appliance and
of which the plug or the plug connector and the connector have not been made by the same
manufacturer shall, in addition, be marked with either the name, trademark or identification
mark of the maker of the complete cord set or interconnection cord set or of the responsible
vendor.
This marking shall not only be put on the package.
---------------------- Page: 9 ----------------------
– 8 – IEC 60799:2018 © IEC 2018
NOTE The marking of the name, trademark or identification mark of the maker or responsible vendor can, for
example, be applied on a sleeve provided around the cord set.
Plugs, connectors, cord sets or interconnection cord sets for the connection of class II
equipment shall not be marked with the symbol for class II construction (the double square).
5.2.5 Type of cord
The cord of a cord set or interconnection cord set shall be not lighter than the type and have a
cross-sectional area not less than those specified in Table 1, depending on the type of
connector incorporated in the cord set or interconnection cord set.
NOTE A cord of a lower IEC code designation is lighter than a cord of a higher code designation. For example,
60227 IEC 42 is lighter than 60227 IEC 53.
Table 1 – Types of cords for cord sets and interconnection cord sets
a
Type of connector Type of cord Nominal cross-sectional area
2
mm
b
0,2 A 60227 IEC 41 –
2,5 A for class I equipment 60227 IEC 52 0,75
c
2,5 A for class II equipment 60227 IEC 52 0,75
6 A 60227 IEC 52 0,75
d
10 A for cold conditions 60227 IEC 53 or 0,75
60245 IEC 53
d
10 A for hot conditions 60245 IEC 53 0,75
60245 IEC 89
d
10 A for very hot conditions 60245 IEC 53 0,75
60245 IEC 89
d
16 A for cold conditions 60227 IEC 53 or 1,0
60245 IEC 53
d
16 A for very hot conditions 60245 IEC 53 1,0
60245 IEC 89
NOTE For a cross-sectional area using American Wire Gauge (AWG), see Annex D of IEC 60320-1:2015.
a
Other cable or cord with equivalent properties may also be used.
b
In length not exceeding 2 m.
2
c
If the cord has a length not exceeding 2 m, a nominal cross-sectional area of 0,5 mm is allowed.
d
If the cord has a length exceeding 2 m, nominal cross-sectional areas shall be minimum
2
– 1,0 mm for 10 A connectors;
2
– 1,5 mm for 16 A connectors.
Compliance with the requirements of 5.2.1 to 5.2.5 is checked by inspection.
6 Continuity and polarity
In cord sets and interconnection cord sets for use in polarized systems, the continuity
between corresponding pins of plugs/plug connectors and contacts of connectors shall be
maintained correctly in each pole.
Compliance is checked by inspection.
---------------------- Page: 10 ----------------------
IEC 60799:2018 © IEC 2018 – 9 –
7 EMC requirements
NOTE Requirements for accessories incorporating electronic components are not included as the need has not
yet been established.
7.1 Immunity for cord sets and interconnection cord sets not incorporating electronic
components
These cord sets and interconnection cord sets are not sensitive to normal electromagnetic
disturbances and therefore no immunity tests are required.
7.2 Emission for cord sets and interconnection cord sets not incorporating electronic
components
These cord sets and interconnection cord sets are not generating electromagnetic
disturbances, consequently no emission tests are necessary.
NOTE These cord sets and interconnection cord sets can only generate electromagnetic disturbances during
occasional operations of insertion and withdrawal of the accessories. The frequency, the level and the
consequences of these emissions are considered as part of the normal electromagnetic environment.
---------------------- Page: 11 ----------------------
– 10 – IEC 60799:2018 © IEC 2018
Annex A
(normative)
Routine tests for factory-wired cord sets and interconnection cord sets
related to safety (protection against electric shock and correct polarity)
A.1 General
All factory wired cord sets and interconnection cord sets shall be subjected to the following
tests as shown in Table A.1.
Table A.1 – Test overview
Type of accessory Test to be performed
according to …
Two-pole accessories A.2, A.4.1
More than two-pole accessories A.2, A.3, A.4
Failed samples shall be treated in such a way that they cannot fulfill the intended function or
be separated from satisfactory products in such a way that they cannot be released for sale.
It shall be possible to identify that appliance couplers released for sale have been subjected
to the routine test.
The manufacturer shall maintain a record of the tests carried out that shows:
• type of product;
• date of test;
• place of manufacture (if manufactured in more than one place);
• tested quantity;
• number of failures and actions taken, i.e. destroyed/repaired.
The test equipment shall be checked before and after each period of use and for periods of
continuous use, at least every 24 h. During these checks, the equipment shall show that it
indicates faults when known faulty products are inserted or simulated faults are applied.
Products manufactured prior to a check shall only be released for sale if the check is found to
be satisfactory.
Test apparatus/equipment shall be verified/calibrated at least once a year.
Records shall be kept of all checks and any adjustments found necessary.
A.2 Polarized systems: phase (L) and neutral (N) – Correct connection
For polarized systems the test shall be made by applying a current for a period of not less
than 2 s between the L and N pin or contact and the corresponding L and N pin or contact of
the accessory (connector, plug connector or plug) at each end of the cord set or
interconnection cord set.
The period of 2 s may be reduced to not less than 1 s on test equipment with automatic
timing.
---------------------- Page: 12 ----------------------
IEC 60799:2018 © IEC 2018 – 11 –
Polarity shall be correct.
A.3 Earth (PE) continuity
The test shall be made applying a current for a period of not less than 2 s between the PE pin
or contact of the accessory (connector, plug connector or plug) at each end of the cord set or
interconnection cord set.
The period of 2 s may be reduced to not less than 1 s on test equipment with automatic
timing.
Other suitable tests may be used.
Continuity shall be present.
A.4 Short-circuit/wrong connection and reduction in creepage distance and
clearance
A.4.1 Accessible surface safety check
For cord sets and interconnection cord sets with non‐rewirable accessories (connectors, plugs
connectors and plugs), it shall be checked that live parts, for example loose strands, are not
coming through the accessible surface of the accessory.
If this danger cannot be prevented by the construction and/or suitable manufacturing
processes, the following test or a similar one (e.g. impulse voltage test) shall be performed.
The accessible surface of accessories (connectors, plugs connectors and plugs), except the
engagement face of the accessories, is scanned by adjusted electrodes and a pressure force
of 20 N.
Through the live parts and the surface of the appliance coupler, an AC voltage of
(2 000 ± 200) V shall be applied for at least 1 s.
Neither a flashover nor a breakdown shall occur.
A.4.2 Short-circuit/wrong connection
The test shall be made between the L and N conductors and the E conductor by applying at
the supply end an AC voltage of (2 000 ± 200) V, 50 Hz or 60 Hz for a period of not less than
2 s or by an impulse voltage test using 1,2/50 µs wave form, 4 kV peak value, three impulses
for each pole, with intervals of not less than 1 s, the test voltage being applied at the supply
end.
The period of 2 s may be reduced to not less than 1 s on test equipment with automatic
timing.
The L and N conductors may be connected together for this test.
No flashover shall occur.
___________
---------------------- Page: 13 ----------------------
– 12 – IEC 60799:2018 © IEC 2018
SOMMAIRE
AVANT-PROPOS . 13
1 Domaine d'application . 15
2 Références normatives . 15
3 Termes et définitions . 15
4 Exigences générales .
...
SLOVENSKI STANDARD
SIST IEC/TR2 60479-3:2000
01-februar-2000
9SOLYLHOHNWULþQHJDWRNDQDþORYHNDLQåLYDOL±GHO 9SOLYLWRNRYNLWHþHMRVNR]L
WHORåLYDOL
Effects of current on human beings and livestock - Part 3: Effects of currents passing
through the body of livestock
Effets du courant sur l'homme et les animaux domestiques - Partie 3: Effets de courant
passant par le corps d'animaux domestiques
Ta slovenski standard je istoveten z: IEC/TS 60479-3
ICS:
13.200 3UHSUHþHYDQMHQHVUHþLQ Accident and disaster control
NDWDVWURI
SIST IEC/TR2 60479-3:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST IEC/TR2 60479-3:2000
---------------------- Page: 2 ----------------------
SIST IEC/TR2 60479-3:2000
RAPPORT
CEI
TECHNIQUE – TYPE 2
IEC
60479-3
TECHNICAL
Première édition
REPORT – TYPE 2
First edition
1998-09
PUBLICATION FONDAMENTALE DE SÉCURITÉ
BASIC SAFETY PUBLICATION
Effets du courant sur l’homme
et les animaux domestiques –
Partie 3:
Effets de courants passant par le corps
d’animaux domestiques
Effects of current on human beings
and livestock –
Part 3:
Effects of currents passing through
the body of livestock
IEC 1998 Droits de reproduction réservés Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun any form or by any means, electronic or mechanical,
procédé, électronique ou mécanique, y compris la photo- including photocopying and microfilm, without permission in
copie et les microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http: //www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
N
PRICE CODE
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue
---------------------- Page: 3 ----------------------
SIST IEC/TR2 60479-3:2000
60479-3/TR © IEC:1998 – 3 –
CONTENTS
Page
FOREWORD . 5
INTRODUCTION . 9
Clause
1 General. 11
1.1 Scope . 11
1.2 General remarks . 11
1.3 Normative references. 13
1.4 Definitions. 13
2 Characteristics of the impedance of the body of livestock . 15
2.1 Internal impedance of animals (Z ). 17
i
2.2 Impedance of the hide and skin (Z ). 17
P
2.3 Impedance (resistance) of the hoof (Z , R ) . 17
h h
2.4 Total body impedance (Z ) . 19
T
2.5 Initial body resistance (R ) . 19
o
3 Values of the total body impedance (Z ) . 19
T
4 Values of the initial resistance of the body (R ). 21
o
5 Effects on livestock of sinusoidal alternating current in the range from 15 Hz to 100 Hz. 23
5.1 Threshold of reaction . 23
5.2 Threshold of immobilization. 23
5.3 Threshold of ventricular fibrillation. 23
Bibliography .29
Figures
Figure 1 – Current flow and impedances of the relevant parts of the body of a cow
for current path from the nose to the legs. 15
Figure 2 – Diagrams for an animal, for a current path from the nose to the four legs
(path A) and from the forelegs to the hindlegs (path B). 15
Figure 3 – Diagram for the total body impedance for cattle for a percentage
of 5 % of the population . 21
Figure 4 – Ventricular fibrillation for sheep . 25
Figure 5 – Minimum fibrillating currents of sheep as a function of weight for
a shock duration of 3 s . 27
Figure 6 – Minimum fibrillating currents (average) of various species of livestock
as a function of weight for a shock duration of 3 s . 27
Tables
Table 1 – Impedance (resistance) of the hooves of cattle (Z , R ) for a.c. voltages
h h
up to 230 V, 50/60 Hz . 17
Table 2 – Total body impedances Z for a.c. 50/60 Hz for cattle for touch voltages
T
up to 230 V. . 19
Table 3 – Initial body resistance R for cattle . 21
o
Table 4 – Threshold of ventricular fibrillation for a.c. 50/60 Hz for different species
of livestock, for a shock duration of 3 s . 25
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SIST IEC/TR2 60479-3:2000
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
–––––––––––––
EFFECTS OF CURRENT ON HUMAN BEINGS
AND LIVESTOCK –
Part 3: Effects of currents passing through the body of livestock
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization
for Standardization (ISO) in accordance with conditions determined by agreement between the two
organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
report of one of the following types:
• type 1, when the required support cannot be obtained for the publication of an
International Standard, despite repeated efforts;
• type 2, when the subject is still under technical development or where for any other
reason there is the future but no immediate possibility of an agreement on an International
Standard;
• type 3, when a technical committee has collected data of a different kind from that
which is normally published as an International Standard, for example "state of the art".
Technical reports of types 1 and 2 are subject to review within three years of publication to
decide whether they can be transformed into International Standards. Technical reports of
type 3 do not necessarily have to be reviewed until the data they provide are considered to be
no longer valid or useful.
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SIST IEC/TR2 60479-3:2000
60479-3/TR © IEC:1998 – 7 –
IEC 60479-3, which is a technical report of type 2, has been prepared by IEC technical
committee 64: Electrical installations of buildings.
The text of this technical report is based on the following documents:
Committee draft Report on voting
64/937/CDV 64/994/RVC
Full information on the voting for the approval of this technical report can be found in the report
on voting indicated in the above table.
IEC 60479 consists of the following parts under the general title Effects of current on human
beings and livestock
– Part 1:1994, General aspects;
– Part 2:1987, Special aspects – Chapter 4: Effects of alternating current with frequencies
above 100 Hz – Chapter 5: Effects of special waveforms of current – Chapter 6: Effects of
unidirectional single impulse currents of short duration;
– Part 3: Effects of currents passing through the bodies of livestock.
This document is issued in the type 2 technical report series of publications (according to
G.3.2.2 of part 1 of the ISO/IEC Directives) as a “Prospective standard for provisional
application" in the field of electrical installations of buildings (and the effects of current on
human beings and livestock) because there is an urgent requirement for guidance on how
standards of this format should be used to meet an identified need.
This technical report is not to be regarded as an “International Standard“. It is proposed for
provisional application so that information and experience of its use in practice may be
gathered. Comments on the content of this document should be sent to the IEC Central Office.
A review of this type 2 technical report will be carried out not later than three years after its
publication, with the options of either extension for a futher three years or conversion to an
International Standard or withdrawal.
This technical report has the status of a basic safety publication in accordance with IEC Guide 104.
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SIST IEC/TR2 60479-3:2000
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INTRODUCTION
This technical report provides basic guidance on the effects of electric currents on livestock
and is for use in the establishment of electrical safety requirements.
There are, however, other aspects to be taken into account, such as probability of faults,
probability of contact with live or faulty parts, touch voltage, fault voltage, experience gained,
technical feasibility and economics. These parameters need to be considered carefully when
fixing safety requirements, for example operating characteristics of protective devices for
electrical installations.
For protection against indirect contact of livestock, the threshold of ventricular fibrillation is the
criterion on which safety requirements should be fixed. For this reason, information is
presented in this part of IEC 60479 on the body impedance of livestock and on the current
magnitude of the threshold of ventricular fibrillation. As there is only little information on the
impedance of animals, the lowest impedance value for cattle, forelegs to hindlegs (see table 2),
has been used as the basis for calculation.
For the purpose of this report the following species of animals are considered to be livestock
which might in rural installations suffer from an electric shock: cattle, sheep, pigs and horses.
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SIST IEC/TR2 60479-3:2000
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EFFECTS OF CURRENT ON HUMAN BEINGS
AND LIVESTOCK –
Part 3: Effects of currents passing through the body of livestock
1 General
1.1 Scope
This technical report indicates values for the electrical impedance of the body of livestock as a
function of the touch voltage, the degree of moisture of the hide or skin and the current path.
At this time values are only available for cattle.
It describes the effects of sinusoidal alternating current within the frequency range from 15 Hz
to 100 Hz passing through the body of livestock.
NOTE – Unless otherwise specified, the current values defined in this technical report are r.m.s. values.
1.2 General remarks
For a given current path through the body, the danger depends mainly on the magnitude and
duration of the current flow. However, the time/current relations specified in clause 5 are, in
many cases, not directly applicable in practice for designing protection against electric shock.
The necessary criterion is the admissible limit of touch voltage (i.e. the product of the current
through the body and the body impedance) as a function of time. The relationship between
current and voltage is not linear because the impedance of the body of livestock varies with the
touch voltage, and data on this relationship is accordingly required.
The different parts of the body of livestock (such as the hide, skin, blood, muscles, other
tissues and joints) present to the electric current an impedance composed of resistive and
capacitive components. The dry hides in particular, in the range of voltages up to several
hundred volts, frequently present a high resistance.
The value of these impedances depends on a number of factors, in particular the species of
the animal, the current path, the touch voltage, the duration of current flow, the frequency, the
degree of moisture of the hide and/or the skin, the surface area of contact, the pressure
exerted and the temperature.
The impedance values indicated in this report result from close examination of the
experimental results available from measurements carried out principally on living animals.
Clause 5 is primarily based on the findings related to the effects of current at frequencies of
50 Hz or 60 Hz which are the most common in electrical installations. The values given are
deemed applicable to the frequency range from 15 Hz to 100 Hz, threshold values at the limits
of this range being higher than those at 50 Hz and 60 Hz.
This clause considers principally the risk of ventricular fibrillation which is the main cause of
fatal accidents in that range of frequencies.
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SIST IEC/TR2 60479-3:2000
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1.3 Normat
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