-
BRITISH STANDARD
BS EN
50395:2005
Electrical test methods
for low voltage energy
cables
ICS 29.060.20
+ A1 :201 1
Copyright British Standards Institution Provided by IHS under
license with BSI - Uncontrolled Copy
Not for ResaleNo reproduction or networking permitted without
license from IHS
--`,,```,,,,````-`-`,,`,,`,`,,`---
-
National foreword
This British Standard is the UK implementation of EN
50395:2005+A1:2011. It supersedes BS EN 50395:2005, which is
withdrawn.The start and finish of text introduced or altered by
amendment is indicated in the text by tags. Tags indicating changes
to CENELEC text carry the number of the CENELEC amendment. For
example, text altered by CENELEC amendment A1 is indicated by
!".The UK participation in its preparation was entrusted by
Technical Committee GEL/20, Electric cables, to Subcommittee
GEL/20/17, Electric Cables - Low voltage.A list of organizations
represented on this subcommittee can be obtained on request to its
secretary. This publication does not purport to include all the
necessary provisions of a contract. Users are responsible for its
correct application.Compliance with a British Standard cannot
confer immunity from legal obligations.
BS EN 50395:2005+A1:2011
This British Standard waspublished under the authorityof the
Standards Policy andStrategy Committeeon 14 November 2005
BSI 2011
ISBN 978 0 580 67085 5
Amendments/corrigenda issued since publication
Date Comments
31 October 2011 Implementation of CENELEC amendment A1:2011
Copyright British Standards Institution Provided by IHS under
license with BSI - Uncontrolled Copy
Not for ResaleNo reproduction or networking permitted without
license from IHS
--`,,```,,,,````-`-`,,`,,`,`,,`---
-
EUROPEAN STANDARD EN 50395:2005+A1
NORME EUROPENNE
EUROPISCHE NORM
CENELEC
European Committee for Electrotechnical Standardization
Comit Europen de Normalisation Electrotechnique
Europisches Komitee fr Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
2005 CENELEC - All rights of exploitation in any form and by any
means reserved worldwide for CENELEC members.
Ref. No. EN 50395:2005 E
ICS 29.060.20 Partly supersedes HD 21.2 S3:1997 + A1:2002
&
HD 22.2 S3:1997 + A1:2002
English version
Electrical test methods for low voltage energy cables
Mthodes d'essais lectriques Elektrische Prfverfahren
fr Niederspannungskabel und -leitungen
This European Standard was approved by CENELEC on 2005-07-01.
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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.
March 2011
Copyright British Standards Institution Provided by IHS under
license with BSI - Uncontrolled Copy
Not for ResaleNo reproduction or networking permitted without
license from IHS
--`,,```,,,,````-`-`,,`,,`,`,,`---
-
2
Foreword
This European Standard was prepared by the Technical Committee
CENELEC TC 20, Electric cables.
In accordance with the decision of TC 20 at its Setubal meeting
(June 2004), the text of the draft was
submitted to the formal vote. It was approved by CENELEC as EN
50395 on 2005-07-01.
This European Standard, together with EN 50396:2005, supersedes
HD 21.2 S3:1997 + A1:2002 and
HD 22.2 S3:1997 + A1:2002.
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) 2006-07-01
latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2008-07-01
__________
Foreword to amendment A1
This amendment was prepared by the Technical Committee CENELEC
TC 20, Electric cables.
The text of the draft was submitted to the Unique Acceptance
Procedure and was approved by CENELEC as amendment A1 to EN
50395:2005 on 2011-03-14.
The following dates were fixed: latest date by which the
amendment has to be implemented
at national level by publication of an identical national
standard or by endorsement
(dop)
2012-03-14
latest date by which the national standards conflicting with the
amendment have to be withdrawn
(dow)
2014-03-14
__________
BS EN 50395:2005+A1:2011 EN 50395:2005+A1:2011 (E)
Copyright British Standards Institution Provided by IHS under
license with BSI - Uncontrolled Copy
Not for ResaleNo reproduction or networking permitted without
license from IHS
--`,,```,,,,````-`-`,,`,,`,`,,`---
-
3
Contents
Page
Introduction.............................................................................................................................................5
1
Scope................................................................................................................................................5
2 Normative
references......................................................................................................................5
3 General requirements
.....................................................................................................................6
3.1
Pre-conditioning......................................................................................................................6
3.2 Test temperature
....................................................................................................................6
3.3 Test voltage
............................................................................................................................6
3.4 Test values
.............................................................................................................................6
4
Definitions........................................................................................................................................6
5 Electrical d.c. resistance of conductor
.........................................................................................6
6 Voltage test on completed cable
...................................................................................................6
7 Voltage test on cores in water
.......................................................................................................7
7.1 Test sample
............................................................................................................................7
7.2 Procedure
...............................................................................................................................7
7.3 Requirement
...........................................................................................................................7
8 Insulation resistance test
...............................................................................................................7
8.1 Insulation resistance for cables having maximum conductor
temperatures
not exceeding 90 C
...............................................................................................................7
8.1.1 Test sample
...............................................................................................................7
8.1.2 Procedure
..................................................................................................................8
8.1.3 Requirement
..............................................................................................................8
8.2 Insulation resistance for cables with maximum conductor
temperatures
exceeding 90 C
.....................................................................................................................8
8.2.1 Test sample
...............................................................................................................8
8.2.2 Procedure
..................................................................................................................8
8.2.3 Requirement
..............................................................................................................8
9 Long term resistance of insulation to
d.c.....................................................................................9
9.1 Test sample
............................................................................................................................9
9.2 Procedure
...............................................................................................................................9
9.3 Requirement
.........................................................................................................................10
10 Check for the absence of faults in insulation
............................................................................10
10.1 General
.................................................................................................................................10
10.2 Spark
test..............................................................................................................................10
10.2.1 Procedure
................................................................................................................10
10.2.2 Requirement
............................................................................................................10
10.3 Voltage
test...........................................................................................................................10
10.3.1 Procedure
................................................................................................................10
BS EN 50395:2005+A1:2011 EN 50395:2005+A1:2011 (E)
Copyright British Standards Institution Provided by IHS under
license with BSI - Uncontrolled Copy
Not for ResaleNo reproduction or networking permitted without
license from IHS
--`,,```,,,,````-`-`,,`,,`,`,,`---
-
4
10.3.2 Requirement
............................................................................................................10
11 Surface resistance of sheath
.......................................................................................................11
11.1 Test samples
........................................................................................................................11
11.2 Procedure
.............................................................................................................................11
11.3 Requirement
.........................................................................................................................11
12 Transfer impedance
......................................................................................................................11
Annex A
.................................................................................................................................................12
A.1 Basic
formula........................................................................................................................12
A.2 Rounding
..............................................................................................................................12
A.3 Examples of
calculation........................................................................................................12
Annex B (informative) Source of electrical test methods in EN
50395.............................................13
Bibliography..........................................................................................................................................14
Figure 1 Positioning of electrodes
.........................................................................................................9
BS EN 50395:2005+A1:2011 EN 50395:2005+A1:2011 (E)
Copyright British Standards Institution Provided by IHS under
license with BSI - Uncontrolled Copy
Not for ResaleNo reproduction or networking permitted without
license from IHS
--`,,```,,,,````-`-`,,`,,`,`,,`---
-
5
Introduction
EN 50395 contains the electrical test methods that are used for
harmonized low voltage energy
cables. These electrical test methods include all those
previously contained in HD 21 and HD 22.
Annex B gives a comparison between the original location of each
test method and its place in this
new European Standard.
The content of EN 50395 is not, and will not be, restricted only
to test methods for cables to HD 21
and HD 22. Other test methods for harmonized LV cables may be
included. Furthermore, the use of
test methods in EN 50395 for cables outside HD 21 and HD 22 is
not prohibited, but it is strongly
recommended that expert advice be taken before such use, or
before any proposal for incorporation
into another standard.
1 Scope
EN 50395 contains electrical test methods required for the
testing of harmonized low voltage energy
cables, especially those rated at up to and including 450/750
V.
NOTE 1 A description of the origin of these test methods and the
background to this European Standard is given in the
Introduction and in Annex B.
The particular cable standard dictates the tests which need to
be performed on the relevant cable
type. It also specifies whether the specific test is a type test
(T), a sample test (S) or a routine test (R)
for the particular cable type.
NOTE 2 T, S and R are defined in the relevant cable
standard.
The requirements to be met during or after the test are
specified for the particular cable type in the
relevant cable standard. However, some test requirements are
obvious and universal, such as the fact
that no breakdown shall occur during voltage tests, and these
are stated in the particular test method.
Test methods for use specifically in utility power cables are
not covered by this European Standard.
They can be found in HD 605.
Test methods for use specifically in communications cables are
the responsibility of the Technical
Committee CENELEC TC 46X, Communication cables. At present such
test methods are given in
EN 50289 series.
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 50289-1-6 2002 Communication cables Specifications for test
methods -
Part 1-6: Electrical test methods Electromagnetic
performance
EN 60228 2005 Conductors of insulated cables
EN 62230 2007 Electric cables Spark test method ! "
BS EN 50395:2005+A1:2011 EN 50395:2005+A1:2011 (E)
Copyright British Standards Institution Provided by IHS under
license with BSI - Uncontrolled Copy
Not for ResaleNo reproduction or networking permitted without
license from IHS
--`,,```,,,,````-`-`,,`,,`,`,,`---
-
6
3 General requirements
3.1 Pre-conditioning
All the tests shall be carried out not less than 16 h after the
extrusion or cross-linking, if any, of the
insulating or sheathing compounds.
3.2 Test temperature
Unless otherwise specified, tests shall be made at an ambient
temperature of (20 15) C.
3.3 Test voltage
Unless otherwise specified in the individual clause of this
European Standard or in the product
standard, the test voltage shall be a.c. of approximately
sine-wave form and of frequency between
49 Hz and 61 Hz. The ratio of peak value to r.m.s. value shall
be equal to 2 with a tolerance of 7 %.
The values quoted are r.m.s. values.
3.4 Test values
Full test conditions (such as temperatures, durations, etc.) and
full test requirements are not specified
in this European Standard; it is intended that they should be
specified by the standard dealing with the
relevant type of cable.
Any test requirements which are given in this European Standard
may be modified by the relevant
cable standard to suit the needs of a particular type of
cable.
4 Definitions
For the purposes of this document, the following terms and
definitions apply.
4.1
median value
when several test results have been obtained and ordered in an
increasing or decreasing succession,
the median value is the middle value if the number of available
values is odd, and is the mean of the
two middle values if the number is even
5 Electrical d.c. resistance of conductor
The test shall be carried out in accordance with Annex A of EN
60228.
6 Voltage test on completed cable
If the cable has no metallic layer, a sample of the cable as
manufactured shall be immersed in water.
The length of the sample, the temperature of the water and the
period of immersion shall be as
specified in the cable standard. A voltage shall be applied
between conductor(s) and groups of
conductors in such a way that the insulation on each core is
tested against all adjacent cores and the
water.
BS EN 50395:2005+A1:2011 EN 50395:2005+A1:2011 (E)
Copyright British Standards Institution Provided by IHS under
license with BSI - Uncontrolled Copy
Not for ResaleNo reproduction or networking permitted without
license from IHS
--`,,```,,,,````-`-`,,`,,`,`,,`---
-
7
If the cable has a metallic layer, a sample of the cable shall
be taken of the length specified in the
cable standard. A voltage shall be applied between conductor(s)
and groups of conductors in such a
way that the insulation on each core is tested against all
adjacent cores and the metallic layer, which
shall be earthed.
If the cable has a metallic strain-bearing member, this shall be
connected to the water or to the
metallic layer, as appropriate.
In each case, the voltage and the duration of its application
shall be as specified in the cable standard.
The voltage shall be increased gradually on each occasion to the
specified value.
No breakdown of the insulation shall occur during the test.
7 Voltage test on cores in water
The test applies to sheathed cables, braided cables and flat
unsheathed cords.
NOTE For 1-core unsheathed cables, the test in Clause 6
generally applies, in which case this test on cores is not
required.
7.1 Test sample
Prepare a sample of cable 5 m long, by carefully removing,
without damaging the cores, the sheath or
the overall braid and any other covering or filling from a
length of completed cable.
In the case of flat unsheathed cord, make a cut in the
insulation between the cores, and separate the
cores by hand for a length of 2 m.
7.2 Procedure
Immerse the sample in water at the temperature, and for the
period, specified in the cable standard.
Ensure that the ends of the cores protrude above the water by a
distance sufficient to prevent
excessive surface leakage when the test voltage is applied.
Apply a voltage, of the magnitude
specified in the cable standard, between the conductors and the
water for the time specified in the
cable standard.
7.3 Requirement
No breakdown of the insulation shall occur during the test.
8 Insulation resistance test
8.1 Insulation resistance for cables having maximum conductor
temperatures not
exceeding 90 C
8.1.1 Test sample
Make the test on a sample of cable 5 m long, previously
submitted to the test specified in Clause 7 or,
in the case of 1-core unsheathed cable, to the test described in
Clause 6.
BS EN 50395:2005+A1:2011 EN 50395:2005+A1:2011 (E)
Copyright British Standards Institution Provided by IHS under
license with BSI - Uncontrolled Copy
Not for ResaleNo reproduction or networking permitted without
license from IHS
--`,,```,,,,````-`-`,,`,,`,`,,`---
-
8
8.1.2 Procedure
Immerse the sample in water previously heated to the temperature
specified in the cable standard,
with a length of about 250 mm at each end of the sample
projecting above the water, for the period of
time specified in the cable standard.
Apply a d.c. voltage of between 80 V and 500 V between each
conductor and the water.
Measure the insulation resistance of each core 1 min after
application of the voltage. Use this value to
calculate the insulation resistance of a 1 km length of each
core.
8.1.3 Requirement
None of the resulting values shall be below the minimum
insulation resistance value specified in the
cable standard.
8.2 Insulation resistance for cables with maximum conductor
temperatures
exceeding 90 C
NOTE Further basic information on this test method may be
obtained from HD 429, Clause 6 Test pieces for the volume
resistivity measurement.
8.2.1 Test sample
Make the test on the same sample of cable used for the voltage
test in Clause 7 or, in the case of
1-core unsheathed cable, to the test described in Clause 6.
8.2.2 Procedure
Cut a test piece 1,40 m long from the cable or core to be
tested. Cover this test piece with a semi-
conducting layer, and over this layer apply a metal braid or a
metal tape in such a way as to obtain an
active measuring length of 1,0 m.
At both ends of the active measuring length, leaving a gap 1 mm
wide, apply a protective wire binding
of approximately 5 mm length (see Figure 1).
Wind the test piece to form a ring with a diameter of
approximately 15D but at least 0,20 m
(D = nominal outer diameter of insulation).
Maintain the test piece in an air oven for at least 2 h at the
test temperature specified in the relevant
cable standard, leaving a clearance between the sample and the
walls of the air oven of at least
50 mm.
After the conditioning period a d.c. voltage between 80 V and
500 V shall be applied between the
conductor and the screen (semi-conducting layer and metal
braid/metal tape including the protective
wire binding), the sample still being kept in the air oven.
The insulation resistance shall be measured 1 min after
application of the voltage and this value shall
be used to calculate the insulation resistance of a 1 km length
of cable.
8.2.3 Requirement
None of the resulting values shall be below the minimum
insulation resistance value specified in the
cable standard.
NOTE Annex A shows the calculation method for minimum insulation
resistance.
BS EN 50395:2005+A1:2011 EN 50395:2005+A1:2011 (E)
Copyright British Standards Institution Provided by IHS under
license with BSI - Uncontrolled Copy
Not for ResaleNo reproduction or networking permitted without
license from IHS
--`,,```,,,,````-`-`,,`,,`,`,,`---
-
9
Key
1 guard electrode (protective wire binding) 2 screen
electrode
Figure 1 Positioning of electrodes
9 Long term resistance of insulation to d.c.
9.1 Test sample
Carry out the test on a sample of cable of 5 m length from which
all coverings have been removed.
The cores of flat unsheathed cords shall not be separated.
For cables having up to five cores, each core shall be tested.
For multicore cables having more than
five cores, one core of each colour in the cable shall be
tested, and where the number of colours is
less than 5, duplicate coloured cores shall be tested as
necessary to bring the number of cores tested
up to a minimum of 5.
Take care to avoid damage to the core(s) during removal of the
coverings.
9.2 Procedure
Immerse the sample, for the period and at the temperature given
in the relevant cable standard, in an
aqueous solution of sodium chloride having a concentration of 10
g/l, with a length of about 250 mm at
each end of the sample projecting above the solution. Connect
the negative pole of a 220 V d.c.
supply to the conductor(s) of the sample and the positive pole
to a copper electrode immersed in the
solution for the time given in the relevant cable standard.
BS EN 50395:2005+A1:2011 EN 50395:2005+A1:2011 (E)
Copyright British Standards Institution Provided by IHS under
license with BSI - Uncontrolled Copy
Not for ResaleNo reproduction or networking permitted without
license from IHS
--`,,```,,,,````-`-`,,`,,`,`,,`---
-
10
9.3 Requirement
No breakdown of the insulation shall occur during the test and,
after the test, the exterior of the
insulation shall show no sign of damage.
NOTE Discoloration of the insulation should be ignored.
10 Check for the absence of faults in insulation
10.1 General
Test all cable that is in the final stage of manufacture,
whether it is in delivery lengths or in
manufacturing lengths prior to being cut into delivery
lengths.
Test single core cables, whether sheathed or unsheathed, by the
spark test in accordance with 10.2.
Test all other cables, including sheathed flat cables, by the
voltage test in accordance with 10.3.
The requirements of 3.1 of this European Standard do not apply
when the check for absence of faults
is carried out as a Routine (R) test.
10.2 Spark test
10.2.1 Procedure
Carry out the test according to , except that the option to use
a pulsed
waveform high
voltage source is not permitted.
10.2.2 Requirement
No faults shall be detected during the test.
10.3 Voltage test
10.3.1 Procedure
With the cable in the dry state and at ambient temperature apply
a voltage of the magnitude given in
the relevant cable standard, supplied either from an a.c. source
or from a d.c. source, between each
conductor and all the other conductors and, if any, the metallic
layer connected to earth.
Increase the voltage gradually and maintain it at the full value
for the duration given in the relevant
cable standard.
10.3.2 Requirement
No breakdown of the insulation shall occur during the test.
EN 62230! "
BS EN 50395:2005+A1:2011 EN 50395:2005+A1:2011 (E)
Copyright British Standards Institution Provided by IHS under
license with BSI - Uncontrolled Copy
Not for ResaleNo reproduction or networking permitted without
license from IHS
--`,,```,,,,````-`-`,,`,,`,`,,`---
-
11
11 Surface resistance of sheath
11.1 Test samples
Carry out the test on three samples of completed cable, each
about 250 mm in length.
11.2 Procedure
Clean the sheath of each of the samples with industrial
methylated spirit, and apply to each sample
two electrodes, consisting of wire helices of copper wire of
between 0,2 mm and 0,6 mm diameter, at a
distance of (100 2) mm from each other. After the wire has been
applied, clean the surface of the
sheath again thoroughly between the electrodes.
Condition the samples with electrodes attached in a conditioning
chamber at a temperature of
(20 2) C and a relative humidity of (65 5) % for 24 h.
Immediately after removal from the conditioning chamber, apply a
d.c. voltage of between 100 V and
500 V between the electrodes, and measure the resistance after 1
min.
Multiply the measured resistance of each sample, in ohms, by
a/100, where a is the circumference of
the sheath of the sample, in millimetres. Record the median of
the three values so obtained as the
surface resistance of the sheath.
11.3 Requirement
The median of the three values so obtained shall be not lower
than the value in the cable standard.
12 Transfer impedance
The test shall be carried out in accordance with EN 50289-1-6,
clause 6.
NOTE EN 50289-1-6 is maintained by the Technical Committee
CENELEC TC 46X, Communication cables.
BS EN 50395:2005+A1:2011 EN 50395:2005+A1:2011 (E)
Copyright British Standards Institution Provided by IHS under
license with BSI - Uncontrolled Copy
Not for ResaleNo reproduction or networking permitted without
license from IHS
--`,,```,,,,````-`-`,,`,,`,`,,`---
-
12
Annex A
(informative)
Calculation of minimum insulation resistance
A.1 Basic formula
The general basic formula is:
=
d
D
R log.10..0367,0
8
where:
R = insulation resistance in M.km
= volume resistivity in .m
d = the diameter of the bare conductor as given in EN 60719
Table 1 (class 1 and class 2
conductors) or Table 2 (class 5 and class 6 conductors)
D = d + twice the specified mean value of the thickness of the
insulation and any
mandatory separator between conductor and insulation.
A.2 Rounding
As the requirement in cable standards is for a minimum value the
calculated value of R should be
rounded down to two significant figures.
A.3 Examples of calculation
HD 21.3 S3, Table 1, H07V-R
Conductor
cross-
section
Insulation
thickness
Conductor
diameter
(d)
Overall
diameter
R
R (rounded)
mm mm mm mm
M.km M.km
1,5
35
50
0,7
1,2
1,4
1,45
7,0
8,2
2,85
9,4
11,0
0,010 77
0,004 699
0,004 682
0,010
0,004 6
0,004 6
NOTE For many common insulation compounds, for instance those
based on PVC or on thermoplastic polyolefines, the volume
resistivity at the operating temperature of the relevant cable
is assumed to be 810 m+ . In these cases the general formula
reduces to:
kmM log0,0367 =
dDR
!
"
BS EN 50395:2005+A1:2011 EN 50395:2005+A1:2011 (E)
Copyright British Standards Institution Provided by IHS under
license with BSI - Uncontrolled Copy
Not for ResaleNo reproduction or networking permitted without
license from IHS
--`,,```,,,,````-`-`,,`,,`,`,,`---
-
13
Annex B
(informative)
Source of electrical test methods in EN 50395
Source (subclause number)Test
HD 21.2 S3 HD 22.2 S3
Clause in EN 50395
Electrical resistance
of conductor
2.1 2.1 5
Voltage test on
completed cable
2.2 2.2 6
Voltage test on cores 2.3 2.3 7
Insulation resistance 2.4 2.4 8
Long term resistance
of insulation to d.c.
2.5 2.5 9
Test to check
absence of faults on
insulation
2.6 2.6 10
Transfer impedance
(Screening efficiency)
2.7 - 12
Surface resistance of
sheath
2.8 2.7 11
BS EN 50395:2005+A1:2011 EN 50395:2005+A1:2011 (E)
Copyright British Standards Institution Provided by IHS under
license with BSI - Uncontrolled Copy
Not for ResaleNo reproduction or networking permitted without
license from IHS
--`,,```,,,,````-`-`,,`,,`,`,,`---
-
14
Bibliography
The following documents are referred to in the text for
information.
HD 21.2 S3:1997 Cables of rated voltages up to and including
450/750 V and having
thermoplastic insulation - Part 2: Test methods
HD 22.2 S3:1997 Cables of rated voltages up to and including
450/750 V and having cross-
linked insulation - Part 2: Test methods
HD 429 Methods of test for volume resistivity and surface
resistivity of solid electrical
insulating materials (IEC 60093)
HD 605 Electric cables - Additional test methods
EN 50289 Series Communication cables - Specifications for test
methods
BS EN 50395:2005+A1:2011 EN 50395:2005+A1:2011 (E)
Copyright British Standards Institution Provided by IHS under
license with BSI - Uncontrolled Copy
Not for ResaleNo reproduction or networking permitted without
license from IHS
--`,,```,,,,````-`-`,,`,,`,`,,`---
-
BSI GroupHeadquarters 389 Chiswick High Road, London, W4 4AL, UK
Tel +44 (0)20 8996 9001 Fax +44 (0)20 8996 7001 www.bsigroup.com/
standards
BSI - British Standards InstitutionBSI is the independent
national body responsible for preparing British Standards. It
presents the UK view on standards in Europe and at the
international level. It is incorporated by Royal Charter.
Revisions
British Standards are updated by amendment or revision. Users of
British Standards should make sure that they possess the latest
amendments or editions.
It is the constant aim of BSI to improve the quality of our
products and services. We would be grateful if anyone finding an
inaccuracy or ambiguity while using this British Standard would
inform the Secretary of the technical committee responsible, the
identity of which can be found on the inside front cover. Tel: +44
(0)20 8996 9000. Fax: +44 (0)20 8996 7400.
BSI offers members an individual updating service called PLUS
which ensures that subscribers automatically receive the latest
editions of standards.
Buying standards
Orders for all BSI, international and foreign standards
publications should be addressed to Customer Services. Tel: +44
(0)20 8996 9001. Fax: +44 (0)20 8996 7001 Email:
[email protected] You may also buy directly using a debit/credit
card from the BSI Shop on the Website
http://www.bsigroup.com/shop
In response to orders for international standards, it is BSI
policy to supply the BSI implementation of those that have been
published as British Standards, unless otherwise requested.
Information on standards
BSI provides a wide range of information on national, European
and international standards through its Library and its Technical
Help to Exporters Service. Various BSI electronic information
services are also available which give details on all its products
and services. Contact Information Centre. Tel: +44 (0)20 8996 7111
Fax: +44 (0)20 8996 7048 Email: [email protected]
Subscribing members of BSI are kept up to date with standards
developments and receive substantial discounts on the purchase
price of standards. For details of these and other benefits contact
Membership Administration. Tel: +44 (0)20 8996 7002 Fax: +44 (0)20
8996 7001 Email: [email protected]
Information regarding online access to British Standards via
British Standards Online can be found at
http://www.bsigroup.com/BSOL
Further information about BSI is available on the BSI website at
http:// www.bsigroup.com
Copyright
Copyright subsists in all BSI publications. BSI also holds the
copyright, in the UK, of the publications of the international
standardization bodies. Except as permitted under the Copyright,
Designs and Patents Act 1988 no extract may be reproduced, stored
in a retrieval system or transmitted in any form or by any means
electronic, photocopying, recording or otherwise without prior
written permission from BSI.
This does not preclude the free use, in the course of
implementing the standard, of necessary details such as symbols,
and size, type or grade designations. If these details are to be
used for any other purpose than implementation then the prior
written permission of BSI must be obtained.
Details and advice can be obtained from the Copyright and
Licensing Manager. Tel: +44 (0)20 8996 7070 Email:
[email protected]
BS EN
50395:2005
+ A1 :201 1
Copyright British Standards Institution Provided by IHS under
license with BSI - Uncontrolled Copy
Not for ResaleNo reproduction or networking permitted without
license from IHS
--`,,```,,,,````-`-`,,`,,`,`,,`---