IS 14927-2: Cable Trunking and Ducting Systems for Electrical Installations, Part 2: Cable Trunking and Ducting Systems Intended for Mounting on Walls or Ceiling

11 Pages·2001·1.2 MB·English

by  Bureau of Indian Standards

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IS 14927-2 (2001): Cable Trunking and Ducting Systems for
Electrical Installations, Part 2: Cable Trunking and
Ducting Systems Intended for Mounting on Walls or Ceiling
[ETD 14: Electrical Wiring Accessories]
“!ान $ एक न’ भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee””
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै”
Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”

f
IS 14927 (Part 2): 2001

Indian Standard
CABLE TRUNKING AND DUCTING SYSTEMS
FOR ELECTRICAL INSTALLATIONS
PART 2 CABLE TRUNKING AND DUCTING SYSTEMS INTENDED FOR
MOUNTING ON WALLS OR CEILINGS
ICS 29.120.10

0 BIS 2001
BUREAU OF IN’D IAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002

May 2001 Price Group 3
Electrical Wiring Accessories Sectional Committee, ET 14
FOREWORD
This Indian Standard (Part 2) was adopted by the Bureau of Indian Standards, afier the draft finalized by the
Wiring Accessories Sectional Committee had been approved by the Electrotechnical Division Council.
/
This standard covers the requirements ofcable trunking and ducthg systems commonly known ascable casing
and taping intended for mounting on walls or ceilings.
The cable trunking and ducting systems isusedto accommodate and where necessary, segregate the conductors,
cables or cords.
This standard isto be read in conjunction with Part 1ofthis standard which covers the general requirements of
cable trunking and ducting. Clauses which are applicable (which means that the relevant provisions of that
clause apply) ornot applicable andthenecessary changes, wherever required, areindicated accordingly. Clauses
which are additional to those of Part 1are numbered starting from 101; additional table is numbered 101 and
additional Annex is lettered AA. Should, however, any deviation exists between Part 1and this standard, the
provision of later shall apply.
This standard isbased on IEC 61084-2-1(1 996) ‘Cabletrunking and ducting systems for electrical installations:
Part 2Particular requirements, Section 1Cable trunking and ducting system intended to mounting on walls and
ceilings’ issued by the International Electrotechcnical Commission (IEC).
It is intended to bring out other parts of the standard on cable trunking and ducting systems for other areas of
application, for example, for installation on poles and installation in cabinet at alater date depending upon the
need of the manufacturer and users.
For the purpose of deciding whether aparticular requirement ofthis standard is complied with, the final value,
observed or calculated, expressing the result of a test, shall be rounded off in accordance with IS 2:1960
‘Rules for rounding of numerical values (revise@ the number of significant places retained inthe rounded off
value should be the same asthat of the specified value in this standard.
~’,
IS 14927 (Part 2) :2001
.:
Indian Standard
CABLE TRUNKING AND DUCTING SYSTEMS .
-1
“$
FOR ELECTRICAL INSTALLATIONS
PART 2 CABLE TRUNKING AND DUCTING SYSTEMS INTENDED FOR
MOUNTING ON WALLS OR CEILINGS
1SCOPE 4.101 Themanufacturer shall give instruction onhow
to install the system to ensure compliance with the
This standard (Part 2) specifies requirements forcable
standard. TheInstructions shallgivethe classification
trunking and ducting systems intended for mounting
oftheCT/DS according to6. Ifthe,system isintended
on walls or ceilings. The cable trunking and ducting
for the suspension of loads, the manufacturers
systemsaccommodate and,wherenecessary, segregate
instructions shall include information on the
conductors, cables or cords and other electrical
maximum load and method of suspension.
equipment. The systems are intended to be mounted
directly on walls or ceilings, flush or semiflush or 5 GENERAL CONDITIONS FOR TESTS
indirectly on walls or ceilings, or on structures away
This clause of Part 1is applicable except as follows:
from on walls or ceilings.
Additional subclause:
Cable trunking and ducting system are hereinafter
called CT/DS. 5.101 The tests of the various clauses are carried out
on the samples as specified in Table 101.
This standards does not apply to conduits, cable trays
or cable ladders, electrical accessories, for example,
Table 101 Samples Required
switches, socket-outlets orthe like,forwhich separate
Indian Standards apply, or current carrying parts
Setof Description ClauseRefto
within the system.
Sample IS14927(Part1)
The different types of the systems are shown in A OnelengthofCT/DSandoneofeach 7, 9.1,9.3,9.5
figure 101 and described in Annex A. CT/DSfittings
B Three250-rnrnlengthsofCT/DS 9.3.1, 9.3.2
2 REFERENCES c 2mofCT/DSmountedwithcables 9.4
andelectricalaccessories
Thefollowing Indian Standards arenecessary adjuncts
D Threemembranesassembledinthe 9.6.3, 9.6.4
to this standard:
s-

1SNo. Title E Tbreeglandsassembledinthesystem 9.7.2

11000 (Part 2/ Fire hazard testi ng: Part 2 Test F Threecomponentswithcable 9.101
anchorage
Sec 1): 1984 methods, Section 1 Glow wire test
G Sixlengthsof2mofCT/DSwith 10.2.3,10.2.4
and guidance
cover
14927 (Part 1): Cable trunking and ducting systems
H Sixlengthsof250-mmoftrunking 10.2.5,10.2.6
2001 for electrical installations: Part 1 orductinglengthswithcover
General requirements J Threelengthsof250-mmoftrunking 10.3.3
orductinglengthswithcover
3 TERMINOLOGY
K Threelengthsof250-mmofCT/DS 10.3.101
withcover
This clause of Part 1is applicable except asfollows:
L Onelengthof250-mmofCT/DS 10.5.101
Additional Sub-clause: withApparatusmountingdevice
M Onelengthof250-mmofCT/DS 10.6.2
3.101 Cable Anchorage withcover
N Threelengthsof600-mmofCT/DS 11,12
A device intended to relieve strain on conductors
withcoverandfittings
especially atterminals orterminations ortoprevent a
cable from becoming detached from anenclosure.
6CLASSIFICATION
4 GENERAL REQUIREMENTS This clause of Part 1isapplicable except asfollows:
This clause of Part 1isapplicable except asfollows: 6.4.1 Addition:
Additional subclause: The use of flame propagating CT/DS isnot allowed.

1
IS 14927 (Part 2) :2001
6.6.2 AdditionalClasstj?cations: The test is then repeated with the cable anchorage
fitted with a cable with the greatest outside diameter
6.6.2.101 CT/DS giving protection against powerful
for which it is intended.
water jets (IP x 6).
After each test, the cable shall not have moved more
6.6.2.102 CT/DS giving protection againsttheeffects
than 3mm inthe cable anchorage and the sheaths of
of temporary immersion inwater (IP x 7).
the cables shall show no signs of abrasion.
6.6.2.103 CT/DS giving protection againsttheeffects
9.4.1 Add the following sentence:
of continuous immersion in water (IP x 8).
The test ismade afier the removal of all parts, which
7 MARKING can be removed without the aid of atool.
This clause of Part 1isapplicable except asfollows:
10MECHANICAL PROPERTIES
7.1Add the following attheendofthefirstparagraph:
This clause of Part 1isapplicable except as follows:
“except that thenumber ofthe specificationmay, asan
10.3Impact Test
alternative,begiven inthemanufacturer’s instructions.”
10.3.1 Add the following sentence:
Additional subclause:
No blow shall be applied within 50 mm of the ends,
7.101 CT/DS shall bemarked with thetype reference,
orto knockouts
which may be acatalogue number.
Additional subclause:
7.102 BIS Standard Mark
10.3.3.101 Trunking and ducting systems shall
The CT/DS may also be marked with the Standard
withstand impacts likely to occur under classified
Mark.
installations and permanent application temperature.
7.102.1 The use of standard mark isgoverned by the
Thetestiscarriedoutonthree sampleseach250 ~~mm
provisions oftheBureau ofIndian StandardrAct, 1986
long,
and the Rules and Regulations made thereunder. The
details of conditions under which the licence for the provided with fittings, if any. All the samples are
use ofstandard mark maybe granted tomanufacturers assembled and mounted as in normal use, according
or producers may be obtained from the Bureau of tothemanufacturers instructions, onapiece ofwooden
Indian Standards. fibreboard of 19mm thickness.
8 DIMENSIONS Thetestapparatus according toFig.2ofPart 1together
with the samples, is placed in a refrigerator, the
This clause of Part 1isapplicab l e. temperature ofwhich ismaintained atthe appropriate

value specified inPart 1,Table 1,CO13within +l“C.
9 CONSTRUCTION
After 2h, each sample isinturn placed in position in
This clause of Part 1isapplicable except asfollows:
the apparatus such that ablow can be applied fwstly
Additional subclause: tothecentreofalength,or cover, ifany,andsecondly
on each side facing, even if the impact is not at the
9.1.101 The cable anchorage, ifany, shall be suitable
centre point ofthehammer. No blow shallbe applied
for the different types of cables which maybe used.
within 50mm of the ends, or to knockouts.
The sheath of the cable shall be clamped within the
cable anchorage. A blow is applied on the front face of the fitting
mounted on each of the three samples under test.
Compliance is checked by inspection and by the
Impact locations areevenly scattered onthe front face
following test.
of the tested fitting.
The cable anchorage is fitted with a cable with the
Front face means a face logically exposed to blows
smallest outside diameter forwhich itisintended. The
when the fitting ismounted. The line separating two
screws, if any, are tightened with 2/3 of the torque
front faces ispart ofboth faces and maybe hit during
given in Part 1,Table 2.
the test.
The specimen is kept for 30 min at atemperature of
Thehammer isallowed tofallsothatanimpact energy
60 + 2°C with the specimen still at this temperature,
according to Part 1,Table 4 is applied. The mass of
anaxial force of 50N* 5‘Aisapplied tothe cable for
the hammer and the fail height shall be as specified
60*5s.
in Part 1,Table 4.

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IS 14927 (Part 2) :2001
10.3.4 Add a second paragraph: be included, ifnecessary, to prevent the movement of
the apparatus mounting device during the test.
Neither the cover nor the fittings shall be ejected,
accept that this does not apply to knockouts. A force of 100+5N isapplied tothe apparatus fixing
device ofthe apparatus mounting device for 60 + 5 s
10.4 Linear Deflection Test
in the most unfavorable direction within the angle
Replacement: of 45 to 90”C from the front surface.
For suspended CT/DS all system components shall During the test the apparatus mounting device shall
withstand the static stresses that can be expected in not become detached.
normal use when mounted according to the
Immediately afler this test, the apparatus mounting
manufacturer instructions.
deviceissubjectedtoatorque of3+0.2Nm, clockwise
Compliance is checked by the following test. and anticlockwise respectively.
(Test is under consideration) The duration of the test shall be 60 ~~s in each
direction.
10.5 External Load Test
During the test the apparatus mounting device shall
Additional subclause:
not turn more than 15° ftom its initial position.
10.5.101 Apparatus mounting devices shall be firmly
attached to the main part of the system. 11 RESISTANCE TO FLAME PROPAGATION
Compliance is checked by the following tests: This clause of Part 1is applicable.
If the results of the tests are dependent on the 12 ELECTRICAL CHARACTERISTICS
temperature, the tests are carried out at 40 * 2°C the
This clause of Part 1is applicable.
appropriate temperature specified in Part 1,Table 1,
Col3.
13EXTERNAL INFLUENCES
A sample of atrunking length of250 +5mm isfitted
This clause of Part 1is applicable.
with an apparatus mounting device according to the
manufacturer’s instructions. Other components may
b

3
IS 14927 (Part 2) :2001
ANNEX A
(Clause 1.1)
INFORMATION
A This Annex of Part 1isapplicable except as follows.
A-1 Types of trunking and ducting systems for wall or ceiling installation.
Replace- Defmition For Mounting
ment
No. in
Fig. 101
1 Trunking and Insulated conductors, cables, Surface on wall or ceiling, on
accessories cords, mounting devices for walls mounted horizontal or
7
apparatus vertical, ceiling suspended
11
12
13
5 Trunking and Insulated conductors, cables, Surface on wall or ceiling on
accessories cords, mounting devices for walls mounted horizontal or
apparatus vertical, ceiling suspended
2 Ducting and Insulated conductors, cables, Surface on wall or ceiling, on
accessories cords, mounting devices for walls mounted horizontal or
8
apparatus vertical, ceiling suspended
10
12
3 Trunking and Insulated conductors, cables, Flush in wall or ceiling, in walls
t
accessories cords, mounting devices for mounted horizontal or vertical
9
apparatus
6 Skirting, trunking Insulated conductors, cables, Surface onwall and ceiling
and accessories cords, mounting devices for
apparatus

A-2 Not applicable.
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