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1、J IS JAPANESE I NDUSTRIAL STANDARD Translated and Published by Japanese Standards Association Fittings for pliable plastics conduits ICs 29.120.10 Descriptors : electric conduits, electric wires, electric wiring systems, plastics, flexible Reference number : JIS C 8412 : 1999 (E) tubing, electric co
2、nnectors, fitting 8s Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:57:56 MDTNo reproduction or networking permitted without license from IHS -,-,- 1 C 8412 : 1999 Foreword This transla
3、tion has been made based on the original Japanese Industrial Standard revised by the Minister of International Trade and Industry through deliberations at the Japanese Industrial Standards Committee in accordance with the Industrial Standardization Law. Consequently JIS C 8412 : 1992 is replaced wit
4、h JIS C 8412 : 1999. Date of Establishment: 1987-01-01 Date of Revision: 1999-04-20 Date of Public Notice in Official Gazette: 1999-04-20 Investigated by: Japanese Industrial Standards Committee Divisional Council on Electricity JIS C 8412 : 1999, First English edition published in 2001-07 Translate
5、d and published by: Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN In the event of any doubts arising as to the contents, the original JIS is to be the final authority. O JSA2001 All rights reserved. Unless otherwise specified, no part of this publication may be rep
6、roduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Printed in Japan Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=W
7、ing, Bernie Not for Resale, 03/14/2007 03:57:56 MDTNo reproduction or networking permitted without license from IHS -,-,- JAPANESE INDUSTRIAL STANDARD JIS C 8412 : 1999 Fittings for pliable plastics conduits 1 Scope This Japanese Industrial Standard specifies couplings, connectors and combination co
8、uplings (hereafter referred to as “fittings”) to be used for the pliable plastics conduits (hereafter referred to as “PF conduits”, “CD conduits” and “pliable conduits” generically). 6 2 Normative references The following standards contain provisions which, through reference in this Standard, consti
9、tute provisions of this Standard. The most recent editions of the standards indicated below shall be applied. JIS C 0072 Fire hazard testing-Part 2 : Test methods-Section 1 f sheet O : Glow- wire test methods-General IEC 60695-2-1 Fire hazard testing-Part 2 : Test methods-Section 1 1 sheet O : Glow-
10、wire test and guidance is identical with the said stan- dard. JIS C 0920 Tests to prove protection against ingress of water and degrees of pro- tection against ingress of solid objects for electrical equipment JIS C 8305 Rigid steel conduits JIS C 8430 Unplasticized polyvinyl chloride (PVC- U) condu
11、its Remarks : 3 Definitions For the purpose of this Standard the following principal definitions apply: a) coupling A connecting fitting which connects pliable conduits of the same type to each other. b) connector A connecting fitting which connects a pliable conduit to a box or the like. c) combina
12、tion coupling A connecting fitting which connects a pliable conduit to a conduit of other type. non-flame propagating fitting A fitting which is liable to catch fire as a result of applied flame, in which the flame does not propagate, and which ex- tinguishes itself within a limited time after the f
13、lame is removed. d) 4 Classification 4.1 Table 1. Classification of fittings The classification of fittings shall be as stated in Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:57:56 MD
14、TNo reproduction or networking permitted without license from IHS -,-,- 2 C 8412 : 1999 Classification Coupling Table 1 Classification of fittings Applicable conduits Informative figure PF conduit, CD conduit 1 Connector Combination coupling PF conduit, CD conduit 2 PF conduit, CD conduit, VE condui
15、t ( l ) , rigid steel conduit (2) 3 4.2 Classification according to temperature The classification according to temperature shall be as stated in Table 2. Type-5 Type-25 Table 2 Classification according to temperature Unit: “C -5 -5 -5 to +60 -25 -15 -15 to +60 Temperature Lowest temperature in Lowe
16、st temperature in Service temperature I classification I storage and transport installation and service range 4.3 Classification according to resistance to burning The classification ac- cording to resistance to burning shall be as follows: a) non-flame propagating fitting (self-extinguishable one):
17、 fittings for PF conduit b) flame propagating fittings (non-self-extinguishable one): fittings for CD con- duit 5 Performances The performances of fittings shall comply with Table 3, when the tests are carried out in accordance with 8. However the test for resistance to burning (self-extinguishable
18、property) is not applicable to fittings for CD conduits. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:57:56 MDTNo reproduction or networking permitted without license from IHS -,-,- 3
19、 C 8412 : 1999 Item Performance Resistance to shock Nine or more samples out of 12 samples shall not show evidence of decomposition, cracks or fissures found out by visual check, nor deformation detrimental to normal service. Table 3 Performances Applicable subclause for test 8 . 1 fitting shall sta
20、y as previously assembled with the conduits and show no cracks or fissures found out by visual check. Tensile strength 8.2 Burning resistance (self-extinguishable property) The flame shall go off within 30 s after removal of the glow wire. 8 . 3 Dielectric strength The tripping device shall not oper
21、ate during the test for 15 min. 6 Construction The construction of fittings shall comply with the following re- quirement s: Insulation resistance External influences a b) The insulation resistance shall be 5 MC2 or more. The fitting shall have a resistance of IP30 or better. 8.5 8.6 d) The fitting
22、shall be free from sharp edges and/or burrs which may damage the insulated conductors or cables or injure the installer or user on its inside sur- face, and from any projection on its surface. If threaded components are used for attaching the parts constituting the fitting or the cover, or for conne
23、cting and fixing the conduits, the threaded components shall not cause damage of the insulation of cable when they are correctly at- tached. The fixing means by thread shall be so designed that they can withstand the mechanical stress which will occur during the installation and/or normal ser- vice.
24、 For threaded components which mate with the internal threads provided on non- metallic material and the threaded components of non-metallic material, operations each consisting of tightening and loosening the mating shall be carried out 10 times. In other cases, the operations shall be carried out
25、5 times. The test shall be carried out by applying the torque specified in Table 4 using a corresponding screwdriver or spanner. The threaded components shall not be tightened quickly or violently. After the test, there shall be no trouble to reuse the thread, nor damage on the head and thread. The
26、materials used for the joints, e.g. rubber and fiber, which may be exposed to the external influence when they are assembled in accordance with the in- struction manual of the manufacturer shall have at least the resistance to the external influence of the same level as that of the conduits or the f
27、ittings. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:57:56 MDTNo reproduction or networking permitted without license from IHS -,-,- 4 C 8412 : 1999 Nominal diameter of thread (mm) O
28、ver up to - 2 . 8 2 . 8 3 . 0 3.0 3.2 0 h) As for the connection of the conduits and the fittings assembled by other means Torque (Nm) I(3) 1 1 (4) 0.4 0.4 0.5 0.5 O. 6 0.6 than threads, the manufacturer shall show whether the disassembling of the connection is possible or not, and further the metho
29、d for disassembling, if pos- sible. 3 . 6 Table 4 Torque for thread test 4.1 1 . 2 1 . 2 4.7 5.3 5.3 2.0 2 . 0 6.0 2 . 5 3 . 0 8.0 I 1 . 8 I 1 . 8 I 4.7 I 4.1 I 10.0 4.0 10.0 t I I I 6.0 I 8.0 I 3 . 5 I 6.0 I 7 Shapes and dimensions The shapes and dimensions of fittings shall be as stated in Tables
30、5, 6 and 7. The shapes are given for informative reference. 0 Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:57:56 MDTNo reproduction or networking permitted without license from IHS -,
31、-,- 5 C 8412 : 1999 d t (Minimum (Minimum value) value) Table 5 Coupling Unit: mm a 1 For PF conduit 3 For CD conduit 3 (Minimum value) Nominal size 54.6 62.4 14 16 50.4 57.6 22 1 28 36 - 1 - - 9 42 i 20.9 26.7 I 1.8 I 1.5 1 25.8 22.8 43.8 40.8 Copyright Japanese Standards Association Provided by IH
32、S under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:57:56 MDTNo reproduction or networking permitted without license from IHS -,-,- 6 C 8412 : 1999 (Minimum value) Table 6 Connector Unit: mm I For PF For CD For PF For CD conduit f 4 conduit f 4
33、conduit $ conduit $ (Minimum value) Nominal size 13.2 14 1.0 45.8 42.8 25.8 22.8 16 15.2 20.9 26.7 22 47.6 45.2 27.6 25.2 56.6 53.0 36.6 33.0 1.8 68.8 65.8 43.8 40.8 28 36 42 Dimensions of each part 33.4 2.2 79.6 75.4 54.6 50.4 38.2 2.2 92.4 87.6 62.4 57.6 L 1 I _( I I I Fig. 2 Connector Copyright J
34、apanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:57:56 MDTNo reproduction or networking permitted without license from IHS -,-,- 7 C 8412 : 1999 - Dimensions li 12 of each part Base conduit PF CD PF
35、 CD conduit conduit conduit conduit Table 7 Combination coupling d t (Mini- (Mini- mum mum value) value) Unit: mm - 22 28 36 42 36.60 33.0+; 35+; 20min. 33.0; 350 43.8+; 40.8+; 40+; 40.8: 400 54.6+; 50.4+; 443 25 min. 50.4; 44+: 62.4+; 57.6; 55+; 57.60 55+; Conduit to be PF CD VE Steel CD VE connect
36、ed I conduit 0 I conduit 0 I conduit +; 1 conduit 1 conduit +o 1 conduit 0 Nominal 1 1: I 25.8, 1 22.8+: 1 25+: 118min. I 22.8: 1 25+; size 27.6+4 25.2+4 30+4 25.2+; 300 Steel conduit 15.2 20 min. I 20.9 I * 38.2 a (Mini. mum value - 1.5 - Fig. 3 Combination coupling 8 Tests General requirements for
37、 the tests are as follows: a) The tests specified in this Standard are type tests. 0 b) Unless otherwise specified, the tests shall be carried out at an ambient tem- perature of 23 O C k 2 OC. c) Unless otherwise specified, each test shall be carried out on 3 new samples. Remarks : In some tests, e.
38、g. dimensional check, the characteristics of samples do not change, therefore such samples may be used for the tests to be carried out thereafter, being considered as new samples. d) The samples shall be subjected to pre-conditioning at a temperature of 23 O C k 2 O C and a relative humidity of 40 %
39、 to 60 % for at least 240 h. All the tests shall be carried out immediately after the pre-conditioning. Unless otherwise specified, the samples for each test shall be free from dirt and be under new state. All the components for tests shall be arranged at the pre- scribed positions, and the samples
40、shall be mounted as in its normal service. e) Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:57:56 MDTNo reproduction or networking permitted without license from IHS -,-,- ,8 C 8412 :
41、1999 ) If the part of a fitting is capable of attaching and detaching the conduit, the fitting shall be capable of being reassembled, after the test, according to the instruction manual of the manufacturer, without losing the initial characteris- tics. g) Unless otherwise specified, 3 samples shall
42、be submitted to a test and if they pass the test, the requirement is considered as satisfied. If only one sample fails a test due to a defect caused by manufacturing, the test and the previ- ously carried-out test(s) possible to affect the said test result shall be carried out again, and the subsequ
43、ent tests shall be made in the necessary sequence by using separate perfect samples, and such samples shall comply with the require- ments. Remarks : When samples for additional tests are not submitted at the same time with the submission of the first test samples, if one sample fails the test, the
44、whole lot is rejected. The applicant can submit additional test samples at the time of submitting the first test samples as the provision against the failure of one sample among the said samples. In such a case the tester shall carry out the tests on the additional test samples without requiring new
45、 test samples, and reject the lot only when further failure appears. h) If poisonous and/or hazardous environment may be produced, necessary precaution for safety of the persons in the testing area shall be provided. 8.1 test samples by means of the test apparatus specified in Fig. 4. Shock resistan
46、ce test The shock resistance test shall be carried out on 12 a) Before the test, assemble the sample with the components including the con- duits which are necessary for the test so that they are in the normal service state. This test is not applicable to the component which will not receive im- pac
47、t when it is mounted as in normal service state and the small sized fitting with a maximum dimension less than 20 mm. b) Place the test apparatus on a shock absorber having a thickness of 40 mm -t- 1 mm and a density of 538 kg/m3i 22 kglm3 before compression. c) Place the samples together with the t
48、est apparatus in a freezer. Maintain the temperature at -5 “C I 2 “C (-25 “C -I- 2 OC, for type-25). When the samples have attained the temperature or after 2 h, whichever is the longer period, place each sample on the steel base of the test apparatus and allow a hammer to fall once. The mass of the hammer shall be 2.0:.02 kg and the fall height shall be 100 mm 1 mm. Carry out the test on the weakest point of the fitting, but do not apply the impact within 5 mm from the port for