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GB/T 38280-2019: Cable management systems - Specifications for conduit fittings and accessories for cable installations for extra heavy-duty electrical steel conduit
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 38280-2019 | English | 1479 |
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Cable management systems - Specifications for conduit fittings and accessories for cable installations for extra heavy-duty electrical steel conduit
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GB/T 38280-2019
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Basic data | Standard ID | GB/T 38280-2019 (GB/T38280-2019) | | Description (Translated English) | Cable management systems - Specifications for conduit fittings and accessories for cable installations for extra heavy-duty electrical steel conduit | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K65 | | Classification of International Standard | 29.120.10 | | Word Count Estimation | 74,734 | | Date of Issue | 2019-12-10 | | Date of Implementation | 2020-07-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 38280-2019: Cable management systems - Specifications for conduit fittings and accessories for cable installations for extra heavy-duty electrical steel conduit
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Cable management systems-Specification for conduit fittings and accessories for super heavy duty rigid electrical conduit cable installations)
ICS 29.120.10
K65
National Standards of People's Republic of China
Cable management system super heavy duty rigid electrical conduit
Specification for conduit fittings and accessories for cable installations
(IEC 61950..2007, MOD)
2019-12-10 release
2020-07-01 implementation
State Administration of Market Supervision
Published by the National Standardization Management Committee
Contents
Foreword III
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 General requirements 4
5 Accessories for special wiring systems 7
6 Cast metal box and conduit body 12
7 Special types of cast metal boxes and catheter bodies 14
8 logo 16
9 Type test 18
Figure 1 Basic dimensions of lock nuts for super heavy duty rigid steel conduits 51
Figure 2 Basic dimensions of lock nuts for electrical accessories 52
Figure 3 Bend test for unthreaded fittings 53
Figure 4 Short-threaded conduit fittings for super heavy-duty rigid steel conduits on bushings or hubs, or other tapered or straight threads
Basic dimensions of internal straight pipe threads for electrical accessories (cut threads are only applicable to appliances in ordinary positions) 54
Figure 5 Conical Threaded Catheter Inlet Diameter 55
Figure 6 Gauge for measuring the flat area of the catheter inlet 56
Figure 7 Exterior of conduit fittings or other electrical fittings with tapered or straight internal threads for coupling of super heavy duty rigid steel conduits
Dimensions of straight pipe threads (cut threads are only suitable for appliances in ordinary positions) 57
Figure 8 FS and FD box configuration 58
Figure 9 Nodes, pulls, and catheter body openings 59
Figure 10 Short catheter body 60
Fig. 11 Rain tightness test nozzle 61
Figure 12 Rain test nozzle tube 62
Fig. 13 Flammability test device 63
Figure 14 Measurement of voltage drop of accessory 64
Figure 15 Fault current test with a case 64
Figure 16 Fault current test with a steel plate 65
Figure 17 Volume measurement, metal-clad box 65
Figure 18 Rated temperature test of insulating materials for bushings and insulating linings 66
Figure 19 Test setup for a non-metal-clad cable connector using a 5000V dielectric strength test 67
Figure 20 Oil mist test device 68
Figure 21 Reduced washer current and resistance test setup 69
Table 1 Wall thickness of accessories 37
Table 2 Zinc coating thickness 38
Table 3 Minimum thread length of the connection box 38
Table 4 Bending radius of elbow fittings 39
Table 5 Inner diameters of fittings and sleeves 39
Table 6 Tightening torque, load and pull-out force for threaded and non-threaded accessories 40
Table 7 Rain tight test nozzle 40
Table 8 Dimensions of demoulding and reducing washers 41
Table 9 Minimum wall thickness on threaded holes of catheters 41
Table 10 Minimum cross-sectional area of the catheter body 41
Table 11 Space in the catheter 42
Table 12 Minimum distance between centers of catheter bodies for three-wire installations
Table 13 Box markings 44
Table 14 Adjustable polymer temperature 44
Table 15 Test current and time 44
Table 16 Tightening torque value 45
Table 17 Thickness and diameter of locknuts and sleeves 45
Table 18 Reference test for thickness factor of zinc coating 46
Table 19 Simulated thickness of metal thickness of test materials used to verify mechanical installations 46
Table 20 Rally 46
Table 21 Tightening torques for metal-clad cable accessories with glands 47
Table 22 Bending radius of metal-clad cables 47
Table 23 Tightening torque 47
Table 24 Box temperature 48
Table 25 Test voltage 48
Table 26 Test procedures for expansion accessories 48
Table 27 Dimensions of zinc-coated ferrous metal conduits for assembly 49
Table 28 Test current and time 49
Table 29 Mandrel diameter 50
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard uses the redrafting method to modify and adopt IEC 61950..2007
Specification for catheter fittings and accessories for placement.
The technical differences between this standard and IEC 61950..2007 and their causes are as follows.
--- Regarding the normative reference documents, this standard has made adjustments with technical differences to suit China's technical conditions and the situation of adjustment.
The situation is reflected in Chapter 2 "Regulatory Reference Documents", and the specific adjustments are as follows.
● Replaced IEC 60695-11-3 with GB/T 5169.15-2015 equivalent to the international standard (see 9.4.6);
● Replaced ISO 4892-2..1994 with GB/T 16422.2-2014 equivalent to the international standard (see 9.2.2.7.2);
● Replaced IEC 60981..2004 with GB/T 17193 equivalent to the international standard (see Chapter 1, 6.3.3);
● ISO 5864..1993 was replaced by GB/T 20666 which adopted the international standard (see 4.6);
● Replaced ISO 68-2..1998 (see 4.6) with GB/T 20669 which adopted the international standard;
● ISO /263 (see 4.6) was replaced with GB/T 20670 which adopted the international standard;
● ISO 301. 1981 replaced by ISO 301..2006 (see 4.2.1.4).
--- "The hardness change should not exceed 5 digits" in 4.3.3 was revised to "the hardness change should not exceed 10 digits", corrected
The error on the "hardness change" figure in 4.3.3 of IEC 61950..2007 is consistent with the requirements of 9.9.
The following editorial changes have been made to this standard.
--- Figures and table numbers are adjusted in the order mentioned in the standard.
This standard was proposed by the China Electrical Equipment Industry Association.
This standard is under the jurisdiction of the National Electrical Equipment Standardization Technical Committee (SAC/TC67).
This standard was drafted. Jiaxing Weikai Testing Technology Co., Ltd., Zhongshan Changshun Hardware Products Co., Ltd., Hangzhou Hongyan Electric Co., Ltd
Company, Guangdong Yitong Technology Co., Ltd., Shenzhen Yinghe Technology Co., Ltd., Dongguan Yakang Precision Machinery Co., Ltd., China
Electric Appliance Research Institute Co., Ltd.
The main drafters of this standard. Jin Weibin, Li Dajian, Zhou Xiaoqing, Wu Weiguo, Wang Weidong, Xu Hongjun, Cai Jun, Zhang Yafei, Li Xiqin.
Cable management system super heavy duty rigid electrical conduit
Specification for conduit fittings and accessories for cable installations
1 Scope
This standard specifies the general requirements for conduit fittings and accessories for heavy-duty rigid electrical conduit and cable installations, and the deployment of special wiring systems.
Parts, cast metal boxes and duct bodies, special types, signs, and type tests of cast metal boxes and duct bodies.
This standard applies to accessories and accessories that comply with GB/T 17193 Extra Heavy Load Rigid Steel Conduit (EHDERS), including cast metal boxes
And the catheter body.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 5169.15-2015 Fire hazard test for electric and electronic products Part 15. Test flame 500W flame device
And validation test methods (IEC 60695-11-3..2012, IDT)
GB/T 16422.2-2014 Plastic laboratory light source exposure test methods-Part 2. Xenon arc lamps (ISO 4892-2..2006,
IDT)
GB/T 17193 Super heavy duty rigid steel conduit for electrical installation (GB/T 17193-1997, idtIEC 981. 1989)
GB/T 20666 unified thread tolerance (GB/T 20666-2006, ISO 5864..1993, MOD)
GB/T 20669 unified thread profile (GB/T 20669-2006, ISO 68-2..1998, MOD)
GB/T 20670 unified thread diameter and number of teeth series (GB/T 20670-2006, ISO 263. 1973, MOD)
ISO 301..2006 Zincaloyingotsintendedforcastings
3 terms and definitions
The following terms and definitions apply to this document.
3.1
Elbow anglefitting
Accessories for changing the direction of the pipeline when the catheter enters the box or casing (with or without a cap).
3.2
Box box
Enclosure without cover, but with cover and duct and cable entry on the surface.
3.3
Box Fitting
A connector that connects a non-threaded (or threaded) metal conduit (or cable) to a demolding opening in a box or enclosure.
3.4
Bushing
Fittings to protect the wires from abrasion, mainly installed at the entrance and exit of the conduit system.
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