GB/T 3048.4-2025 English PDFUS$279.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 3048.4-2025: Test methods for electrical properties of electric cables and wires - Part 4: Test of DC resistance of conductors Status: Valid GB/T 3048.4: Historical versions
Basic dataStandard ID: GB/T 3048.4-2025 (GB/T3048.4-2025)Description (Translated English): Test methods for electrical properties of electric cables and wires - Part 4: Test of DC resistance of conductors Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: K13 Classification of International Standard: 29.060.20 Word Count Estimation: 14,181 Date of Issue: 2025-08-29 Date of Implementation: 2026-03-01 Older Standard (superseded by this standard): GB/T 3048.4-2007 Issuing agency(ies): State Administration for Market Regulation, National Standardization Administration GB/T 3048.4-2025: Test methods for electrical properties of electric cables and wires - Part 4: Test of DC resistance of conductors---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT3048.4-2025 ICS 29.060.20 CCSK13 National Standard of the People's Republic of China Replaces GB/T 3048.4-2007 Test methods for electrical properties of wires and cables Part 4.Conductor DC resistance test Released on August 29, 2025 Implementation on March 1, 2026 State Administration for Market Regulation The National Standardization Administration issued Table of ContentsPreface III Introduction V 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Test equipment 1 5 Sample preparation 3 6 Test conditions 4 7 Test Procedure 4 8 Test results and calculations 5 9 Test Log 6 Preface This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document is Part 4 of GB/T 3048 "Test methods for electrical properties of wires and cables". GB/T 3048 has been published in the following parts. --- Part 1.General provisions; --- Part 2.Resistivity test for metallic materials; --- Part 3.Volume resistivity test for semi-conductive rubber and plastic materials; --- Part 4.Conductor DC resistance test; --- Part 5.Insulation resistance test; --- Part 7.Tracking resistance test; --- Part 8.AC voltage test; --- Part 9.Spark test for insulated wire cores; --- Part 10.Spark test for extruded sheath; --- Part 11.Dielectric loss tangent test; --- Part 12.Partial discharge test; --- Part 13.Impulse voltage test; --- Part 14.DC voltage test; --- Part 16.Surface resistance test. This document replaces GB/T 3048.4-2007 "Test methods for electrical properties of wires and cables - Part 4.Conductor DC resistance test" Compared with GB/T 3048.4-2007, in addition to structural adjustments and editorial changes, the main technical changes are as follows. --- Added general sample preparation method (see 5.1); --- Added description that the length of the sample potential electrode can be in accordance with the product standard (see 5.1.1); --- Added the preparation requirements for multi-core stranded specimens (see 5.1.1); --- Changed the description of removing the insulation and sheath of the outer surface of the sample conductor (see 5.1.1, 4.1 of the.2007 edition); --- Added aluminum alloy conductor sample preparation method (see 5.2); --- Added the method for preparing split conductor specimens (see 5.3); --- Added specific requirements for the placement time before conductor resistance measurement (see 6.1.1 and 6.1.2); --- Added the measurement method for split conductor specimens and stranded aluminum conductor (including aluminum alloy conductor) specimens (see 7.8); --- Added the calculation formula for resistance test results (see 8.1.1 and 8.1.2); --- Increased the resistance temperature coefficient of common materials (see 8.2.1). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document is proposed by the China Electrical Equipment Industry Association. This document is under the jurisdiction of the National Technical Committee for Standardization of Wires and Cables (SAC/TC213). This document was drafted by. Shanghai Guolan Testing Co., Ltd., Shanghai Cable Research Institute Co., Ltd., Zhongtian Technology Submarine Cable Co., Ltd. Company, Qingdao Hancable Co., Ltd., Baosheng Technology Innovation Co., Ltd., Far East Cable Co., Ltd., Hengtong (Huimin) Electric Energy Technology Co., Ltd. Co., Ltd., Jiangsu Shangshang Cable Group Co., Ltd., Hangzhou Cable Co., Ltd., Zhejiang Chint Cable Co., Ltd., Kunming Cable Group ELECTRICAL CABLE LIMITED. The main drafters of this document are. Li Chuang, Xiao Jingcheng, Xu Xiaofeng, Zhang Jianmin, Zhao Yingrong, Chen Dayong, Chen Jing, Ju Linlin, Yang Jingyun, Yang Liwei, Tao Ruixiang, Xie Haishun, Qin Kai, and Hu Dongwei. The previous versions of this document and the documents it replaces are as follows. ---First published in 1965 as GB 764-1965, first revised in 1983 as GB 3048.4-1983, second revised in.1994 Established as GB/T 3048.4-1994, revised for the third time in.2007 to GB/T 3048.4-2007; ---This is the fourth revision.introductionWire and cable products are widely used in power transmission and electrical signal transmission. There are many types of products depending on the application scenario. It is an important general indicator of the performance of wires and cables, and is of great significance for ensuring the design and use objectives of wires and cables. Establish a general basic test method for electrical performance testing of different types of wire and cable products. GB/T 3048 is intended to consist of the following 14 parts. Divided into components. --- Part 1.General. The purpose is to specify the terms, definitions and general provisions of the test methods for electrical properties of wires and cables. --- Part 2.Metallic material resistivity test. The purpose is to specify the test method and requirements for the resistivity of metallic materials for wires and cables. --- Part 3.Volume resistivity test of semi-conductive rubber and plastic materials. The purpose is to specify the volume resistivity of semi-conductive rubber and plastic materials of wires and cables. Test methods and requirements for resistivity. --- Part 4.Conductor DC resistance test. The purpose is to specify the test method and requirements for the DC resistance of wire and cable conductors. --- Part 5.Insulation resistance test. The purpose is to specify the test methods and requirements for the insulation resistance of wires and cables. --- Part 7.Tracking resistance test. The purpose is to specify the test method and requirements for tracking resistance of wires and cables. --- Part 8.AC voltage test. The purpose is to specify the test methods and requirements for AC voltage of wires and cables. --- Part 9.Insulated core spark test. The purpose is to specify the test method and requirements for the spark of the insulated core of wires and cables. --- Part 10.Spark test for extruded sheath. The purpose is to specify the test method and Require. --- Part 11.Dielectric loss tangent test. The purpose is to specify the test method and Require. --- Part 12.Partial discharge test. The purpose is to specify the test methods and requirements for partial discharge of wires and cables. --- Part 13.Impulse voltage test. The purpose is to specify the test methods and requirements for impulse voltage of wires and cables. --- Part 14.DC voltage test. The purpose is to specify the test methods and requirements for DC voltage of wires and cables. --- Part 16.Surface resistance test. The purpose is to specify the test method and requirements for the surface resistance of wires and cables. Note. The original GB/T 3048 standard system has 16 parts. Since GB/T 3048.5-2007 replaced GB/T 3048.5-1994 and GB/T 3048.6- 1994; GB/T 3048.9-2007 replaced GB/T 3048.9-1994 and GB/T 3048.15-1994, so the GB/T 3048 standard system is now less Part 6 and Part 15. Test methods for electrical properties of wires and cables Part 4.Conductor DC resistance test1 ScopeThis document describes the test method for the DC resistance of conductors of wires and cables, including test equipment, sample preparation, test conditions, test procedures, and sequence, test results, calculations and test records. This document is applicable to the measurement of DC resistance of wire and cable conductors. The measurement range is. ---Double-arm bridge. 1×10-7Ω~99.9Ω; ---Single-arm bridge. 1Ω and above. This document is not applicable to measuring the DC resistance of conductors of installed wires and cables.2 Normative referencesThe contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 2900.10 Electrical terminology cables GB/T 3048.1 Test methods for electrical properties of wires and cables Part 1.General3 Terms and DefinitionsThe terms and definitions defined in GB/T 2900.10 and GB/T 3048.1 and the following apply to this document. 3.1 Manufacturing lengths of wire and cable arranged on reels or coiled into samples.4 Test equipment4.1 The schematic diagram of a single-arm bridge is shown in Figure 1, and the schematic diagram of a double-arm bridge is shown in Figure 2. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 3048.4-2025_English be delivered?Answer: Upon your order, we will start to translate GB/T 3048.4-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 3048.4-2025_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 3048.4-2025_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 3048.4-2025?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 3048.4-2025 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
