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GB/T 34016-2017Generality of rat and termite proof wires and cables (English PDF)

防鼠和防蚁电线电缆通则

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

July 12, 2017

Implementation date

February 1, 2018

Scope

GB/T 34016-2017 is the English-translated version of 防鼠和防蚁电线电缆通则.

GB/T 34016-2017 is the general specification for rat-proof and termite-proof wires and cables. It fixes the product classification and marking, the technical requirements, the inspection rules and the test methods.

Rat-proof performance is expressed by the protection rate P determined in JB/T 10696.10-2011 together with a description of the test piece surface after the test, the top code FS1 asking for P not less than 0.9 with no teeth marks or visible bite marks and a bite depth under 1 mm.

A rat-proof and termite-proof cable must keep the protection continuously and effectively in service; any physical or chemical protection added to a product calls for type tests, and the materials and processes used must not harm human health or the surrounding ecology.

Type tests are run by a third-party institution, on a test piece of any specification not more than 30 mm in outside diameter for the rat-proof test and of any specification for the termite-proof test, and continuity and effectiveness are judged by repeating the characteristic tests after accelerated ageing.

A normative annex adds the confirmatory rat-proof test for cables over 30 mm in diameter, run for 14 consecutive days with twenty SD rats about twelve weeks old on eight 300 mm by 30 mm sheath strips of (2.0 plus or minus 0.2) mm thickness.

Terms come from GB/T 2900.10 and GB/T 50768, ageing testing from GB/T 2951.12 and the termite test from JB/T 10696.9-2011. It applies to wires and cables with rat-proof characteristics, with termite-proof characteristics, and with both. Issued on 12 July 2017, it has applied since 1 February 2018.

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Document preview — GB/T 34016-2017

National Standard of the People's Republic of China

ICS: 29.060.20
Classification: K 13

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword3
1 Scope4
2 Normative References4
3 Terms and Definitions4
4 Product Classification and Marking5
5 Technical Requirements7
6 Inspection Rules8
Appendix A (normative) Confirmatory Test Method of Rat-proof Characteristic of Large-diameter Wires and Cables11
Bibliography13

1 Scope

This Standard stipulates the product classification, marking, technical requirements, inspection rules and test methods of rat and termite proof wires and cables.

This Standard is applicable to wires and cables equipped with rat-proof characteristic; wires and cables equipped with termite-proof characteristic; wires and cables which have both characteristics in rat and termite proof.

2 Normative References

The following documents are indispensable to the application of this document. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document.

GB/T 2900.10 Electrotechnical Terminology - Electric Cables

GB/T 2951.12 Common Test Methods for Insulating and Sheathing Materials of Electric and Optical Cables - Part 12: Methods for General Application - Thermal Ageing Methods

GB/T 50768 Standard for Basic Terminology of Termite Control Project

JB/T 10696.9-2011 Test Methods for Determining Mechanical, Physical and Chemical Properties of Electric Cables and Wires - Part 9: Termite Test

JB/T 10696.10-2011 Test Methods for Determining Mechanical, Physical and Chemical Properties of Electric Cables and Wires - Part 10: Rat Gnawing Test

3 Terms and Definitions

What is defined in GB/T 2900.10 and GB/T 50768, and the following terms and definitions are applicable to this Standard.

3.1 Rat Proof

Rat proof means under the stipulated test conditions, after the test piece and the test rat co-exist for a stipulated period of time, the characteristic of test piece area loss in the most severely bitten area within a limited range. […]

4 Product Classification and Marking

Example 2: rat-proof Grade-1; copper core PVC insulated steel tape armored PVC sheathed control cable; used for fixed laying; rated voltage: 450/750 V, 24 core; 1.5 mm²; steel tape armoring; without green/yellow two-color insulated wire core; implemented standard: GB/T 9330.2-2008, shall be represented as:

Example 3: rat-proof Grade-2 and termite-proof Grade-1; flame retardant Class-B; ethylene propylene rubber insulated copper wire braided armored elastic outer sheathed marine control cable; rated voltage: 150/250 V, 19 core; nominal cross-sectional area: 1.5 mm²; implemented standard: GB/T 9332-2008 and GB/T 19666-2005, shall be represented as: […]

5 Technical Requirements

5.1 General Requirements

5.1.1 During the operation, rat-proof and termite-proof wires and cables shall continuously and effectively be equipped with the expected protection performance stipulated in 5.2, 5.3 or 5.4.

5.1.2 No matter what kind of physical protection or chemical protection measures are taken, as long as products with rat-proof, termite-proof or rat and termite-proof characteristics are added, type tests shall be conducted in accordance with the stipulations in 6.1.

5.1.3 Cable materials and their processing technology (including after certain protective measures are adopted) that are selected to implement the rat-proof and termite-proof characteristics shall not affect human health or destroy the surrounding natural ecology and environment.

5.2 Rat-proof Characteristic

The magnitude of rat-proof characteristic of wires and cables shall adopt protection rate value-P, which is determined in JB/T 10696.10-2011, and test piece surface descriptive evaluation after the tests. In addition, it shall also comply with the stipulations in Table 2.

Table 2 -- Magnitude Requirements of Rat-proof Characteristic of Wires and Cables (columns: Code / Characteristic Magnitude / Test Piece Surface Description after Tests)

FS1 / P >= 0.9 / There are no teeth marks or visible bite marks on the surface of the test piece sheath, and the bite depth shall be less than 1 mm.

6 Inspection Rules

6.1.1 The rat and termite-proof characteristic of wires and cables shall adopt type tests for evaluation, which includes characteristic tests of unaged and after accelerated ageing treatment (6.2).

6.1.2 Type test items of rat and termite-proof wires and cables shall comply with, or, fully cover the requirements of various implemented standards provided in the basic model, and the rat-proof and termite-proof characteristic.

6.1.3 In terms of the same model of rat-proof and termite-proof wires and cables of multiple specifications, at least one specification of products shall be taken for tests of the characteristic index. If the test pieces are qualified, then, it can be determined that all the specifications of the model have the stipulated characteristic.

6.1.4 If the manufacturer has a valid type test report of the same basic model of products, which are not attached with the rat-proof and termite-proof characteristic, test pieces for the type tests of corresponding rat-proof and termite-proof products may be randomly taken from the manufacturer, or, from the user's current stock.

6.1.5 Test pieces used for the tests of the rat-proof characteristic of wires and cables shall be taken from any specification of products whose external diameter is not more than 30 mm. When there are multiple options, preferably choose the specification with a smaller external diameter.

6.1.6 Test pieces used for the tests of the termite-proof characteristic of wires and cables may be taken from any specification of products. When there are multiple options, preferably choose the specification with a larger external diameter.

6.1.7 Test pieces used for the tests of the rat-proof and termite-proof characteristic of wires and cables may be taken from any specification of the same product whose external diameter is not more than 30 mm, or, be respectively taken from different specifications of products on the premise of satisfying 6.1.5 and 6.1.6.

6.1.8 Type tests shall be completed by a third-party inspection institution entrusted by the manufacturer. When the user has demands, through the negotiation between the demand-side and the supply-side, type tests may be re-conducted. Under the circumstance that there are no changes in cable materials, or design, or manufacturing process, the re-conducted type test items can merely include characteristic index tests in accordance with the stipulations in 5.2, 5.3 and 5.4.

6.2 Determination of Continuity and Effectiveness

6.2.1 After the accelerated ageing treatment of test pieces of wire and cable products, determine the rat-proof, termite-proof, or rat and termite-proof characteristic magnitude in accordance with the test methods described in 5.2, 5.3 and 5.4. Adopt this method to evaluate its continuity and effectiveness.

6.2.2 The recommended ageing treatment conditions are shown in Table 5. Test

Appendix A (normative) Confirmatory Test Method of Rat-proof Characteristic of Large-diameter Wires and Cables

A.1 General Principle

This Method is applicable to the confirmation of the rat-proof characteristic of wires and cables (external diameter is more than 30 mm) which are qualified in type tests.

This Method is not applicable to relevant rat-proof characteristic test requested in type tests.

A.2 Variety and Breeding of Rats

The variety and breeding of rats shall comply with the stipulations in JB/T 10696.10-2011.

A.3 Test Methods

A.3.1 Test conditions

A.3.1.1 SD rats: around 12-week-old; mass of female rats: (250 ± 20) g, mass of male rats: (300 ± 20) g; quantity: 10 female rats and 10 male rats; 5 rats of the same gender in each cage; respectively 2 cages of rats. Add rat breeding necessities to each cage, namely, sawdust, feeds and water. Breed the rats in a clean-level facility, or above.

A.3.1.2 Test pieces: from finished cables, produce sheath strip test pieces; flatten or grind the test pieces to the thickness of (2.0 ± 0.2) mm. Then, cut 300 mm x 30 mm strip test pieces. Produce 8 test pieces in total.

A.3.1.3 Environmental conditions: clean-level, or above.

A.3.1.4 Other articles: micrometer, air condition, balance, water bottle, rat feeds, sterilized clothes, gloves and masks, etc.

A.3.2 Test procedures

Place 2 test pieces in each cage. The test pieces shall be hanged in the middle of the rat cage. Conduct the test for 14 successively days. Maintain normal feeding every day; observe the rats' activities, diet and the biting of the test pieces. In addition, complete surface description and the record of time. […]

A.4 Evaluation of Test Results

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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