1. Scope: This standard specifies the type test items, technical requirements, test methods, and judgment criteria for wire and cable products. This standard is applicable to the type inspection of cross-linked polyethylene insulated power cables and rubber insulated power cables with a rated voltage of 1kV and below 2. References: The clauses in the following documents have become clauses of this standard through reference: GB 3096.1-1997 Low Voltage AC Electrical Installations Part 1: General Requirements GB 3096.2-1998 Low Voltage AC Electrical Installations Part 2: High Voltage AC Transmission and Transformation Equipment Part 2: Transformers GBt 3-2006 Fixed Metal Armored Power Cables jbt 9095.1-2005 Vertical Bend Test Method for Overhead Insulated Conductors
3. Product Classification and Marking
1. It can be divided into bare wire and bare conductor products according to their purpose According to structural characteristics, it can be divided into single core wires, multi-core wires, and stranded wires According to the nature of transmitted electrical energy, it can be divided into DC power cables and AC power cables According to different environmental conditions, it can be divided into indoor lighting wires and outdoor wiring wires 4. Type Test Item (1) Basic Performance a) Conductor Resistance b) Insulation Resistance c) Absorption Ratio d) Dielectric Loss Factor (tg) δ） （2） Mechanical and physical properties a) tensile strength b) elongation at break c) compressive strength d) bending resistance e) hardness of the outer protective layer f) wear resistance g) flame retardancy h, thermal stability i, low smoke zero halogen or low smoke low halogen 1. The product should comply with the provisions of Table 1 2. When the product leaves the factory, it should be accompanied by a product quality certificate and manufacturing date, and should have one of the following marks: a. model or specification code; b. The name of the production factory and the production license number c. The trademark or brand d. The rated voltage of kV and below is marked with the word "d". The rated voltage of kV and above is marked with the word "f" 3. The allowable tolerance for copper core plastic sheathed flexible cables of the same model is ± 0.5%, and the allowable tolerance for aluminum plastic composite tape shielded flexible cables is ± 0.5% 4. The length error of copper core plastic sheathed flexible cables of different models should not exceed 10cm, and the total cross-sectional area difference should not exceed 0.2%
5. The maximum distance between any two junction boxes of hard buried tubular cables with copper core plastic sheath laid in coaxial should not exceed 30m 6. Aluminum clad steel or tinned iron for coaxial laying
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China