T/GDWCA 0033-2018 Abolished Group standards

T/GDWCA 0033-2018 headphone cable

Publish Date: 2018-08-01 Implement Date: 2018-09-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/GDWCA 0033-2018

Standard Type: Group standards

Standard Status: Abolished

is_force_gb: no

CCS Name: Electroacoustic devices

ICS Name: Cable

Publish Date: 2018-08-01

Implement Date: 2018-09-01

Scope

Scope: This standard specifies the product classification, usage characteristics, requirements, test methods, inspection rules, marking, packaging, transportation, and storage of headphone cables. This standard applies to the connecting cables of headphone devices or those used to connect headphones to audio equipment. This standard does not involve any fiber optic components or fiber optic component groups. Main technical content: I. Usage characteristics: Under normal use, the rated voltage of headphone cables is DC 30 V or lower. II. Materials: 1. Enameled wires, which shall comply with the requirements of GB/T 6109 or NEMA MW 1000-2016. 2. Bare copper wires, which shall comply with the requirements of GB/T 3953. 3. Tinned copper wires, which shall comply with the requirements of GB/T 4910. III. Resistance: 1. The resistance of a single conductor shall comply with the relevant provisions of JIS C 3202-1994, GB/T 3953, and GB/T 4910. 2. The resistance of stranded conductors shall comply with the relevant provisions of UL758/2004 for stranded conductor resistance. IV. Insulation resistance: The insulation resistance of headphone cables shall be not less than 10 MΩ/m. V. Direct welding: At room temperature, expose 10 mm to 20 mm of the core wire. Immerse the core wire in a tin furnace at a temperature of 430℃ ± 10℃ for 1 s to 3 s, maintaining a distance of 1 mm to 2 mm between the insulated end face and the tin surface. Lift the sample from the tin furnace to observe its appearance and check whether the insulation sheath has expanded or contracted. Alternatively, at room temperature, expose 5 mm to 10 mm of the conductor. Immediately immerse the conductor in a tin furnace at a temperature of 460℃ ± 10℃ for 1 s to 3 s, maintaining a distance of 1 mm to 2 mm between the insulated end face and the tin surface. Lift the sample from the tin furnace to observe its appearance and check whether the conductor wire is blackened or evenly tin-coated.