What is a waterproof wire harness?

I. Key Points for Selecting Waterproof Connectors

• Connectors must be able to provide safe and reliable connections.
• Advanced waterproof-structured connectors with a waterproof rating equal to or higher than the IPX7 protection level should be preferred.
• Meanwhile, connectors produced by regular manufacturers should be chosen.
• For example, the Kaweei brand can effectively guarantee the waterproof performance of connectors with its strict quality control system, excellent processing and assembly precision, and multiple performance tests.

II. Key Elements in Wire Harness Design

• The diameter of the wire should match that of the connector, neither larger nor smaller than the diameter specified by the connector.

III. Important Links in the Production Process

• Waterproof terminals must be crimped using special crimping molds, and the crimped terminals must meet relevant technical requirements.

Heat-shrink protection for solder joints and connection points:

• When welding the grounding points of wire harnesses, heat-shrink sleeves must be used for protection.
• The copper wires should not pierce the heat-shrink tubes, and the heat-shrink tubes must completely wrap the copper wires.
• The heat-shrink sleeves also need to meet relevant technical requirements.

IV. Standard Procedures for Air Tightness Testing

• The sealing performance of waterproof wire harnesses is tested by an intelligent sealing testing system.
• Connect the two ends of the wire harness to the corresponding fixtures, introduce compressed air for pressure testing, and then determine whether the sealing performance is qualified.
• The testing standards are as follows: the testing pressure is set at 20 KPa; the inflation time is 10 seconds; the holding pressure time is 5 seconds; the testing time is 10 seconds; and the pressure loss should be less than or equal to 0.05 KPa.
• Within the specified time range, if the pressure loss is less than the specified value, it indicates that the sealing performance is good and meets the requirements of waterproof wire harnesses, and the product performance is qualified.
• Many factories will conduct electrical performance testing, sealing performance testing, and appearance testing on each waterproof wire harness in turn to ensure that the product quality meets the standards.

Only by fully implementing strict waterproof wire harness design, purchasing waterproof wire harnesses produced by regular manufacturers, strictly following the waterproof wire harness production process, and carrying out meticulous quality inspections can qualified waterproof wire harnesses be produced.

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