The waterproof level of a connecting cable is primarily determined by its IP (Ingress Protection) rating, specifically the second digit following the "IP". This digit indicates the waterproof capability, with a higher digit indicating stronger protection:

For example, IP68 indicates complete dustproof (6) + long-term immersion (8), suitable for underwater equipment, marine environments, etc

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How to determine the waterproof rating of a connecting cable?

Check the product label or manual: Regular products will be labeled with an IP rating.

View certification or test reports: such as IEC 60529 standard testing.

Observing structural design: High-quality waterproof cables typically feature multiple layers of sealing rings, waterproof rubber rings, threaded locking structures, etc

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Common testing methods (for verification):

Water immersion test: Applicable to IPX7/IPX8. Check for water infiltration after immersion.

Spray test: Applicable to IPX5/IPX6, simulating rainwater or jet water.

Air tightness test: It detects the sealing performance, indirectly reflecting the waterproof ability