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As a relay device for power distribution of multiple devices, the safety of power strip depends on the coupling relationship between structural characteristics and environmental parameters.

The conductive cross-sectional area and surface plating process of metal contacts determine the continuous current carrying capacity, and the oxidation process of the connection point may lead to nonlinear growth of contact impedance. The density of the socket arrangement of power strip and the geometric design of the heat dissipation channel of the shell jointly affect the local temperature field distribution. The balance between the heat accumulation rate and the temperature resistance threshold of the material under overload conditions needs to be monitored.

The cable extension length and the conductor resistivity form a multiplication effect of voltage drop, and the terminal device may face the risk of undervoltage. The instantaneous current impact during dynamic load switching is subject to the response delay of the internal protection circuit, and frequent start and stop of high-power equipment is prone to contact arcing. The mechanical matching tolerance of the power strip plug and the socket affects the stability of the contact pressure, and the plug offset may cause the effective contact area to be reduced.

The environmental humidity affects the insulation performance through the surface creepage distance, especially in a confined space, condensed water vapor may change the dielectric breakdown characteristics. The cascade impedance formed by multiple power strips will accumulate the ground potential difference, which may interfere with the reference level of sensitive equipment. The standby power consumption and power waveform distortion rate of the intelligent control module may generate additional electromagnetic interference.