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A satellite TV wall socket is a low-voltage connection port used for transmitting television signals, satellite signals, and radio frequency signals. Unlike 220V or 110V high-voltage sockets, satellite TV wall sockets only transmit signals, not power.

USB wall socket is a power device that integrates a traditional AC power socket with a USB DC output interface on the same panel. • Directly output 5V or other standard USB DC voltages • Built-in power conversion module (AC to DC) • Powers USB devices without an external charger • Typically installed on the wall in combination with a regular socket

Based on industry standards and electrical wiring experience, in a 220V power system: • 2.5mm² copper wire: commonly used with a maximum capacity of 16A • 4mm² copper wire: can carry 20A~25A • 6mm² copper wire: commonly used for high-power equipment around 32A Therefore, the most suitable wire for a 20A DP wall switch is: ✅ 4mm² copper core wire (BV 4mm² or RV 4mm²)

Assuming a rated voltage of 250V and a current of 20A, the maximum theoretical power is: 20A × 250V = 5000W This means that a 20A DP Wall Switch can theoretically withstand a maximum load of 5000W.

20A DP wall switches are primarily used for: • High-power electric heating equipment (water heaters, space heaters, etc.) • High-load kitchen equipment (ovens, induction cookers, etc.) • High-power bathroom equipment • Appliances requiring double-pole isolation • Large, fixed-installation appliances

A 20A DP wall switch generally contains two independent switching units: • The first pole disconnects the live wire (Live). • The second pole disconnects the neutral wire (Neutral). Both poles operate simultaneously, meaning they disconnect or connect simultaneously. The internal structure can be summarized as: Live wire: L IN → L OUT Neutral wire: N IN → N OUT