From the perspective of product design, electrical parameters, and load matching, the common operating power range of fan speed control wall switches is typically:
Minimum power approximately 75W
Maximum power approximately 500W
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.
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
Common home wall switches on the market come in two main current ratings:
• 10A home wall switch
• 16A home wall switch
These two ratings are the most common designs in current home environments and form the basis for most standard lighting and power control.
