What is the range of wire diameter adaptation for the incoming end of a single-phase lighting electrical ready board? What is the recommended diameter for a single lighting line at the output end?

1、 The range of wire diameter adaptation for the incoming end of the household lighting electrical ready board (only applicable to household scenarios, mainly copper core wires, in compliance with household power distribution standards)

The core diameter of the household incoming line is matched with the total lighting load and laying method of rural households in Africa (most households use conduit concealed laying), and BV/BVR copper core wire is preferred (preferred for household use, anti-oxidation, stable current carrying capacity), with a clear range of adaptability and suitable for the actual needs of households.

Household supplementary requirements (key points to note):

-The diameter of the live wire (L) and neutral wire (N) at the incoming end must be consistent, and the diameter of the protective earth wire (PE) must not be less than 1/2 of the incoming wire diameter and not less than 2.5mm ² (the minimum specification for household bottom wire to ensure grounding safety);

-It is strictly prohibited to use aluminum wire for household use. Aluminum wire is prone to oxidation and the joints are prone to heating, which poses a safety hazard;

-When installing concealed pipes, the upper limit of the wire diameter can be appropriately selected to reduce the voltage drop of the circuit (due to poor heat dissipation of concealed pipes, a residual current carrying capacity should be reserved).

2、 Recommended wire diameter for single circuit lighting at the outlet of household lighting electrical ready board (exclusive for household single circuit, adapted to the characteristics of household lighting)

The single line path at the output end is centered around "adapting to single line loads, balancing safety and wiring convenience", and copper core wires are recommended, divided into conventional and preferred options, suitable for household single circuit lighting scenarios (single line with only lighting, not mixed sockets):

1. General recommendation (most commonly used for household use, preferred): 1.5mm ² copper core wire (BV/BVR), safe current carrying capacity of 14-17A (concealed installation through pipes), capable of carrying 10-15 single LED lights (single LED light power of 10-20W), compatible with 10A single pole air switch, with the highest cost-effectiveness, covering more than 90% of household single circuit lighting needs (such as single bedroom, living room single circuit lighting);

2. Preferred recommendation (considering reliability and suitable for specific scenarios): 2.5mm ² copper core wire, safe current carrying capacity of 19-24A, higher mechanical strength, suitable for scenarios with long lines (such as villa corridors, long-distance circuits on large levels) and single load close to 3kW (such as concentrated circuits with a large number of spotlights), can effectively avoid flickering of end lamps, and is also compatible with 16A switches, leaving room for load adjustment;

3. Special single circuit (such as balcony, bathroom waterproof lighting, or single circuit with high-power lighting fixtures): 2.5mm ² copper core wire is still preferred, combined with waterproof junction boxes to ensure electrical safety in humid environments. The wire diameter is not recommended to be less than 1.5mm ² (the minimum wire diameter for single circuit household lighting to avoid mechanical damage and short circuits).

Key points to note for household use:

-Single channel lighting load must not exceed 3kW, and the corresponding wire diameter should not be less than 1.5mm ² to avoid single channel overload;

-Each lighting outlet is equipped with a separate switch, and the wire diameter matches the rated current of the switch (1.5mm ² for 10A switch, 2.5mm ² for 16A switch);

-The neutral wire (N) and the live wire (L) have the same diameter, and the ground wire (PE) has a diameter of not less than 1.5mm ² (the minimum specification for a single ground wire).