How much power can 1 square millimeter of copper wire withstand? How much power can 1 square millimeter
of aluminum wire withstand?
Aluminum core wire (copper core wire) with a cross-sectional area of 1 square millimeter, copper wire 5A-8A,
aluminum wire 3A-5A.
The current carrying capacity of 2.5 square meters aluminum core wire and 1.5 square meters copper core wire
is the same, but if possible, try to use copper core wire. Aluminum core wire is not strong enough and easy to break.
The maximum carrying capacity of the 2.5 square aluminum core wire is 12.5A, but the wire must be passed through
the tube. Depending on the ambient temperature and other factors used, its safe current carrying capacity is about
9.5A, and the maximum power it can withstand is 2000W.
The power that a copper wire can carry is related to the heat dissipation of the wire. Generally, 1 square millimeter
can carry about 1kW of power.
The load current value of copper wires specified in the national standard GB4706.1-1992/1998 (part):
2.5 square millimeters (16A～25A)
4 square millimeters (25A～32A)
6 square millimeters (32A～40A)
For simplicity, the calculation can be unified based on the rated current of 6A per square, so the power P that KE can bear is:
P=UIcosφ=0.22×6 × 0.65=0.858kW (calculated based on standard single-phase electricity, cosφ is the load power factor,
which is generally 0.65 for single-phase), and can be rounded to 1kW.
Generally speaking, the smaller the wire, the smaller the total heat generation, the better the heat dissipation, and the greater
the power it can withstand per square meter; the larger the wire, the greater the total heat generation, the worse the heat
dissipation, and the greater the power it can bear per square meter. Just smaller.