The wire calculates the withstand current 10, and the wire calculates the withstand current

Share] Wire & Power 1and 4mm2 wires and cables refer to the cross-sectional area of the cable and 4mm2 respectively

2.Under the usual heat dissipation conditions: the safe current of the aluminum wire is 4 5 A mm 2; Copper wire safety current 5 6 A mm 2 ;

If the voltage is calculated as 220V:

Copper core wire: The cross-sectional area of copper core wire allows for long-term current.

Square mm (16A, 25A) 5500W4 square mm (25A, 32A) 7000W6 square mm (32A, 40A) 9000W aluminium core wire: Aluminum core wire cross-sectional area Allowable long-term current.

Square mm (13a, 20a) 4500w4 square mm (20a, 25a) 5500w6 square mm (25a, 32a) 7000w, the power carried when using the trunking is reduced by 20%.

One square wire is capable of withstanding 3A to 5A.

The number of wires squared.

It is a colloquial term in the construction of decoration water and electricity, and it is often said that how many square wires are not added to the unit, that is, the square millimeter.

The square of the wire is actually marked by the cross-sectional area of the wire, that is, the area of the circular cross-section of the wire, in square millimeters.

Generally speaking, the empirical power carrying capacity is about 1 kilowatt per square wire when the voltage of the leakage friendly network is 220V. Each square copper wire can carry kilowatts, and aluminum wire can carry kilowatts per square or stupid. Therefore, an appliance with a power of 1 kilowatt requires only one square copper wire.

Specific to the current, when short-distance power transmission, the general copper wire can carry 3A to 5A of current per square meter. The heat dissipation condition is good to take 5A square millimeter, and it is not good to take 3A square millimeter.

For example, when the power consumption of a single piece is 3000 watts, the theoretical current of the electrical appliance should be 3000 (watts) 220 (volt) ampere

Theoretically, the closest practical should be 3 square millimeters of copper wire, but because there is no 3 square millimeters of copper wire in production, 4 square millimeters of copper wire should be used in practical application.

The carrying current of the old wire is calculated to ensure that the wire can safely transmit the required current. If the current of the wire is too large and exceeds its design capacity, it will cause the wire to blindly rise over the source heat or even short circuit, causing safety risks such as fire and electric shock. Therefore, calculating the carrying current of the wire can help determine the size of the wire and how to install it to ensure that the wire can transmit current safely and reliably under normal use.