How much current can a 4 square meter wire carry?

　　The two factors of current and voltage have a crucial impact on the cable. If the voltage or current passing through the cable does not meet the requirements, the cable may be damaged, thus affecting its normal operation. So, how much current can a 4 square meter cable usually carry?

　　The load capacity of the cable is not only related to the voltage, but also to the current. Different voltages and currents will result in different load capacities of the cable. The current that a 4 square meter cable can withstand is related to the cross-section of the core board and the cable.

　　For copper core cables, the cables with cross-sections of 2.5 square meters, 4 square meters and 6 square meters have allowable long-term currents of 16A-25A, 25A-32A and 32A-40A respectively; for aluminum core cables, the allowable long-term currents of cables with cross-sections of 2.5 square meters, 4 square meters and 6 square meters are 12A-20A, 20A-25A and 25A-32A respectively.

　　For example: the power consumption of a computer is 200-300W (about 1-1.5A). If you have 10 computers, you will need to use 2.5mm² copper cables to power the system to avoid overloading the cables.