Talk about how many kilowatts can be loaded in different squares of the wire

The wire load is something that everyone pays more attention to before buying wires. At present, the commonly used wire specifications are 1 square wire, 1.5 square wire, 2.5 square wire, 4 square wire, 6 square wire, etc., how much can these wires carry? Where's the tile? This is also something that everyone is more concerned about.

Let's take a closer look at how many watts a 1, 1.5, 2.5, 4, 6 square wire can carry.

First give Xiaobai science, 1 square wire: a wire with a cross-sectional area of ​​1 square millimeter. And so on

How many watts can a 1-square wire carry?

An "empirical formula" commonly used by electricians: As long as it is a copper core wire, its cross-sectional area per square millimeter can safely pass a rated current of 4--5A; in a 220V single-phase circuit, its current is about 4.5A per 1KW of power. Left and right; in a 380V three-phase balanced circuit, its current is about 2A per 1KW of power.

The above values ​​can be calculated very close by physical calculation formulas, so in the work of the electrician, in order not to memorize those "trivial" calculation formulas, it is enough to remember these. Then according to this algorithm, it is known that if the copper core wire with a cross-sectional area of ​​1 square millimeter is used in a 220V single-phase circuit, it can safely carry the current passed by a 1KW load; if it is used in a three-phase balanced load (such as a motor) In the circuit, it can safely carry the current passed by the 2.5KW load.

Second, how many watts can a 1.5 square wire load

If the power cord is a copper core wire, the first is the maximum allowable working current for open-line installation is 20A, which is 4400 watts; the second is the concealed sleeve steel pipe, the current is 16A, the power is 3520 watts; the third is the PVC pipe concealed, the current is 14A, Then the power is 3000 watts.
 

How many watts can a 2.5 square wire

How many kilowatts of electricity are received for 2.5 square wires, the current value of the wire load specified in GB4706.1-1992 / 1998, copper core wires 2.5 square millimeters 16A ～ 25A about 5500 watts, aluminum core wires 2.5 square millimeters 13A ～ 20A about 4400 watts 220VAC voltage does not exceed 10A for a long time, and most of the time does not exceed 15A is considered safe.

How many watts can the 4 or 4 square wires carry?

Single-phase power is about 4.5A for 1KW and 36A for 8KW. The current carrying capacity of a 4-square wire (single plastic copper wire) is about 30A, which is smaller. Change to a 6-square wire (single-run power supply). Your meter and brake must be large. Do n’t need so much power, the minimum 4KW is also ok. How many kilowatts of electric power are consumed by a 4-square wire depends on whether you use 220v in your home or 380v in the factory. If the 4-square wire of 220 can load 6 to 8 kilowatts.

How many watts can five or 6 square wires carry?

There is no direct relationship between the number of kilowatts of power that a 6-square wire can carry and the power delivered. Generally 6 square meters of wire is more than enough for air conditioning. 10x6 + 1x4 cables are generally used for maintenance power on construction sites. As for the strength of the current, according to my construction experience, this cable is generally controlled by a 63A air switch. 6 square aluminum wires can carry 6 kilowatts and 6 square copper wires can carry 10 kilowatts.