In daily sales, many customers ask me how much square meter of wire is needed for this electric heating tube to be used. Today, we will use physical formulas to convert and tell you how much square meter of wire is needed for a high-power heating tube to load:

At a voltage of 220 volts, a current of 1000 watts is approximately 3.966 amperes, taking 4 amperes

At a voltage of 380 volts, a current of 1000 watts is approximately 1.998 amperes, taking 2 amperes

As long as it is a copper core wire, each square millimeter of cross-sectional area can safely pass the rated current of 4-5A; In a 220V single-phase circuit, for every 1KW of power, the current is about 4.5A. In a 380V three-phase balanced circuit, for every 1KW of power, the current is about 2A. These values can be calculated using physical formulas and the results are very close. Therefore, electricians need to remember these "complicated" calculation formulas in their work. According to this algorithm, it is known that for every 1 square millimeter of cross-sectional area of copper core wire, If used in a 220V single-phase circuit, it can safely carry the current passing through a 1KW load. If used in a three-phase balanced load (such as an electric motor) circuit, it can safely carry the current passing through a 2.5KW load

1. Uneven hardness of the resistance wire material of the electric heating tube

2. Improper design of resistance wires for electric heating tubes

The electric heating wires in general electric heating tubes are designed in a spiral shape, that is, a spring shape. If the ratio of the diameter D of the wire core rod to the diameter d of the electric heating wire is D/d>8, sagging phenomenon will occur when adding powder, which is due to the sparse distance between the electric heating wire coils.

3. Inappropriate process operation of electric heating tubes

4. The electric heating tube powder adding equipment has defects