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300mm2 cable diameter calculation

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  • Power Cable

    Power Cable

    Power cables are mainly used for power transmission and distribution purpose. It is an assembly of one or more individually insulated electrical conductors, usually held together with an overall sheath. The assembly is used for transmission and distribution of electrical power. Electrical power cables may be installed as permanent wiring within buildings, buried in the ground and run overhead or exposed.……Including: rubber cable, welding cable, URD cable, XLPE insulated power calbe etc.

  • Bare Overhead Conductor

    Bare Overhead Conductor

    Bare Overhead Conductors are used in overhead transmission and distribution network applications.They are also used for un-insulated hook ups, jumpers, grounding conductors and other applications. Our Conductors conform to ASTM, IEC, BS, BS EN and DIN standards.…… Including: AAC conductor, AAAC conductor, ACSR conductor, ACAR conductor, AACSR conductor, etc.

  • Aerial Bundled Cable

    Aerial Bundled Cable

    Aerial bundled cables (also aerial bundled conductors or simply ABC) are overhead power lines using several insulated phase conductors bundled tightly together, usually with a bare neutral conductor. Our abc calbe conform to ASTM, IEC, SANS standards.……Including: abc cables, cvered line wire, service drop wire etc.

    • 300mm2 cable diameter
    Working current and calculation:
     
    Calculation formula of working current of electric (cable) cable:
     
    single-phase
     
    I=P / (U * cos *)
     
    P- power (W); U- voltage (220V); Cos Phi – power factor (0.8); I- phase current (A)
     
    three-phase
     
    I=P / (U * 1.732 * cos phi)
    P- power (W); U- voltage (380V); cosΦ – power factor (0.8); I- phase current (A)
     
    General safety cross-sectional flow of copper wire is 5-8A/ mm, the safety section of the aluminum wire is 3-5A/ square mm.
     
    In single phase 220V circuit, the current of each 1KW power is about 4-5A, and the current of each 1KW power is about 2A in the three-phase load balance.
     
    That is, in a single phase circuit, each 1 square mm of copper wire can withstand 1KW power load; three-phase balance circuit can withstand the power of 2-2.5KW.
    300/3.14 open square, and then multiplied by 2, the diameter is 19.54mm.

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