Effective factors in choosing the type of cable

electrical installations and energy transmission and distribution systems need different types of wires and cables . Therefore, according to the characteristics of wire and cable and other structural factors, wire and cable are selected.

The effective factors in choosing the type of cable include the following:

• The maximum load capacity of the cable
• Allowed voltage
• Circuit protection
• Short circuit load
• Mechanical condition
• Environmental conditions
• Specified technical specifications

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-allowable Flow

The permissible current in the wire and cable determines the amount of current that can be tolerated in the wire and cable. To protect insulators, its maximum allowed current is considered. The allowed current passing through the cable is selected in such a way that the amount of heat in each point of the cable is selected according to the conductor.

Current tolerance also depends on environmental conditions. If the current passing through the wire and cable is more, eventually the heat in it will increase in the surrounding space and it will be different according to the way the cables are placed together. One of the important factors in the permissible current is the cross section of the Wire and cable. The permissible current of insulated wire, non-insulated wire, and double-coated wire and cable is different.

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-nominal Voltage

nominal voltage is the voltage for which the wire is designed and is specified in volts. The amount of nominal voltage depends on the type and thickness of the wire and cable coating .Rated current is another factor influencing the choice of cable type. Under certain conditions and without the equilibrium temperature of the conductor exceeding a certain value, it passes through the wire. Finally, the nominal current depends on the type and cross section of the conductor and the type of installation.

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-Allowable voltage drop

Allowed voltage drop is also considered for cable selection. Voltage drop can affect things such as discharge lamps, incandescent lamps, electrical equipment, motors and its types. The current carrying capacity of the cable is determined based on the allowable temperature of the insulation. The thermal factor is also directly related to the current carrying capacity. The current carrying capacity depends on the ambient temperature and the condition of the facilities. Voltage drop is also divided into low voltage drop and high voltage drop categories. More voltage drop is seen in cables with larger conductors

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-circuit protection

Circuit protection is another effective feature in choosing the type of cable. Circuit protection depends on the type of conductor and the type of insulation coating. The operating voltage capacity determines the highest applied voltage that the cable can withstand

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-Allowable short circuit Load

One of the effective factors in choosing the type of cable is short circuit circuit. In the structure of the cable, the mechanical ability is determined by default, and this amount must be the same or more than the short circuit.

Because it works well without mechanical stress after the cable short circuit occurs. The short circuit load is diverse according to different dimensions and sizes.

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