NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
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NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
Author: Noyafa–CCTV Tester
Ensure the selection specification of low-voltage power cables Low-voltage power cables are the most widely used and the most used power cables. There are various types of power cables and many specifications. How to choose them according to the actual situation in our daily life? Today's line ensures the selection specification of low-voltage power cables. Low-voltage power cables are the most widely used and most used power cables. There are various types of power cables and many specifications. How to choose them according to the actual situation in our daily life? Today's cable takes you to understand the selection specifications of low-voltage power cables, so that you can make a correct judgment when selecting low-voltage power cables! The selection of the number of cores, in the three-phase circuit, when the low-voltage power cable manufacturer introduces that the maintenance line and the neutral line share the same conductor, choose a four-core cable, and when the grounding of the exposed conductor part of the power receiving equipment and the grounding of the power supply system are independent, choose four When the maintenance line and the neutral line are independent, choose a five-core cable and use it in a single-phase loop. When the same conductor is used for the maintenance line and the neutral line, choose a two-core cable. When the grounding of the exposed conductor of the power receiving equipment is independent of the grounding of the power supply system, choose a two-core cable. When the maintenance line and the neutral line are independent, choose a two-core cable. 2. Selection of conductors for three-core cables. The temperature of the cable conductor under the effect of working current shall not exceed the specified value of the specification, the temperature of the cable conductor under the effect of short-circuit current and short-circuit time shall not exceed the specified value of the specification, and the voltage drop of the connecting circuit under the effect of working current shall not exceed the allowable value of the circuit , the current carrying capacity of the conductor shall not be lower than the maximum value required for the operation of the system.
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