Does the armored network cable need to be grounded?

　　The necessity and reasons for grounding the armored network cable are as follows:

　　First, the necessity

　　During the design and installation process of armored network cables, in order to ensure their safety and stability, grounding treatment is usually required. Grounding can effectively reduce the grounding resistance, increase the fault current, and enable the protection device to operate more reliably, thus ensuring the safety of personnel and equipment.

　　II. Reasons

　　Safety Considerations: When cable insulation is damaged, the armor layer may be electrically charged. If there is no ground at this time, a person may experience an electric shock accident when touching the charged armor layer. Grounding can quickly introduce the charge into the earth, avoiding the risk of electric shock.

　　Prevent discharge and burnout: In the case of unbalanced three-phase current, the armor layer may discharge due to the action of induced electromotive force, and may burn the protective layer in severe cases. Grounding can level the armor layer with the ground potential to prevent the occurrence of discharge phenomenon.

　　Improve system stability: Grounding can also improve the stability of the entire power system, reduce electromagnetic interference and noise, and ensure the quality of signal tranSMission.

　　III. Grounding method

　　The grounding method of the armored cable can be adjusted according to the type and purpose of the cable. For example:

　　Power cable: Usually the power cable armor is grounded at both ends to increase mechanical strength and prevent mechanical damage.

　　Control cable: The grounding of the control cable armor layer can be selected according to the specific situation, but usually single-ended grounding on the power side can ensure reliability.

　　Signal cable: The shielding layer of the signal cable is more complex to ground. The single shielded signal line is only grounded on the side of the control cabinet, the double shielded signal line is partially shielded on the side of the control cabinet, and the two ends of the total shield are grounded.

　　IV. Precautions

　　When grounding an armored cable, the following points need to be taken into account:

　　Protective measures: Installers need to take protective measures, including insulation measures, to prevent accidents.

　　Grounding resistance: Ensure that the grounding resistance meets the specification requirements to ensure reliable operation in the event of a fault.

　　Reliable connection: The grounding connection should be firm and reliable to avoid ground failure due to loosening or falling off.

　　In summary, the armored network cable needs to be grounded to ensure its safety and stability. During the grounding process, the appropriate grounding method should be selected according to the type and purpose of the cable, and attention should be paid to taking protective measures and ensuring that the grounding resistance meets the requirements.