Most of the disputes after the arrival of armored optical cables are not in the optical fiber itself, but in the handling of the metal parts inside the cable. The terminals on the metal reinforced core and armor layer need to go through three processes: fixation, insulation, and grounding. Each process has its own responsibilities. If any one is missed, it will leave hidden dangers.

Fixed: Strengthening core must be strengthened first

When welding in the ODF or wall box, the reinforcing core must first be fixed on the clamping position of the bracket, so that all the tensile force is borne by the reinforcing member, and the heat shrink protection point and buffer tube are not stressed. Steel wire reinforcement cores are generally locked with thread clamps or crimp rings; although glass fiber reinforced plastic reinforcement cores are not conductive, they still need to be clamped. This step is omitted. The gravity and external force of the entire cable section will be transmitted to the coated optical fiber with a diameter of less than 0.2 mm.

Insulation: parts that should not be live are accidentally touched.

Metal armor layers can induce voltages when they are close to electrical equipment or run parallel to strong current bridges over long distances. The incoming wire end should have the armor layer isolated from the frame through insulating gaskets, and should no longer contact the frame ground except for the lead-out ground wire to avoid accidental formation of a path. For power plant and station situations, please refer toCommunication transformation plan for electric power and new energy stations, the insulation and grounding locations are usually carried out according to the design document requirements.

Grounding: Single point grounding recommended

EB-LINK recommends single-point grounding on the equipment side according to common engineering practices:Armored pigtailThe metal layer is led to the main grounding bar of the computer room with soft copper wire, and the other end is suspended and covered with an insulating cap. When two points are grounded at the same time, if there is a potential difference between the two ground points, a circulation will be formed in the armor layer, which will not only generate heat but may also interfere with low-speed signals. It is necessary to draw a clear boundary: the armor layer is grounded to discharge induced electricity and static electricity, and lightning protection still relies on the discharge tube and grounding device at the incoming line.

The reinforced core is firmly fixed, and only one insulation and grounding point of the insulation are left. After the three processes are completed, the armored optical cable can be truly implemented.