Armored cable is a layer of steel tape or steel wire that can be bent inside the outer sheath of the cable. Armor is divided into steel tape armor, thin steel wire armor, thick steel wire armor, non-magnetic stainless steel steel tape armor, etc. Armor is divided into steel tape armor (22, 23), fine steel wire armor (32, 33) , thick steel wire armor (42,43). Two Arabic numerals in the model, the first: "3" indicates fine steel wire armor; the second: "2" indicates PVC sheath, "3" indicates polyethylene sheath.

Shielded cable refers to a cable that can shield magnetic interference and other protective and transmission functions, and uses a mesh braided wire to wrap the signal wire. Generally represented by the letter "P". Ordinary shielded wire is mainly composed of insulation layer + shielding layer + wire; advanced shielded wire is mainly composed of insulation layer + shielding layer + signal wire + shielding layer grounding wire.

1. Different functions

The armored cable mechanical protection layer can be added to any structure of the cable to increase the mechanical strength of the cable, improve the anti-erosion ability, beware of mice and termites biting, and will not cause power transmission problems through the armor. Wire and cable designed for damaged and highly eroded areas. The screen shielding is to ensure the transmission performance of the system in the environment of electromagnetic interference. The anti-interference here should include two aspects, that is, the ability to resist external electromagnetic interference and the ability of the system itself to radiate electromagnetic interference. The roles played by the two are different and cannot be interchanged.

2. Different classification

3. Different bending radius

The cable allows small bending radius: the metal tape wraps the shield or steel wire, the steel tape armored cable is not less than 12 times the outer diameter of the cable, and the non-armored flexible cable or the braided shielded cable is not less than 6 times the outer diameter of the cable.

4. Different scope of application

Armored cables are mostly used in environments that are easily damaged by strong mechanical external forces and surrounded by corrosive gases, especially in mountainous and rocky areas. Shielding is to ensure the transmission performance of the system in the environment of electromagnetic interference. The anti-interference here should include two aspects, that is, the ability to resist external electromagnetic interference and the ability of the system itself to radiate electromagnetic interference.

5. Different grounding methods