Fiber optic cables themselves are not electrified. Fiber optics transmit optical signals, not electrical signals; their core materials are glass or plastic fibers, which are not conductive. Technically, fiber optics transmit light pulses through total internal reflection, completely independent of current. However, in practical applications, the following should be noted:
1. If the fiber optic sheath contains metal reinforcement (such as armored fiber), accidental contact with live equipment may cause the metal parts to become electrified;
2. The circuitry at the connection port of the photoelectric converter may become electrified, but the fiber optic portion will maintain its insulation properties.
According to the international standard IEC 60793-1, the insulation resistance of communication optical fibers must be ≥1000 MΩ·km. In engineering applications, the insulation properties of fiber optics make them particularly suitable for high-voltage environments (such as substation monitoring) and explosion-proof scenarios; however, during construction, parallel laying with power lines should still be avoided to prevent mechanical damage that could cause accidental electrification of metal components.
