A. Fine coaxial cable B. Unshielded twisted pair C. Multimode fiber D. Microwave antenna more
If it is three-phase 2.5 square single-phase 4 square, enough Le, said copper wire
audio and video cable disconnected or plug is not plugged in, the wrong hole
Single-phase copper wire 4 - 6 square can, aluminum 6 ---- 8 square. Three-phase copper 2 square aluminum 2.5 square can be. Wire: the wire is made of one or several soft wires, the outer package is soft and soft; the cable is made of one or several insulated packets, and the outer layer is covered with a tough outer layer of metal or rubber. Cables and wires are generally made up of three parts: the core wire, the insulating sheath, and the protective sheath. Commonly used cable features are as follows: CEF - EPR insulated neoprene jacket, marine flame retardant power cable. CVV - PVC insulated, PVC sheathed marine flame retardant power cable. OVC cable commonly used BV, BX, RV, RVV series of wires, including: BV - copper core PVC insulated wire, long-term allowable temperature 65 ℃, the minimum temperature -15 ℃, working voltage AC 500V, DC 1000V, fixed laying In the room, the outside can be deposited can also be deposited. BX - copper core rubber insulated wire, the maximum temperature of 65 ℃, apply to the room. RV - PVC insulated single-core cord, the maximum temperature of 65 ℃, the lowest temperature -15 ℃, 250V AC voltage, DC 500V, for the internal wiring equipment and equipment. RVV - Copper core PVC insulated and sheathed flexible wire, allowing long-term working temperature of 105 ℃, working voltage AC 500V, DC 1000V, for wet, mechanical protection requirements, often moving and bending occasions.
