Triaxial cable
（重定向自Triax）
![Triaxial BNC connector. Newer variants have three locking lugs rather than the two used here to prevent accidental interconnection with regular BNC connectors.](/Images/godic/202502/17/BNC_triax0755.jpg")
Triaxial cable, often referred to as triax for short, is a type of electrical cable similar to coaxial cable, but with the addition of an extra layer of insulation and a second conducting sheath. It provides greater bandwidth and rejection of interference than coax, but is more expensive.