LSZH railway cables are becoming more common.
Do you need LSZH railway cables?
Low smoke zero halogen materials do not emit toxic or corrosive fumes when subject to high heat or fire. This feature makes LSZH cables and cords desirable for applications in the passenger compartments of railway cars. It is also a useful feature when railroads are run through tunnels.
“It is also used extensively in the railroad industry, wherever high voltage or track signal wires must be run into and through underground tunnel systems.”