Both the National Electrical Code (NEC) and the National Fuel Gas Code (NFPA 54) generally require a minimum horizontal separation of 12 inches (one foot) between underground electrical service raceways and gas service lines when they run parallel. Cable tray spacing is a critical aspect of electrical infrastructure, influencing both safety and efficiency. Cable trays are a safe, durable, and cost-effective method of cable management for commercial and industrial applications. The three main types of cable tray are: Perforated Cable Trays. These. us-trations without notice. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned. Mandatory separation distances between electrical components and gas lines are governed by national and local codes prioritizing public safety. These regulations minimize potential hazards that arise when the two utility systems are in close proximity during new construction or renovation. Adhering. The National Electrical Manufacturers Association (NEMA) also publishes three consensus standards that apply to the proper manufacture and installation of cable trays: ANSI/NEMA-VE 1-1998, Metal Cable Tray Systems; NEMA-VE 2-1996, Metal Cable Tray Installation Guidelines; and NEMA-FG-1998. Are there any guidelines regarding the horizontal distance of gas installation and surface-mounted electrical installation in cable trays? It is about the distances that should be kept between these strings Personally, I have not heard of such a thing, but it does not mean that there is no such.