Cable types such as Power Limited Tray Cable (PLTC) must be mounted in cable tray with listed fittings to meet the requirements. Cable Trays have been permitted in the hazardous (classified) locations in the National Electrical Code for Class I (flammable vapor and gases) since the 1978 NEC and have been used extensively in chemical plants, refineries, and other types of facilities. This article is about code requirements. Let's break down what you need to know about explosion-proof requirements for cable trays in these environments, keeping it simple and clear. Chemical plants have risks like explosive gases, dusts, or vapors. It's serious business – around 15% of chemical plant explosions happen because of. Basically, there are three techniques to avoid a fire or explosion: containment (explosion proof enclosures and fittings), segregation (purge and pressurization of enclosures), and prevention (intrinsically safe and nonincendive circuit designs). The golden rule: Shortest path with maximum protection. Safety of such devices is usually ensured by the use of one or several ignition protection types which are clearly. Type PLTC or PLTC-ER cables installed in accordance with Article 725 including cable trays. Optical fiber cable types (OFN, OFC.
