Galflex® Type RWS (Reduced Wall Steel) Flexible Metal Conduit is suitable for the following installations: Environmental air-handling spaces per NEC® 300.22(C) Power and lighting branch circuit conductors and cables for connecting receptacles, luminaires, equipment, office partitions, etc. Metal raceway for wires and cables per NEC® (ANSI/NFPA-70) Article 348 Motor feeder, branch, and control circuit conductors and cables Class 1, Class 2, Class 3 Remote-control, signaling, and power-limited circuit conductors and cables Fire alarm system conductors and cables of power-limited or non-power-limited fire alarm circuits Voice, data, communications and video cables including CATV and optical fiber cables Concealed or exposed installations per NEC® Article 348 and the applicable NEC® provisions Elevators, hoistways, and escalators per NEC® 620.21 As a grounding conductor for lengths up to 6 feet (20A max) as per 2005 NEC® 250.118(5) Electric signs and outline lighting per NEC® 600.7, 600.31 (1000 volts or less), and 600.32 (>1000 volts) Hazardous location, Class 1, Div. 2, for flexible connectors only per 2005 NEC® 501.10(B)(2) & 501.30(B) UL 1, 2, & 3 Hour Through-Penetration Firestop Sytems: C-AJ-1462, C-AJ-1463, C-AJ-1464, W-L-1308, and W-L-1309. Specifications: UL Listed per UL 1, Standard for Safety for Flexible Metal Conduit, ANSI/UL-1 for 3/8 through 3. CSA Listed per CSA 22.2 No. 56 per Canadian Electrical Code C22.1 Section 12-1000 for 5/16 and 3/8 trade sizes only. Meets federal specification WW-C-566c. NEC Type Designation - Article 348, Type FMC (flexible metal conduit). Construction: Galflex® Type RWS is manufactured with a galvanized, corrosion resistant, high strength steel alloy. The metal strip is helically formed into a continuously interlocked flexible metal conduit that can withstand impact and crushing forces.