Alflex-Type RWA 3/4-Inch Reduced Wall Aluminum Flexible Metal Conduit. High Strength Aluminum Alloy Strip. 5/16-Inch is UL Recognized Component. UL Listed in sizes 3/8-Inch to 3-Inch. 600-Volt. Alflex Type RWA is manufactured with a lightweight, high strength aluminum alloy. UL Listed per UL 1, Standard for Safety for Flexible Metal Conduit, ANSI/UL-1. Meets federal specification WW-C-566c. NEC Type Designation-Article 348, Type FMC flexible metal conduit. Alflex Type RWA Reduced Wall Aluminum Flexible Metal Conduit is suitable for the following installations: Environmental air-handling spaces per NEC 300.22C, 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 2008 NEC 250.1185, Electric signs and outline lighting per NEC 600.7, 600.31 1000-Volt or less, and 600.32 >1000-Volt, Hazardous location, Class 1, Div. 2, for flexible connectors only per 2008 NEC 501.10B2 and 501.30B, UL 1, 2, and 3 Hour Through-Penetration Firestop Systems: C-AJ-1462, C-AJ-1463, C-AJ-1464, W-L-1308, and W-L-1309, Listed wired fixtures per NEC 410.77C, Raised floors for connection of information technology per NEC 645.5D2 and 645.5D, Places of assembly and theaters per NEC Articles 518 and 520, Cranes and hoists per NEC 610.11C.