Nonmetallic-sheathed Cable (NM-B):
600 Volt Building Wire Copper Conductors with 90 C THHN Insulation Paper Sheath separates conductors from color coded PVC Jacket
Application
Type NM-B (Non-metallic sheathed cable) has a broad range of usage as defined in Article 334 of the National Electrical Code (NEC). Colonial NM-B (Non-Metallic Sheathed Cable) is commonly used for residential wiring. Colonial NM-B is used for dry locations at temperatures not to exceed 90 C (with ampacity limited to that for 60 C conductors) as defined in article 334 of the National Electrical Code. Colonial NM-B is rated 600 volts. Colonial NM-B may be installed or run in air voids and joints in masonry block or tile walls that are not exposed to moisture or dampness