NEC & CSA Designations

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NEC
Wire
Type
Description
AWM Appliance wiring material, thermoplastic insulation (PVC), with or without Nylon, 105°C, dry locations
MV-HL Suffix "-HL" indicates acceptable for hazardous locations
ITC Instrumentation tray cable, several combinations for insulations and jacket compounds
MV-LS Suffix "-LS" indicates acceptable for limited smoke applications
MC Metal clad cable, THHN or XHHW individual conductors, aluminum or steel interlocked armor
MTW Machine tool wire, thermoplastic insulation (PVC), with or without Nylon, 90°C, dry locations
MV-90 Medium voltage cable rated at 90°C
MV-105 Medium voltage cable rated at 105°C
PLTC Power-limited tray cable, several combinations of insulations and jacket compounds
RHH Rubber equivalent insulation (XLPE), high heat resistant 90°C rating, dry or damp locations
RHW-2 Rubber equivalent insulation (XLPE), heat resistant 90°C rating, wet locations
SF-2 Silicone insulated fixture wire, solid or 7-strand
SFF-2 Silicone insulated fixture wire, flexible strand
SIS Flame retardant thermoset switchboard wire
TC Tray cable, several combinations of insulation and jacket compounds, cable tray use
TFFN Thermoplastic insulation (PVC), flexible fixture wire, 90°C, dry locations, Nylon jacket
TFN Thermoplastic insulation (PVC), fixture wire, 90°C, dry locations, Nylon jacket
THHN Thermoplastic insulation (PVC), high heat resistant, 90°C rating, dry or damp locations, Nylon jacket
THWN Thermoplastic insulation (PVC), heat resistant 75°C rating, wet locations, Nylon jacket
THHN-2 Thermoplastic insulation (PVC), high heat resistant 90°C rating, wet and dry locations, Nylon jacket
USE-2 Underground service entrance, cross-linked polyethylene insulation (XLPE), direct burial, 90°C rating
XHHW-2 Cross-linked polyethylene insulation (XLPE), high heat resistant 90°C rating, wet and dry locations
CSA Wire Type Description
AC90 600 Volt XLPE insulation aluminum or steel interlocked armored cable
ACIC 300 or 600 Volt armored instrument and control cable. A CSA type designation used to describe armored instrumentation and control cable. Available in either 300 Volt or 600 Volt with thermoset or thermoplastic insulation, this cable can be supplied with an overall shield, shielded pairs, shielded triads or unshielded in multi-conductor constructions from 2 to 72 conductors. The overall interlocked armor and PVC jacket provide a (-40oC), HL, FT4 product (CDS reference standard C22.2 No. 239)
ACWU90 (-40°C) 600 Volt XLPE insulation aluminum or steel interlocked armored cable with PVC jacket
HL Designation for hazardous locations (CSA STD C22.2 NO174)
NMD90 300 Volt non-metallic sheath cable with XLPE or PVC/Nylon insulation
NMWU 300 Volt non-metallic sheath cable with PVC insulation
RA90 (-40°C) 600 and 5000 Volt single and multiple conductor with seamless corrugated aluminum armor. A CSA type destination for single conductor of multi-conductor constructions similar to AC90 and ACWU90 except no bonding (grounding) conductor is required in the cable assembly. Also, the armor is a corrugated aluminum sheath that serves as a bonding (grounding) conductor. The overall PVC covering on RA90 is required for wet or direct burial applications (CSA reference standard C22.2 No. 123)
RW90 XLPE (-40°C) 600 and 5000 Volt thermoset insulation 90°C wet or dry locations
RWU90 XLPE (-40°C) 600 and 1000 Volt thermoset insulation 90°C direct burial
SEW-2 600 Volt silicone rubber insulated equipment wire solid or 7-strand
SEWF-2 600 Volt silicone rubber insulated equipment wire with flexible strand
TECK90 (-40°C) 600 and 5000 Volt single and multiple conductor cable with inner jacket, aluminum or steel interlocked armor with PVC jacket
TC Tray cable certified for use in Class I Division 2 areas
TW75 600 Volt thermoplastic (PVC) insulated cable suitable for wet locations
TWU (-40°C) 600 Volt thermoplastic (PVC) insulated cable suitable for direct burial