250-37 SD CU SIMpull (TM) THHN-THWN-2 MTW RED
Application & Features
Southwire SIMpull® THHN/THWN-2 copper conductors are primarily used in conduit and cable trays for services, feeders, and branch circuits in commercial or industrial applications as specified in the National Electrical Code® and other applicable codes and standards. Voltage for all applications is 600 volts. SIMpull® THHN/THWN-2 copper conductors are designed to be installed without the application of a pulling lubricant. These conductors have multiple ratings depending upon the product application. Allowable temperatures are as follows:
- THHN or T90 Nylon- Dry locations not to exceed 90°C
- THWN-2- Wet or dry locations not to exceed 90° C or locations not to exceed 75°C when exposed to oil
- TWN75- Wet locations not to exceed 75°C
- MTW- Wet locations or when exposed to oil at temperatures not to exceed 60°C or dry locations not to exceed 90°C (with ampacity limited to that for 75°C conductor temperature per NFPA 79)
- AWM- Dry locations not to exceed 105°C only when rated and used as appliance wiring material
FEATURES
- Sunlight resistant #8 AWG and larger
- Gasoline and Oil Resistant II
- CT Rated 1/0 AWG and Larger
- VW-1 All Sizes
- FT-1 All Sizes
- AWM- Sizes 14 through 6 AWG
- MTW- Stranded Constructions Only
- RoHS Compliant
- LEED v4.1 Materials & Resources Credit MRc6; PBT (Lead Content Below 300 ppm Threshold)
Specifications
| Cond. Size | 250 KCMIL 250 KCMIL | |
| Conductor Number | 1 1 | |
| Cond. Strands | 37 37 | |
| Diameter Over Conductor (in) (cm) | 0.558 1.42 | inch cm |
| Inner Layer Thickness (mils) (mm) | 62 1.57 | mils mm |
| Outer Layer Thickness (mils) (mm) | 9 0.23 | mils mm |
| Approx. OD (in) (cm) | 0.684 1.74 | inch cm |
| Copper Weight (lbs/1000') (kgs/km) | 771 1147 | lbs/1000' kgs/km |
| Approx. Weight (lbs/1000') (kgs/km) | 844 1256 | lbs/1000' kgs/km |
Standards & References
- ASTM B8 Concentric-Lay-Stranded Copper Conductors
- ASTM B787 19 Wire Combination Unilay-Stranded Copper Conductors
- UL 83 Thermoplastic Insulated Wires and Cables
- UL 758 Standard for Appliance Wiring Material
- UL 1063 Machine Tool Wiring (MTW)
- UL 1685 Vertical-Tray Fire Propagation and Smoke Release Test (1/0 and Larger)
- CSA C22.2 No. 75 Thermoplastic Insulated Wires and Cables
- ICEA S-95-658 (NEMA WC70) Power Cables Rated 2000 Volts or Less for the Distribution of Electrical Energy
- Federal Specification A-A-59544
- NMX-J-010-ANCE Thermoplastic insulated wires and cables
- NOM-063-SCFI Electrical Products – Conductors – Safety Requirements
Construction
- Conductor: Stranded sizes #8 AWG - 3/0 AWG use a combination-unilay stranded soft drawn bare copper per ASTM B787. Sizes 4/0 AWG and larger use compressed stranded bare copper per ASTM B8
- Insulation: Heat and moisture resistant PVC
- Sheath: Nylon jacket utilizing SIMpull Technology