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Cable tray wire, or tray cable, is rated and approved for installation in raceways and cable trays. The cable is made of individual conductors covered with armor for insulation and a jacket that can withstand abrasion. Because tray cables pass strict crush and impact tests, they do not require conduit and can leave cable tray or raceways up to six feet, as long as they are secured and supported. Tray cables can be rated for indoor and outdoor use, and hazardous and corrosive areas. 

MTW wire (Machine Tool Wire) consists of stranded, bare copper conductors insulated with polyvinyl chloride (PVC). The stranding gives the wire more flexibility for routing in tight spaces such as electrical cabinets. MTW wire has corrosion protection and is resistant to moisture, heat, oil and gasoline. It is rated up to 600 V and 105 degrees Celsius.

MTW/TEW wire (Thermoplastic Equipment Wire) is made with tinned, stranded copper wires instead of bare copper. The bare copper MTW wire is more cost-effective, however, the tinned copper assists in the soldering process during installation and helps to defend against corrosion.

THHN wire (Thermoplastic High Heat-resistant Nylon) consists of a stranded or solid, bare copper or aluminum conductor with a thermoplastic insulation and a nylon jacket. THHN is a building wire usually used to carry electricity to external power sources. It is rated up to 600 V and 90 degrees Celsius in dry locations, 75 degrees Celsius in wet locations.

THWN-2 wire (Thermoplastic Heat and Water-resistant Nylon) have added water-resistance protection which allows it to be installed outdoors and in conduit where THHN wire cannot. THWN-2 wire has a maximum temperature of 90 degrees Celsius in both dry and wet locations.
 

Subcategories

Cable Tray Wire
MTW Wire
TFFN Wire
THHN Wire

Products

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MTW 18WHITE-Blue Stripe 500ft
MTW 18WHITE-Blue Stripe 500ft
$143.50
Southwire MTW 18 gauge white wire with blue stripe 500' roll. 26 strand bare, annealed copper class C stranding with Color-coded, Polyvinyl Chloride (PVC) heat- and moisture resistant, flame-retardant compound per UL 1063 and UL 83. Primarily used in control cabinets, in machine tool applications and appliance wiring applications at temperatures -25°C to 90°C. They comply with the National Electrical Code (NEC) and NFPA Standard 79. Voltage rating for all applications is 600 volts.
MTW 16WHITE-Blue Stripe 500ft
MTW 16WHITE-Blue Stripe 500ft
$208.34
Southwire MTW 16 gauge white wire 500' roll. 26 strand bare, annealed copper class C stranding with Color-coded, Polyvinyl Chloride (PVC) heat- and moisture resistant, flame-retardant compound per UL 1063 and UL 83. Primarily used in control cabinets, in machine tool applications and appliance wiring applications at temperatures -25°C to 90°C. They comply with the National Electrical Code (NEC) and NFPA Standard 79. Voltage rating for all applications is 600 volts.
MTW 14WHITE-Blue Stripe 500ft
MTW 14WHITE-Blue Stripe 500ft
$256.66
Southwire MTW 14 gauge white with blue stripe wire 500' roll. 19 strand bare, annealed copper class C stranding with Color-coded, Polyvinyl Chloride (PVC) heat- and moisture resistant, flame-retardant compound per UL 1063 and UL 83. Primarily used in control cabinets, in machine tool applications and appliance wiring applications at temperatures -25°C to 90°C. They comply with the National Electrical Code (NEC) and NFPA Standard 79. Voltage rating for all applications is 600 volts.
TFFN 18STRYELLOW 500ft
TFFN 18STRYELLOW 500ft
$99.70
Southwire TFFN 18 gauge stranded yellow wire 500' roll. Max 600VAC, 6 Amp with PVC inslulation and Nylon jacket .085" diamater rated at 194 F. Annealed copper class C stranding with Color-coded, Polyvinyl Chloride (PVC) heat- and moisture resistant, flame-retardant compound per UL 1063 and UL 83.
TFFN 18STRWHITE 500ft
TFFN 18STRWHITE 500ft
$99.70
Southwire TFFN 18 gauge stranded white wire 500' roll. Max 600VAC, 6 Amp with PVC inslulation and Nylon jacket .085" diamater rated at 194 F. Annealed copper class C stranding with Color-coded, Polyvinyl Chloride (PVC) heat- and moisture resistant, flame-retardant compound per UL 1063 and UL 83.
TFFN 18STRRED 500ft
TFFN 18STRRED 500ft
$99.70
Southwire TFFN 18 gauge stranded red wire 500' roll. Max 600VAC, 6 Amp with PVC inslulation and Nylon jacket .085" diamater rated at 194 F. Annealed copper class C stranding with Color-coded, Polyvinyl Chloride (PVC) heat- and moisture resistant, flame-retardant compound per UL 1063 and UL 83.
TFFN 18STRPURPLE 500ft
TFFN 18STRPURPLE 500ft
$99.70
Southwire TFFN 18 gauge stranded purple wire 500' roll. Max 600VAC, 6 Amp with PVC inslulation and Nylon jacket .085" diamater rated at 194 F. Annealed copper class C stranding with Color-coded, Polyvinyl Chloride (PVC) heat- and moisture resistant, flame-retardant compound per UL 1063 and UL 83.
TFFN 18STRORANGE 500ft
TFFN 18STRORANGE 500ft
$99.70
Southwire TFFN 18 gauge stranded orange wire 500' roll. Max 600VAC, 6 Amp with PVC inslulation and Nylon jacket .085" diamater rated at 194 F. Annealed copper class C stranding with Color-coded, Polyvinyl Chloride (PVC) heat- and moisture resistant, flame-retardant compound per UL 1063 and UL 83.
TFFN 18STRBROWN 500ft
TFFN 18STRBROWN 500ft
$99.70
Southwire TFFN 18 gauge stranded brown wire 500' roll. Max 600VAC, 6 Amp with PVC inslulation and Nylon jacket .085" diamater rated at 194 F. Annealed copper class C stranding with Color-coded, Polyvinyl Chloride (PVC) heat- and moisture resistant, flame-retardant compound per UL 1063 and UL 83.
TFFN 18STRBLUE 500ft
TFFN 18STRBLUE 500ft
$99.70
Southwire TFFN 18 gauge stranded blue wire 500' roll. Max 600VAC, 6 Amp with PVC inslulation and Nylon jacket .085" diamater rated at 194 F. Annealed copper class C stranding with Color-coded, Polyvinyl Chloride (PVC) heat- and moisture resistant, flame-retardant compound per UL 1063 and UL 83.
TFFN 18STRBLACK 500ft
TFFN 18STRBLACK 500ft
$99.70
Southwire TFFN 18 gauge stranded black wire 500' roll. Max 600VAC, 6 Amp with PVC inslulation and Nylon jacket .085" diamater rated at 194 F. Annealed copper class C stranding with Color-coded, Polyvinyl Chloride (PVC) heat- and moisture resistant, flame-retardant compound per UL 1063 and UL 83.
TFFN 16STRYELLOW 500ft
TFFN 16STRYELLOW 500ft
$139.60
Southwire TFFN 16 gauge stranded yellow wire 500' roll. Max 600VAC, 8 Amp with PVC inslulation and Nylon jacket .099" diamater rated at 194 F. Annealed copper class C stranding with Color-coded, Polyvinyl Chloride (PVC) heat- and moisture resistant, flame-retardant compound per UL 1063 and UL 83.

 

Thermoplastic, High Heat resistant, Nylon jacket insulation (THHN) wire is used in conduit or in cable trays due to its rigidity and tough insulation characteristics. THHN can be stranded (several small strands of wire grouped together), allowing for more flexibility and less chance of breakage, or solid (one wire), which is more durable and rigid. THHN wire is suitable for use in dry locations with temperatures that do not exceed 90 degrees Celsius.

Cross-linked polyethylene, High Heat-resistant, Water-resistant (XHHW) wire is very similar to THHN. The difference is that XHHW wire is overall a more durable wire that can withstand higher temperatures and is water resistant. XHHW wire can also be found in both stranded and solid wire options.

Machine Tool Wire (MTW) wire is much more flexible than THHN wire with insulation that is not as durable, making it a poor choice to run through conduit. The flexibility makes it ideal for winding through tight areas, such as wire ducting in an industrial control cabinet. MTW wire is almost exclusively found in stranded wire, which allows for much of the flexibility and reduces the chances of the wire breaking. MTW wire is intended for use in dry locations that do not exceed 90 degrees Celsius or wet locations that do not to exceed 60 degrees Celsius. 

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