{"product_id":"thhncu-generic-tffn18strgry500r-tffn-18-awg-wire-500ft","title":"Thhncu-generic tffn18strgry500r Tffn 18 Awg Wire 500ft","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe THHNCU-GENERIC tffn18strgry500r is a single-conductor TFFN-rated wire built for low-voltage control and fixture wiring in dry environments. The conductor is 16-strand, fully annealed bare copper at 18 AWG, insulated with PVC and a nylon jacket for abrasion resistance. Rated at 600 volts and 90 degrees C in dry conditions, this wire meets the TFFN designation requirements for use in conduit, raceways, and fixture wiring applications. The 500-foot spool format suits both shop stock and field installation work. Licensed electricians and HVAC technicians are the primary installers.\u003c\/p\u003e\u003cp\u003eTFFN 18 AWG wire is widely used in residential and light commercial electrical and HVAC control wiring. Common applications include fixture whips, motor control circuits, low-voltage branch circuits in conduit, and general-purpose wiring in dry indoor locations. The gray insulation color supports color-coded wiring schemes and is easy to identify in multi-conductor installations. The 500-foot spool length is practical for panel rooms, equipment rooms, and conduit pulls where moderate wire quantities are needed.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e18 AWG fully annealed bare copper conductor with 16-strand construction for flexibility\u003c\/li\u003e\n\u003cli\u003ePVC insulation with nylon jacket — TFFN-rated for dry locations\u003c\/li\u003e\n\u003cli\u003e600-volt rating suitable for standard branch circuit and control wiring\u003c\/li\u003e\n\u003cli\u003e90 degrees C dry temperature rating for warm equipment environments\u003c\/li\u003e\n\u003cli\u003eGray insulation for color-coded wiring identification\u003c\/li\u003e\n\u003cli\u003e500-foot spool minimizes splices on longer conduit runs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in conduit, raceways, and listed fixture assemblies where TFFN or THHN single-conductor wire is specified for dry locations at 600 volts or less.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation must be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize all circuits before terminating or splicing conductors. TFFN wire is rated for dry locations only — do not install in wet or damp locations without a wire type rated for those conditions. Use appropriate conduit fill calculations per NEC Article 310 when pulling multiple conductors through a single raceway.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConductor Material\u003c\/strong\u003e: Fully Annealed Bare Copper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConductor Size\u003c\/strong\u003e: 18 AWG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStranding\u003c\/strong\u003e: 16 Strand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Conductors\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsulation Material\u003c\/strong\u003e: PVC with Nylon Jacket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWire Type\u003c\/strong\u003e: TFFN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Rating\u003c\/strong\u003e: 600 volts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Rating\u003c\/strong\u003e: 90 degrees C (Dry)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsulation Color\u003c\/strong\u003e: Gray\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Diameter\u003c\/strong\u003e: 85 mil (0.085 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpool Length\u003c\/strong\u003e: 500 feet\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: THHNCU-GENERIC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: tffn18strgry500r\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"THHNCU-GENERIC","offers":[{"title":"Default Title","offer_id":51267934912818,"sku":"TFFN18STRGRY500R","price":148.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/308908816.jpg?v=1780694876","url":"https:\/\/voomisupply.com\/products\/thhncu-generic-tffn18strgry500r-tffn-18-awg-wire-500ft","provider":"Voomi Supply","version":"1.0","type":"link"}