Thhn Wire Insulation Specifications

Thhn wire is typically two conductor and found in the familiar romex style cabling that laces all homes and other structures.

Thhn wire insulation specifications.

Simpull technology for easier pulling. Thhn stands for thermoplastic high heat nylon which is a description of the wire jacket and insulation components. Because the insulation is thinner it can often cause a current leakage or even a breakdown during environmental or chemical exposures. Insulation type voltage rating dielectric constant temperature rating resistance to leakage current flexibility and.

The jacket on the thhn family is thinner this means that while more thhn can be fit through many obstacles its jacket doesn t offer as much protection as the xhhw jacket. Thhn wire is the original version of the dual rated cable. There are a few factors that set xhhw 2 apart from thhn thwn 2. Also rated mtw and awm see below.

The insulation on stranded sizes shall also comply with ul requirements for 105 c appliance wiring material. Flame rated vw 1 wire meets requirements for preventing the spread of flames based on a timed test with vertically suspended material. Wire type thhn type thhn wire part number insulation color gauge description spool reel length approx. In addition to the specifications noted above the main difference between thhn thwn thwn 2 and xhhw xhhw 2 and is in the wire s jacket.

Thermoplastic insulation nylon sheath heat moisture gasoline and oil resistant ii. Thhn wire is a very popular type of building wire used in all types of industrial commercial and residential construction. Thermoplastic and thermoset are two common types of cable insulation and it s important to understand the strengths and weaknesses of each when designing and building a new facility machine or appliance. This type of building wire is effective in damp and dry locations.

Types thwn or thhn shall comply with the optional gasoline and oil resistantii rating of ul standard 83. Wire with a nylon outer insulation resists oil and water. All sizes rated both thhn and either thwn sizes 14 12 and 10 awg or thwn 2 sizes 8 awg and larger. 4 2 the average thickness ofpvc insulation for agiven conductor size shall be as specified in ul standard 83 for types thwn orthhn.

Wire and jacket insulation. Weight price thhn14bk black 14awg type thhn wire bare copper 19 strands 600 volts 500 7 8 lbs 48 50 thhn14wh white 48 50 thhn14rd red 48 50 thhn14bl blue 48 50 thhn14gn green 48 50 thhn14yl yellow 48 50 thhn14or orange 48 50.