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This category covers thermoplastic-insulated wire. It is rated 600 V, and certified in sizes 0.5 through 1000 sq mm copper, copper clad-aluminum, or aluminum.

The cable complies with all the requirements specified in UL 83, "Thermoplastic-insulated Wires and Cables," except that metric conductor sizes are used instead of AWG/kcmil sizes. This cable is for use in jurisdictions where metric conductor sizes are required or permitted.

Thermoplastic-insulated wire is designated as follows:

TW，THHN，THW，THW-2，THWN

TW — Indicates a single conductor having flame-retardant, moisture-resistant thermoplastic insulation. The wire is rated 60°C wet or dry.

THHN — Indicates a single conductor having flame-retardant and heat-resistant thermoplastic insulation with a jacket of extruded nylon or equivalent material. The wire is rated 90°C dry.

THW — Indicates a single conductor having flame-retardant, moisture- and heat-resistant thermoplastic insulation. The wire is rated 75°C wet or dry.

THW-2 — Same as THW except that the wire is rated 90°C wet or dry.

THHW — Indicates a single conductor having flame-retardant, moisture- and heat-resistant thermoplastic insulation. The wire is rated 90°C dry and 75°C wet.

THWN — Indicates a single conductor having flame-retardant, moisture- and heat-resistant thermoplastic insulation with a jacket of extruded nylon or equivalent material. The wire is rated 75°C wet or dry. THWN wire suitable for exposure to mineral oil and to liquid gasoline and gasoline vapors at ordinary ambient temperature is marked "GR I" if suitable for exposure to mineral oil at 60°C, or "GR II" if the compound is suitable for exposure to mineral oil at 75°C. Gasoline-resistant wire has been tested at 23°C when immersed in gasoline. It is considered inherently resistant to gasoline vapors within the limits of the temperature rating.

THWN-2 — Same as THWN except that the wire is rated 90°C wet or dry.

優(yōu)爾檢測華南檢測中心位于惠州市博羅縣石灣鎮(zhèn)滘源路滘嚇馮屋草州A棟和C棟，實驗室和辦公用地：４５００平方米，總投資3000多萬，擁有儀器設(shè)備５００余套。依據(jù)全球標準對電線電纜及橡塑化工材料在阻燃、耐火、低煙、無鹵、環(huán)保(RoHS, Reach,CP65等)、可靠性、物理、電氣特性方面的要求而建立，并在全球各大認證機構(gòu)(UL、VDE、CCC、IMQ、 TUV-RHEINLAND、TUV-SUD、CSA、BASEC、KEMA、PSE、KC、TLC、ETC、GRL、ANAbbb、EAC)和廣大客戶的認可和支持下，我們熱誠服務(wù)于來自全球的10000多家終端、電線電纜及材料相關(guān)客戶。優(yōu)爾檢測華南檢測中心擁有全球特種燃燒測試中心，依全球各國標準建立，是中國電線電纜大型燃燒和耐火測試種類最全的實驗室之一，僅燃燒測試場地就達1000多平方，檢測范圍如下：

1.適用于美國UL/加拿大CSA標準產(chǎn)品:如網(wǎng)線UL444/光纜UL1651/功率線UL13//火災(zāi)報警線UL1424/天線UL1655/電力電纜/控制電纜/中壓電纜/鎧裝電纜

對應(yīng)的大規(guī)模燃燒等級:

(1)通用級，垂直托盤成束燃燒，如CM UL1685/FT4;

(2)美國UL R級UL1666，如CMR;美國UL P級NFPA262.如CMP;

(3)加拿大CSA FT4級,FT6級大規(guī)模燃燒;

2.歐洲建筑法規(guī)強制指令CPR EN50399標準,Bca,Cca,Dca,Eca等級全項測試，國標GB 31247,GB/T31248,B1,B2,B3等級全項測試，如成束燃燒熱釋放量、煙密度等

3.國標GB18380及IEC60332-3線纜成束燃燒 A F/R,A,B,C,D級成束燃燒

4.英國耐火線纜BS6387和BS8491,GB/T 19666(N,N J,NS)

5.美國VW-1/IEC60332-1-2/歐洲EN60332-1-2/中國GB/T18380.12單根垂直燃燒

6.橡塑材料UL94/國標GB/T 8815阻燃測試

7.氧指數(shù)、鹵酸氣體、無鹵、針焰、灼熱絲、熱絲引燃、耐電起痕、耐氨、導(dǎo)電率/PH值等測試

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