2-NORM TRAY TC-ER MTW: UL-listed tray cable for exposed runs, machine tools and wind turbines
An engineering guide to the cable that solves North American field wiring: UL listed to UL 1277 and 1063, TC-ER for exposed runs without conduit, WTTC at 1 000 V for wind turbines, MTW for machine tools per NFPA 79, FT4/IEEE bunched-cable flame rating and UL OIL RES I.
1. Reading the designation
2-NORM = dual standards (UL/CSA and IEC/VDE). TRAY = tray cable per UL 1277. TC-ER = Tray Cable – Exposed Run. MTW = Machine Tool Wire per UL 1063. ‘G’ = with GNYE; ‘x’ = without.
Standard constructions, 2 × 1 to 4 G 120 mm² (AWG 18 to 4/0).
Exposed run without conduit.
WTTC and AWM rating.
IEEE vertical-tray flame test.
2. Construction
| Pos. | Element | Material / form | Engineering function |
|---|---|---|---|
| 1 | Conductor | Bare Cu, fine-wire, IEC 60228 cl. 5 / UL 83 | Flexibility; AWG equivalents given for each size |
| 2 | Core insulation | PVC | 90 °C rating |
| 3 | Core marking | Black cores with white numerals; GNYE from 3 cores | DIN VDE 0293 |
| 4 | Protective conductor | GNYE core (‘G’) | ‘x’ versions without |
| 5 | Core assembly | Stranded in layers | Round geometry for connectors and glands |
| 6 | Outer sheath | Oil-resistant PVC, grey RAL 7001 | UL OIL RES I; UL wet approval 75 °C; FT4/IEEE |
3. Technical data
| Parameter | Value | Engineering note |
|---|---|---|
| Conductor | Bare copper strand, IEC 60228 class 5 / UL 83 | |
| Core insulation | PVC | |
| Core identification | Acc. to DIN VDE 0293: black cores with white numerals; G = with GNYE from 3 cores | |
| Stranding | Cores stranded in layers | |
| Outer sheath | PVC (oil-resistant) | |
| Sheath colour | Grey, RAL 7001 | |
| Rated voltage | 600 V (TC and MTW); 1 000 V (WTTC and AWM); IEC: 0.6/1 kV | Multiple voltage classes in one cable |
| Test voltage | 6 kV | |
| Conductor resistance | Acc. to IEC 60228 cl. 5 | |
| Min. bending radius fixed | 4 × d | |
| Min. bending radius moved | 13 × d | |
| Operating temp. fixed | −40 °C / +90 °C | |
| Operating temp. moved | −5 °C / +90 °C | |
| Burning behaviour | Flame-retardant acc. to IEC 60332-1, IEC 60332-3A and UL category FT4/IEEE | Bunched-cable rating: IEC 60332-3A and FT4/IEEE |
| Oil resistance | UL OIL RES I; acc. to UL 1277 and UL 1063 | Oil-resistant sheath |
| Water resistance | UL wet approval 75 °C | |
| Chemical resistance | Largely resistant to acids and bases | |
| Standards | UL 1277, UL 1063 (MTW), NEC 336.10(7) Class 1 Div. 2 per NEC Art. 336, 392, 501 | |
| Approvals | UL listed acc. to UL 1277 and 1063; UL/CSA recognised acc. to UL 10012 and 2587 | |
| TC-ER | Tray Cable – Exposed Run: open wiring between cable tray and industrial machine per NEC 336.10(7) | No conduit required for the exposed section |
| WTTC | Wind Turbine Tray Cable | 1 000 V rating for nacelle and tower wiring |
| MTW | Machine Tool Wire, acc. to UL 1063 | NFPA 79 compliant for machine wiring |
| Compliance | RoHS; 2014/35/EU Low Voltage Directive (CE); NFPA 79 2007 |
4. What each listing means
| Listing | Standard | Voltage | Scope | Why it matters |
|---|---|---|---|---|
| TC (Tray Cable) | UL 1277 | 600 V | Cable trays per NEC Art. 392 | Basic tray listing |
| TC-ER (Exposed Run) | NEC 336.10(7) | 600 V | Exposed run from tray to machine | No conduit needed for the last section |
| MTW (Machine Tool Wire) | UL 1063 | 600 V | Inside machine tools | NFPA 79 compliance |
| WTTC (Wind Turbine Tray Cable) | UL 1277 | 1 000 V | Wind-turbine tower and nacelle | Higher voltage for turbine applications |
| AWM (Appliance Wiring Material) | UL 10012/2587 | 1 000 V | Inside equipment | UL/CSA recognised |
| Class 1 Div. 2 | NEC Art. 501 | 600 V | Hazardous locations (abnormal gas/vapour) | No separate hazloc cable needed |
| IEC 0.6/1 kV | — | 0.6/1 kV | European installations | Dual-standard coverage |
5. Full dimension and weight tables
All 46 constructions are listed, grouped by cross-section with AWG equivalents. Bending radii are calculated from the nominal outer diameter (4 × d fixed, 13 × d moved).
| Dimension n × mm² | Version | Reference item no. | Outer Ø mm | Cu index kg/km | Weight kg/km | Min. bend fixed 4 × d mm | Min. bend moved 13 × d mm |
|---|---|---|---|---|---|---|---|
| 2 x 1 (AWG 18) | TC-ER / MTW / WTTC / AWM | 1003402 | 7.9 | 19.2 | 87.0 | 32 | 103 |
| 3 G 1 (AWG 18) | TC-ER / MTW / WTTC / AWM | 1003568 | 8.3 | 28.8 | 102.0 | 33 | 108 |
| 3 x 1 (AWG 18) | TC-ER / MTW / WTTC / AWM | 1005425 | 8.3 | 28.8 | 101.3 | 33 | 108 |
| 4 G 1 (AWG 18) | TC-ER / MTW / WTTC / AWM | 1004069 | 9.1 | 38.4 | 125.0 | 36 | 118 |
| 5 G 1 (AWG 18) | TC-ER / MTW / WTTC / AWM | 1004170 | 9.9 | 48.0 | 150.0 | 40 | 129 |
| 7 G 1 (AWG 18) | TC-ER / MTW / WTTC / AWM | 1004135 | 10.8 | 67.2 | 218.0 | 43 | 140 |
| 12 G 1 (AWG 18) | TC-ER / MTW / WTTC / AWM | 1004136 | 14.7 | 115.2 | 335.0 | 59 | 191 |
| 18 G 1 (AWG 18) | TC-ER / MTW / WTTC / AWM | 1004137 | 17.1 | 172.8 | 466.0 | 68 | 222 |
| 25 G 1 (AWG 18) | TC-ER / MTW / WTTC / AWM | 1004138 | 19.5 | 240.0 | 617.0 | 78 | 254 |
| 34 G 1 (AWG 18) | TC-ER / MTW / WTTC / AWM | 1004858 | 23.8 | 326.0 | 897.0 | 95 | 309 |
| Dimension n × mm² | Version | Reference item no. | Outer Ø mm | Cu index kg/km | Weight kg/km | Min. bend fixed 4 × d mm | Min. bend moved 13 × d mm |
|---|---|---|---|---|---|---|---|
| 2 x 1.5 (AWG 16) | TC-ER / MTW / WTTC / AWM | 1004139 | 8.6 | 28.8 | 106.0 | 34 | 112 |
| 3 G 1.5 (AWG 16) | TC-ER / MTW / WTTC / AWM | 1004140 | 9.1 | 43.2 | 127.0 | 36 | 118 |
| 4 G 1.5 (AWG 16) | TC-ER / MTW / WTTC / AWM | 1004141 | 9.9 | 57.6 | 155.0 | 40 | 129 |
| 5 G 1.5 (AWG 16) | TC-ER / MTW / WTTC / AWM | 1004142 | 10.8 | 72.0 | 187.0 | 43 | 140 |
| 7 G 1.5 (AWG 16) | TC-ER / MTW / WTTC / AWM | 1004143 | 11.8 | 100.8 | 272.0 | 47 | 153 |
| 8 G 1.5 (AWG 16) | TC-ER / MTW / WTTC / AWM | 1004374 | 14.6 | 115.2 | 357.0 | 58 | 190 |
| 12 G 1.5 (AWG 16) | TC-ER / MTW / WTTC / AWM | 1004144 | 16.1 | 172.8 | 421.0 | 64 | 209 |
| 18 G 1.5 (AWG 16) | TC-ER / MTW / WTTC / AWM | 1004145 | 18.8 | 259.2 | 594.0 | 75 | 244 |
| 25 G 1.5 (AWG 16) | TC-ER / MTW / WTTC / AWM | 1004146 | 22.6 | 360.0 | 847.0 | 90 | 294 |
| Dimension n × mm² | Version | Reference item no. | Outer Ø mm | Cu index kg/km | Weight kg/km | Min. bend fixed 4 × d mm | Min. bend moved 13 × d mm |
|---|---|---|---|---|---|---|---|
| 2 x 2.5 (AWG 14) | TC-ER / MTW / WTTC / AWM | 1004147 | 9.4 | 48.0 | 137.0 | 38 | 122 |
| 3 G 2.5 (AWG 14) | TC-ER / MTW / WTTC / AWM | 1004148 | 9.9 | 72.0 | 166.0 | 40 | 129 |
| 4 G 2.5 (AWG 14) | TC-ER / MTW / WTTC / AWM | 1004149 | 10.8 | 96.0 | 205.0 | 43 | 140 |
| 5 G 2.5 (AWG 14) | TC-ER / MTW / WTTC / AWM | 1004150 | 11.9 | 120.0 | 251.0 | 48 | 155 |
| 7 G 2.5 (AWG 14) | TC-ER / MTW / WTTC / AWM | 1004151 | 13.0 | 168.0 | 393.0 | 52 | 169 |
| 8 G 2.5 (AWG 14) | TC-ER / MTW / WTTC / AWM | 1004375 | 16.0 | 192.0 | 489.0 | 64 | 208 |
| 12 G 2.5 (AWG 14) | TC-ER / MTW / WTTC / AWM | 1004152 | 17.7 | 288.0 | 568.0 | 71 | 230 |
| 18 G 2.5 (AWG 14) | TC-ER / MTW / WTTC / AWM | 1004153 | 20.8 | 432.0 | 807.0 | 83 | 270 |
| Dimension n × mm² | Version | Reference item no. | Outer Ø mm | Cu index kg/km | Weight kg/km | Min. bend fixed 4 × d mm | Min. bend moved 13 × d mm |
|---|---|---|---|---|---|---|---|
| 3 G 4 (AWG 12) | TC-ER / MTW / WTTC / AWM | 1004154 | 11.3 | 115.2 | 231.0 | 45 | 147 |
| 4 G 4 (AWG 12) | TC-ER / MTW / WTTC / AWM | 1004155 | 12.4 | 153.6 | 290.0 | 50 | 161 |
| 5 G 4 (AWG 12) | TC-ER / MTW / WTTC / AWM | 1004156 | 14.4 | 192.0 | 379.0 | 58 | 187 |
| 7 G 4 (AWG 12) | TC-ER / MTW / WTTC / AWM | 1004157 | 15.7 | 268.8 | 550.0 | 63 | 204 |
| Dimension n × mm² | Version | Reference item no. | Outer Ø mm | Cu index kg/km | Weight kg/km | Min. bend fixed 4 × d mm | Min. bend moved 13 × d mm |
|---|---|---|---|---|---|---|---|
| 3 G 6 (AWG 10) | TC-ER / MTW / WTTC / AWM | 1004167 | 12.5 | 172.8 | 307.0 | 50 | 162 |
| 4 G 6 (AWG 10) | TC-ER / MTW / WTTC / AWM | 1004158 | 14.5 | 230.4 | 410.0 | 58 | 188 |
| 5 G 6 (AWG 10) | TC-ER / MTW / WTTC / AWM | 1004159 | 15.9 | 288.0 | 501.0 | 64 | 207 |
| Dimension n × mm² | Version | Reference item no. | Outer Ø mm | Cu index kg/km | Weight kg/km | Min. bend fixed 4 × d mm | Min. bend moved 13 × d mm |
|---|---|---|---|---|---|---|---|
| 3 G 10 (AWG 8) | TC-ER / MTW / WTTC / AWM | 1004168 | 17.0 | 288.0 | 543.0 | 68 | 221 |
| 4 G 10 (AWG 8) | TC-ER / MTW / WTTC / AWM | 1004160 | 18.6 | 384.0 | 679.0 | 74 | 242 |
| 5 G 10 (AWG 8) | TC-ER / MTW / WTTC / AWM | 1004161 | 20.6 | 480.0 | 840.0 | 82 | 268 |
| Dimension n × mm² | Version | Reference item no. | Outer Ø mm | Cu index kg/km | Weight kg/km | Min. bend fixed 4 × d mm | Min. bend moved 13 × d mm |
|---|---|---|---|---|---|---|---|
| 3 G 16 (AWG 6) | TC-ER / MTW / WTTC / AWM | 1004169 | 20.7 | 460.8 | 833.0 | 83 | 269 |
| 4 G 16 (AWG 6) | TC-ER / MTW / WTTC / AWM | 1004162 | 23.8 | 614.4 | 1,109.0 | 95 | 309 |
| 5 G 16 (AWG 6) | TC-ER / MTW / WTTC / AWM | 1004163 | 26.3 | 768.0 | 1,362.0 | 105 | 342 |
| Dimension n × mm² | Version | Reference item no. | Outer Ø mm | Cu index kg/km | Weight kg/km | Min. bend fixed 4 × d mm | Min. bend moved 13 × d mm |
|---|---|---|---|---|---|---|---|
| 4 G 25 (AWG 4) | TC-ER / MTW / WTTC / AWM | 1004164 | 27.3 | 960.0 | 1,569.0 | 109 | 355 |
| Dimension n × mm² | Version | Reference item no. | Outer Ø mm | Cu index kg/km | Weight kg/km | Min. bend fixed 4 × d mm | Min. bend moved 13 × d mm |
|---|---|---|---|---|---|---|---|
| 4 G 35 (AWG 2) | TC-ER / MTW / WTTC / AWM | 1004165 | 30.2 | 1,344.0 | 2,041.0 | 121 | 393 |
| Dimension n × mm² | Version | Reference item no. | Outer Ø mm | Cu index kg/km | Weight kg/km | Min. bend fixed 4 × d mm | Min. bend moved 13 × d mm |
|---|---|---|---|---|---|---|---|
| 4 G 50 (AWG 1) | TC-ER / MTW / WTTC / AWM | 1004166 | 36.7 | 1,920.0 | 2,967.0 | 147 | 477 |
| Dimension n × mm² | Version | Reference item no. | Outer Ø mm | Cu index kg/km | Weight kg/km | Min. bend fixed 4 × d mm | Min. bend moved 13 × d mm |
|---|---|---|---|---|---|---|---|
| 4 G 70 (AWG 2/0) | TC-ER / MTW / WTTC / AWM | 1005166 | 41.7 | 2,688.0 | 3,971.0 | 167 | 542 |
| Dimension n × mm² | Version | Reference item no. | Outer Ø mm | Cu index kg/km | Weight kg/km | Min. bend fixed 4 × d mm | Min. bend moved 13 × d mm |
|---|---|---|---|---|---|---|---|
| 4 G 95 (AWG 3/0) | TC-ER / MTW / WTTC / AWM | 1005427 | 46.7 | 3,648.0 | 5,198.0 | 187 | 607 |
| Dimension n × mm² | Version | Reference item no. | Outer Ø mm | Cu index kg/km | Weight kg/km | Min. bend fixed 4 × d mm | Min. bend moved 13 × d mm |
|---|---|---|---|---|---|---|---|
| 4 G 120 (AWG 4/0) | TC-ER / MTW / WTTC / AWM | 1005858 | 49.3 | 4,608.0 | 6,169.0 | 197 | 641 |
6. Application envelope
Oil-resistant power and control cable for cable trays and cable channels, for machines and equipment destined for the North American market. For medium mechanical stress, for fixed and flexible applications with free movement without tensile stress and without forced guidance. Suitable for dry, damp and wet interiors including water-oil mixtures. TC-ER approval for open wiring between cable tray and industrial machine per NEC 336.10(7).
7. Comparison
| Type | Approvals | Voltage | Fire | NEC field-wiring scope |
|---|---|---|---|---|
| MULTINORM H05VV5-F | HAR + UL + CSA (AWM) | 300/500 V · 600 V | IEC 60332-1, VW-1, FT1 | AWM only (equipment internal) |
| 2-NORM 1 000 V UL/CSA | cURus + VDE-Reg. | 300/500 V · 1 000 V | IEC 60332-3-24 Cat. C, VW-1, FT1 | AWM / equipment wiring |
| 2-NORM TRAY TC-ER MTW | UL listed (1277/1063) + UL/CSA recognised | 600 V · 1 000 V · IEC 0.6/1 kV | IEC 60332-3A, FT4/IEEE | Field wiring: trays, exposed runs, Class 1 Div. 2 |
| UL TC-ER (generic) | UL listed | 600 V | FT4 | NEC field wiring |
8. Design calculations
9. Certification and traceability
This cable is UL listed to UL 1277 and UL 1063, UL/CSA recognised to UL 10012 and 2587, and listed for NEC 336.10(7) Class 1 Div. 2 per NEC Articles 336, 392 and 501. It is RoHS-conform, CE-conform to the 2014/35/EU Low Voltage Directive and conforms to NFPA 79 2007 wiring norms. FeiChun Cable holds a complete export certification portfolio — including CE, UKCA, VDE, EAC, ATEX and IECEx — and every certificate supplied is checked against the exact type, voltage, factory and standard of the order.
Routine tests
Conductor resistance, 6 kV voltage test, dimensions, UL surface marking.
Type tests
FT4/IEEE vertical-tray flame, IEC 60332-3A bunched, UL OIL RES I oil immersion, UL wet 75 °C.
Delivery documents
Approved datasheet, test report per drum, UL listing marks (TC-ER, MTW, WTTC), batch number and length marking.
10. FAQ
What does TC-ER mean?
Tray Cable – Exposed Run. Under NEC 336.10(7) it may be run exposed (without conduit) between the cable tray and the industrial machine or equipment it serves. This eliminates the conduit or armour otherwise required for the exposed section.
TC-ER versus AWM — what is the difference?
AWM (Appliance Wiring Material) is for wiring inside equipment only. TC-ER is a listed cable type for field wiring in cable trays and the exposed run to the machine. If the NEC or the local authority requires a listed tray cable, AWM is not sufficient.
What is WTTC?
Wind Turbine Tray Cable — a 1 000 V tray-cable rating for wiring inside wind-turbine towers and nacelles. The cable also carries the standard 600 V TC rating.
What is MTW?
Machine Tool Wire, listed to UL 1063. It confirms the cable is suitable for wiring inside machine tools per NFPA 79 (Electrical Standard for Industrial Machinery).
Can it be used in Class 1 Division 2?
Yes. It is listed for NEC 336.10(7) Class 1 Div. 2 per NEC Articles 336, 392 and 501 — hazardous locations where ignitable concentrations of flammable gases or vapours exist only under abnormal conditions.
Is it oil-resistant?
Yes: UL OIL RES I per UL 1277 and UL 1063, and water-resistant with UL wet approval at 75 °C. The sheath is also largely resistant to acids and bases.
Does it need a screen?
This cable is unscreened. For EMC-critical circuits, combine with a screened type or add external screening at the installation.
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