UL 1277 CU THHN Type TC Control Cable 600V
UL 1277 CU THHN Control Cable is a 600V unshielded multicore Type TC substation/control cable with annealed Class B compressed stranded copper conductors, heat- and moisture-resistant PVC insulation, a clear nylon conductor jacket and a black PVC overall jacket. It is designed for tray, conduit, underground duct and direct-burial installations in wet or dry locations.
PRODUCT OVERVIEW
Predominantly used in utility substations, this cable may be installed indoors or outdoors in cable trays, conduit and underground ducts, or directly buried. The brochure specifies conductor operating temperatures up to 75°C in wet locations and 90°C in dry locations.
The finished cable is unshielded. Insulated and nylon-jacketed conductors are cabled with non-hygroscopic polyethylene fillers where needed to maintain a circular cross-section, wrapped with a Mylar binder and protected by a heat-, moisture- and sunlight-resistant black PVC jacket.
KEY FEATURES
- UL 1277 Type TC finished cable construction, rated 600V.
- Operating temperature: 75°C wet and 90°C dry.
- 16–10 AWG annealed Class B copper, unilay compressed stranded.
- Heat- and moisture-resistant PVC insulation with a clear nylon (polyamide) conductor jacket.
- Unshielded construction: no overall metallic shield and no drain wire.
- Heat-, moisture- and sunlight-resistant black PVC overall jacket.
- Color coding per ICEA S-73-532, Method 1, Table E-2.
- 16 AWG uses 26 strands; 14, 12 and 10 AWG use 7 strands.
- 2 to 12 conductors across the listed product schedule.
- Brochure references ASTM, ANSI/ICEA S-73-532, UL 83, UL 66, UL 1277, UL 1581, UL 1685 and RoHS.
STANDARD REFERENCE & COMPLIANCE
Item | Details |
Principal Finished-Cable Standard | UL 1277 |
Cable Type | Type TC Substation / Control Cable |
Rated Voltage | 600V |
Additional References in Brochure | ANSI/ICEA S-73-532; UL 83 Type THHN; UL 66 Type TFFN; UL 1581; UL 1685; applicable ASTM; RoHS |
Product Position | Unshielded copper THHN control cable with black PVC overall jacket |
Compliance Note | Confirm exact UL listing, cable marking, direct-burial, wet-location, sunlight-resistance and flame-test approvals on the offered product documents. |
UL 1277 is the principal finished-cable standard for this Type TC product. UL 83 Type THHN and UL 66 Type TFFN are conductor/component references listed by the brochure; they do not replace UL 1277 as the governing standard for the completed multicore tray/control cable.
UL 1277 PRODUCT & INSTALLATION FOCUS
Focus | How It Relates to This Product |
Complete Cable Assembly | UL 1277 Type TC multicore copper control cable under an overall PVC jacket |
Tray / Raceway Use | Brochure lists cable trays, conduit and underground duct |
Indoor / Outdoor Use | Both are stated in the supplied applications |
Wet / Dry Locations | 75°C wet and 90°C dry conductor operating limits |
Direct Burial | Stated in the brochure; confirm product marking and approval documentation |
Shielding | Unshielded; no metallic shield or drain wire |
STANDARD ROLE: FINISHED CABLE VS COMPONENT REFERENCES
Reference | Primary Role | Relevance to This Product |
UL 1277 | Finished Type TC cable | Principal product standard for the complete 600V cable |
UL 83 Type THHN | Thermoplastic-insulated conductor | PVC insulation plus clear nylon conductor jacket |
UL 66 Type TFFN | Flexible-fixture wire reference | Additional conductor reference listed by the brochure |
ANSI/ICEA S-73-532 | Control-cable construction / identification | Method 1, Table E-2 core color coding |
UL 1581 / UL 1685 | Cable tests / flame exposure | Test references listed by the brochure |
ASTM / RoHS | Materials and substance compliance | Applicable ASTM standards and RoHS are stated in the brochure |
The standards listed by the brochure play different roles. UL 1277 addresses the completed Type TC cable, while UL 83, UL 66, UL 1581, UL 1685 and ICEA/ASTM references support conductor construction, identification and test requirements. Final markings and approvals should be confirmed on the offered cable documentation.
CABLE CONSTRUCTION
Conductor | Annealed Class B copper, unilay compressed stranded |
Conductor Range | 16–10 AWG; 26 strands at 16 AWG, 7 strands at 14/12/10 AWG |
Insulation | Tough, heat- and moisture-resistant PVC |
Conductor Jacket | Clear nylon (polyamide) |
Assembly | Non-hygroscopic polyethylene fillers as needed; Mylar binder |
Metallic Shield / Drain Wire | None / None |
Overall Jacket | Heat-, moisture- and sunlight-resistant black PVC |
Core Identification | ICEA S-73-532, Method 1, Table E-2 |
WHY 16 AWG USES 26 STRANDS
The brochure lists 16 AWG conductors as 26-strand Class B compressed copper, while 14, 12 and 10 AWG conductors use 7 strands. This strand-count distinction is part of the supplied construction schedule and should be retained when preparing manufacturing data or approval documents.
PRODUCT APPLICATIONS
- Utility-substation control circuits.
- Indoor or outdoor cable-tray installations.
- Conduit and underground-duct installations.
- Direct-burial installations as stated in the brochure.
- Wet locations up to 75°C conductor operating temperature.
- Dry locations up to 90°C conductor operating temperature.
- Locations requiring a heat-, moisture- and sunlight-resistant black PVC overall jacket.
TECHNICAL SPECIFICATIONS
The following values are reproduced from the supplied UL1277 CU THHN CONTROL CABLE brochure. Units are retained in both imperial and metric form as provided in the source.
| Conductors | AWG | Jacket in | OD in | OD mm | Weight lb/1000 ft | Weight kg/km |
|---|---|---|---|---|---|---|
| 2 | 16 | 0.045 | 0.288 | 7.3 | 43 | 64 |
| 3 | 16 | 0.045 | 0.303 | 7.7 | 53 | 79 |
| 4 | 16 | 0.045 | 0.329 | 8.4 | 66 | 98 |
| 5 | 16 | 0.045 | 0.357 | 9.1 | 81 | 120 |
| 7 | 16 | 0.045 | 0.386 | 9.8 | 103 | 153 |
| 9 | 16 | 0.045 | 0.447 | 11.4 | 134 | 199 |
| 12 | 16 | 0.045 | 0.501 | 12.7 | 165 | 245 |
| 2 | 14 | 0.045 | 0.305 | 7.8 | 56 | 83 |
| 3 | 14 | 0.045 | 0.322 | 8.2 | 74 | 110 |
| 4 | 14 | 0.045 | 0.350 | 8.9 | 93 | 139 |
| 5 | 14 | 0.045 | 0.381 | 9.7 | 109 | 162 |
| 6 | 14 | 0.045 | 0.413 | 10.5 | 129 | 192 |
| 7 | 14 | 0.045 | 0.413 | 10.5 | 145 | 215 |
| 8 | 14 | 0.045 | 0.446 | 11.3 | 164 | 243 |
| 9 | 14 | 0.045 | 0.478 | 12.2 | 182 | 271 |
| 10 | 14 | 0.060 | 0.550 | 14.0 | 217 | 322 |
| 12 | 14 | 0.060 | 0.568 | 14.4 | 251 | 373 |
| 2 | 12 | 0.045 | 0.340 | 8.6 | 75 | 112 |
| 3 | 12 | 0.045 | 0.360 | 9.2 | 105 | 156 |
| 4 | 12 | 0.045 | 0.392 | 10.1 | 128 | 190 |
| 5 | 12 | 0.045 | 0.428 | 10.9 | 154 | 229 |
| 6 | 12 | 0.045 | 0.466 | 11.8 | 183 | 272 |
| 7 | 12 | 0.045 | 0.466 | 11.8 | 207 | 308 |
| 8 | 12 | 0.045 | 0.504 | 12.8 | 234 | 349 |
| 9 | 12 | 0.060 | 0.572 | 14.5 | 277 | 412 |
| 10 | 12 | 0.060 | 0.621 | 15.8 | 307 | 457 |
| 12 | 12 | 0.060 | 0.641 | 16.3 | 358 | 532 |
| 2 | 10 | 0.045 | 0.407 | 10.3 | 111 | 166 |
| 3 | 10 | 0.045 | 0.433 | 11.0 | 155 | 230 |
| 4 | 10 | 0.045 | 0.473 | 12.0 | 198 | 294 |
| 5 | 10 | 0.060 | 0.549 | 13.9 | 250 | 371 |
| 6 | 10 | 0.060 | 0.596 | 15.1 | 294 | 437 |
| 7 | 10 | 0.060 | 0.596 | 15.1 | 333 | 495 |
| 8 | 10 | 0.060 | 0.645 | 16.4 | 377 | 561 |
| 9 | 10 | 0.060 | 0.693 | 17.6 | 421 | 626 |
| 10 | 10 | 0.060 | 0.755 | 19.2 | 467 | 694 |
| 12 | 10 | 0.060 | 0.780 | 19.8 | 547 | 814 |
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From Production to Delivery
From raw material preparation to final shipmen, every stage is caretuly controled to ensure consistent conductor quality, reliable pertormance,and sae delivery. Our roduction,
inspection, packaging, and logistics processes are managed in accordance with applicable standards and project requirements.
Production
Annealed Class B copper conductors are PVC-insulated, covered with clear nylon, color identified, cabled with polyethylene fillers where needed, wrapped with a Mylar binder and finished with a black PVC overall jacket.
Inspection
Inspection should verify conductor strand count and size, insulation and nylon layers, core identification, assembly, jacket integrity, finished diameter, cable weight and the electrical and flame-test requirements applicable to the approved construction.
Packaging
Finished cable is wound on suitable reels or drums according to cable size, weight and ordered length. Product identification may include UL 1277 / Type TC designation, conductor size and count, voltage, length and project reference, subject to the approved marking.
Shipping
Before shipment, cable identification, packing and requested technical documents are checked against the order. Certification, test reports and project-specific approval records should be agreed before production.
Frequently Asked Questions
What is the principal product standard for this cable?
UL 1277 is the principal standard for the completed 600V Type TC cable. UL 83 Type THHN and UL 66 Type TFFN are additional conductor/component references listed in the brochure.
Can this cable be installed in tray, conduit or underground duct?
Yes. The brochure states indoor and outdoor installation in cable trays, conduit and underground duct. Installation details such as fill, support, pulling tension and termination space still need project verification.
Can it be directly buried or used in wet locations?
The brochure states direct-burial and wet-location use, with conductor operation not exceeding 75°C when wet. Confirm the exact cable marking and approval documentation for the offered construction before procurement.
What temperature rating applies?
The supplied product data states a maximum conductor operating temperature of 75°C in wet locations and 90°C in dry locations.
Is this product shielded?
No. Every schedule group is identified as unshielded, and the detailed construction does not include a metallic shield or drain wire. If circuit interference control requires shielding, a separate shielded construction should be selected.
What products do you supply for the power cable industry?
We provide a wide range of cable materials and electrical products, including aluminum conductors, aluminum rods, aluminum wires, overhead conductors, medium and low voltage power cables, cable insulation materials, filling materials, shielding materials, and cable manufacturing consumables.We provide customized solutions according to different cable manufacturing requirements.
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