CU THHN

600V Copper Thermoplastic High Heat-Resistant Nylon-Coated Building Wire

PRODUCT DESCRIPTION

CU THHN is a 600V copper building wire designed for general-purpose electrical wiring, power distribution, lighting, control circuits, and equipment wiring.

The cable features annealed copper conductors, heat-resistant thermoplastic insulation, and a durable nylon outer coating. The THHN construction provides excellent electrical conductivity, good mechanical protection, and resistance to common oils and chemicals encountered in electrical installations.

CU THHN is suitable for installation in conduit, raceways, cable trays, and other recognized wiring systems where permitted by applicable electrical codes.

The cable may also be manufactured with dual THHN/THWN-2 markings when the construction meets the corresponding requirements, providing additional suitability for wet-location applications.

APPLICATIONS

• Building electrical wiring

• Commercial electrical installations

• Industrial power distribution

• Residential branch circuits

• Lighting circuits

• Control circuits

• Equipment wiring

• Panelboards

• Switchboards

• Motor control systems

• Conduit and raceway systems

• Cable tray installations where permitted

• Machine and equipment wiring

• Dry and wet locations when appropriately marked

STANDARDS & COMPLIANCE

Typical reference standards may include:

• UL 83 — Thermoplastic-Insulated Wires and Cables

• ASTM B3 — Soft or Annealed Copper Wire

• ASTM B8 — Concentric-Lay-Stranded Copper Conductors

• NFPA 70 / NEC where applicable

• Applicable electrical installation and project requirements

Final certification and marking shall depend on the actual conductor construction, insulation system, production requirements, and applicable market regulations.

CONSTRUCTION

1. Conductor

• Material: Soft or annealed copper

• Construction: Solid or stranded, depending on conductor size

• High electrical conductivity

• Low electrical resistance

• Good flexibility for installation

• Suitable for general-purpose building wiring

2. Primary Insulation

• Material: Thermoplastic insulation

• Temperature rating: 90°C dry

• Voltage rating: 600V

• Flame-retardant properties according to applicable requirements

• Good electrical insulation performance

• Good resistance to heat and moisture

3. Nylon Jacket

A thin, durable nylon coating is applied over the thermoplastic insulation.

The nylon jacket provides additional protection against:

• Abrasion

• Oils

• Gasoline and common hydrocarbons

• Chemicals

• Mechanical damage

• Installation stress

The nylon layer also provides a smooth cable surface that facilitates pulling through conduit and raceway systems.

TYPICAL AVAILABLE CONDUCTOR SIZES

Custom conductor sizes and constructions can be supplied according to project requirements.

ELECTRICAL CHARACTERISTICS

Ampacity shall be determined according to conductor size, installation method, ambient temperature, number of current-carrying conductors, and applicable electrical code.

THERMAL PERFORMANCE

CU THHN is typically rated:

90°C Dry

The allowable ampacity in a specific installation shall be determined according to the applicable electrical code and installation conditions.

Where a cable is dual marked THHN/THWN-2, the THWN-2 marking provides a 90°C wet-location rating subject to the applicable certification and construction.

MECHANICAL PERFORMANCE

The combination of thermoplastic insulation and nylon coating provides:

• Good abrasion resistance

• Good surface durability

• Easy conduit installation

• Improved pulling performance

• Resistance to common installation stresses

• Protection against minor mechanical damage

The actual allowable pulling tension and minimum bending radius depend on conductor size and installation conditions.

ENVIRONMENTAL PERFORMANCE

CU THHN is designed primarily for electrical wiring applications where the applicable THHN construction is permitted.

The nylon-coated construction provides resistance to:

• Moisture

• Oil

• Gasoline

• Common chemicals

• Abrasion

• Heat

For wet-location applications, the product should carry the appropriate wet-location marking, such as THWN-2, when the construction is certified accordingly.

INSTALLATION

CU THHN should be installed by qualified electrical personnel in accordance with applicable electrical codes and project specifications.

Typical installation methods include:

• Conduit

• Raceway

• Electrical boxes

• Panelboards

• Switchboards

• Equipment wiring

• Cable trays where permitted

• Other recognized wiring methods

Installation considerations include:

• Use appropriate pulling equipment.

• Avoid excessive pulling tension.

• Maintain the recommended bending radius.

• Prevent damage to the nylon coating.

• Use compatible copper-rated terminals and connectors.

• Follow specified connector torque requirements.

• Maintain proper conductor identification.

• Observe applicable ampacity and derating requirements.

KEY FEATURES

• 600V rated building wire

• Annealed copper conductor

• Solid or stranded construction

• Thermoplastic insulation

• Durable nylon coating

• 90°C dry-location rating

• Excellent electrical conductivity

• Good abrasion resistance

• Oil and gasoline resistance

• Smooth pulling surface

• Suitable for conduit and raceway systems

• Available in a wide range of AWG and kcmil sizes

PRODUCT ADVANTAGES

High Electrical Conductivity

Annealed copper provides excellent electrical conductivity and low electrical resistance, supporting efficient power transmission.

Heat-Resistant Construction

The thermoplastic insulation system provides a typical 90°C dry-location operating temperature rating.

Durable Nylon Coating

The nylon outer coating provides additional protection against abrasion, oils, gasoline, and common chemicals.

Easy Installation

The smooth nylon surface facilitates pulling through conduit and raceway systems while helping reduce installation friction.

Wide Application Range

CU THHN is suitable for residential, commercial, industrial, control, lighting, and equipment wiring applications where the applicable wiring method permits its use.

QUALITY CONTROL

Typical quality-control procedures may include:

• Conductor resistance testing

• Conductor diameter inspection

• Conductor construction inspection

• Insulation thickness inspection

• Nylon coating thickness inspection

• Spark testing

• High-voltage testing

• Tensile and elongation testing

• Flame testing where applicable

• Finished wire dimensional inspection

• Visual inspection

• Electrical performance testing

Routine testing shall be performed according to applicable product standards and customer specifications.

PACKAGING

CU THHN may be supplied in:

• Coils

• Cartons

• Plastic reels

• Wooden reels

• Wooden drums

• Custom export packaging

Packaging and length can be customized according to conductor size, order quantity, transportation method, and project requirements.

CUSTOMIZATION

Available customization options may include:

• Conductor size

• Solid or stranded conductor

• Insulation color

• Nylon coating color

• Conductor construction

• Packaging method

• Coil length

• Reel length

• Drum length

• Sequential marking

• Custom printing

• Project-specific labeling

TECHNICAL SUPPORT

Technical documentation can be provided upon request, including:

• Conductor resistance

• Cable weight

• Overall diameter

• Insulation thickness

• Nylon coating thickness

• Ampacity reference data

• Packing information

• Product drawings

• Test reports

• Certificate documentation

• Project-specific technical datasheets

FAQ

What is CU THHN?

CU THHN is a 600V copper building wire with thermoplastic insulation and a nylon outer coating, commonly used for electrical wiring, power distribution, lighting, control circuits, and equipment wiring.

What does THHN mean?

THHN identifies a thermoplastic-insulated wire with a nylon coating and a typical 90°C dry-location temperature rating under the applicable product standard.

What is the voltage rating?

The typical voltage rating is 600V.

What is the temperature rating?

THHN is typically rated 90°C in dry locations.

Can CU THHN be used in wet locations?

THHN alone is not generally the appropriate wet-location marking. If the product is certified and marked THWN-2, it can provide a 90°C wet-location rating subject to the applicable construction and certification.

Is the conductor copper?

Yes. CU THHN uses annealed copper conductors.

Is CU THHN available in stranded construction?

Yes. Stranded construction is commonly used for larger conductor sizes and applications requiring improved installation flexibility.

What is the advantage of the nylon coating?

The nylon coating provides additional resistance to abrasion, oils, gasoline, and common chemicals while providing a smooth surface for conduit installation.

Can CU THHN be used for industrial applications?

Yes. It is widely used for industrial control, equipment wiring, power distribution, motor circuits, panelboards, and other applications where the applicable wiring method permits THHN.

What is the difference between THHN and THWN-2?

THHN is typically rated 90°C dry, while THWN-2 is rated 90°C in both wet and dry locations when properly certified and marked.

Can the wire be customized?

Yes. Conductor size, construction, color, marking, packaging, and other production parameters can be customized according to project requirements.

SEO INFORMATION

SEO Product Title:
CU THHN 600V Copper Building Wire | 90°C Nylon-Coated Wire

Short Description:
CU THHN is a 600V copper building wire with thermoplastic insulation and a durable nylon coating, designed for electrical wiring, power distribution, lighting, control circuits, and equipment applications.

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CU THHN 600V copper building wire with 90°C dry rating, thermoplastic insulation, and nylon coating for residential, commercial, industrial, and electrical distribution applications.

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CU THHN 600V Copper Building Wire

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CU THHN 600V copper building wire with thermoplastic insulation and nylon coating