What Does XHHW-2 Wire Mean in Electrical Wiring Systems

XHHW-2 is a standard UL-listed single-conductor building wire widely used across North American commercial, industrial and utility power distribution projects. Many electrical contractors and project owners not only need to decode its letter marking, but also seek formal XHHW/XHHW-2 Copper Wire quote, download complete XHHW/XHHW-2 Copper Wire datasheet, and select heavy-gauge options including 500 kcmil XHHW-2 Copper Wire and 750 kcmil Copper XHHW/XHHW-2 Wire for large main feeder circuits. This article combines definition explanation, size selection and purchasing guide to solve core inquiries for electrical engineering buyers.

1. Letter-by-Letter Definition of XHHW-2

Each marking on XHHW/XHHW-2 Copper Wire corresponds to fixed UL44 performance standards:

X: Cross-linked Polyethylene (XLPE) thermoset insulation, anti-oil, anti-UV and high-temperature resistant

First H: 90°C maximum continuous temperature under dry working conditions

Second H: Maintains full 90°C ampacity in wet locations

W: Certified for permanent wet-location installation (buried conduit, damp basements, outdoor trays)

Suffix 2: Enhanced gasoline and hydraulic oil resistance, mandatory for factory and mechanical workshop wiring

Core summary: XHHW-2 = XLPE insulated copper wire rated 90°C wet & dry with upgraded oil resistance, 600V voltage rating.

2. Large-Gauge XHHW/XHHW-2 Copper Wire: 500 kcmil & 750 kcmil Models

For heavy-load main feeders, substation power transmission and large industrial plant power distribution, two mainstream oversized specifications dominate project tender lists:

2.1 500 kcmil XHHW-2 Copper Wire

500 kcmil XHHW-2 Copper Wire adopts compressed bare stranded copper conductor wrapped with standard XLPE insulation.

Ampacity advantage: Carries stable high continuous current for medium-scale factory main feeders, high-rise building basement power panels and distributed solar farm combiner box trunk lines

Installation scenarios: Underground direct burial, open cable tray exposed runs, large commercial complex service entrance circuits

Matching demand: Medium-size industrial parks, shopping mall main power loops, medium-capacity energy storage system internal wiring

2.2 750 kcmil Copper XHHW/XHHW-2 Wire

750 kcmil Copper XHHW/XHHW-2 Wire is the maximum common heavy gauge for low-voltage industrial power distribution, with larger cross-sectional copper area and ultra-low voltage drop.

Ampacity advantage: Supports ultra-high current transmission for heavy manufacturing plants, airport main distribution rooms, municipal water treatment station main feeders and large ground-mount solar power stations

Installation scenarios: Substation outgoing lines, multi-building campus trunk power circuits, mine central power distribution systems

Key merit: Less parallel wiring required compared with smaller gauges, reducing construction complexity and terminal connection failure risks

Both 500 kcmil and 750 kcmil sizes comply with unified XHHW-2 performance standards: 90°C wet/dry rating, oil resistance and UV stability, and can be fully referenced in the official XHHW/XHHW-2 Copper Wire datasheet.

3. How to Get Official XHHW/XHHW-2 Copper Wire Datasheet & Accurate Quote

3.1 Request XHHW/XHHW-2 Copper Wire datasheet for project design

The official datasheet contains complete technical parameters critical for electrical drawing design and inspection submission:

Conductor strand count, outer diameter, insulation thickness of each gauge (from small AWG to 500 kcmil /750 kcmil)

Rated ampacity tables for dry, wet and tray installation environments

UL44 test reports, temperature derating rules, chemical resistance data

Color options, standard spool packaging length and CT exposed run certification marks

Engineers can send project voltage, load current, installation environment and required gauge sizes to the manufacturer to obtain the full printable XHHW/XHHW-2 Copper Wire datasheet with official factory stamps for bidding documents.

3.2 Apply for customized XHHW/XHHW-2 Copper Wire quote

To get an accurate bulk price quotation, buyers need to provide complete information for the supplier:

Required wire gauge: Specify small AWG, 500 kcmil XHHW-2 Copper Wire, or 750 kcmil Copper XHHW/XHHW-2 Wire

Total order quantity, single spool length and color requirements

Destination market (US/Canada) to confirm UL certification matching local NEC codes

Special demands: CT tray marking, sunlight-resistant insulation, customized wooden reel packaging, door-to-door shipping service

Project schedule and payment terms for factory bulk pricing discount

A formal XHHW/XHHW-2 Copper Wire quote will list unit meter price, total order cost, production lead time, certification copy attachment and after-sales technical support policy.

4. Key Application Differences Between Standard & Large Kcmil XHHW-2 Wire

All sizes share identical XLPE insulation performance, and full parameter comparison can be viewed in one unified XHHW/XHHW-2 Copper Wire datasheet.

Frequently Asked Questions

Q1: What project conditions require 750 kcmil Copper XHHW/XHHW-2 Wire instead of 500 kcmil XHHW-2 Copper Wire?

Select 750 kcmil Copper XHHW/XHHW-2 Wire if the circuit needs ultra-high ampacity over long transmission distance, such as factory main feeders over 200 meters, airport central power rooms and large-scale ground solar farms. 500 kcmil XHHW-2 Copper Wire fits medium load circuits with shorter transmission distance to balance cost and current capacity.

Q2: What documents are included in the official XHHW/XHHW-2 Copper Wire datasheet?

The standard datasheet covers dimension tables, ampacity charts, UL certification information, temperature resistance data, chemical oil resistance test results, packaging specifications and installation compliance notes for all gauges including 500 kcmil and 750 kcmil. It can be used directly for project bidding and electrical inspection submission.

Q3: What information do I need to provide to receive a precise XHHW/XHHW-2 Copper Wire quote?

You must confirm wire gauge (clear if you need 500 kcmil XHHW-2 Copper Wire or 750 kcmil Copper XHHW/XHHW-2 Wire), total order meters, color, reel length, target market certification requirements and delivery terms to get an accurate factory quotation without price adjustment after order confirmation.

Q4: Can both 500 kcmil and 750 kcmil XHHW-2 wire be installed exposed on cable trays?

Yes. All UL-listed XHHW/XHHW-2 Copper Wire including large kcmil sizes are CT-rated for open tray runs, fully compliant with NEC Article 310, which is clearly recorded in the official XHHW/XHHW-2 Copper Wire datasheet.

Conclusion

XHHW-2 wire’s letter marking system defines its all-weather, oil-resistant XLPE insulated performance, covering wiring demands from small indoor branch circuits to heavy industrial main feeders. For large power distribution projects, 500 kcmil XHHW-2 Copper Wire and 750 kcmil Copper XHHW/XHHW-2 Wire solve high-current long-distance transmission pain points. Buyers can request complete technical parameters via the official XHHW/XHHW-2 Copper Wire datasheet and submit detailed project parameters to obtain a transparent, customized XHHW/XHHW-2 Copper Wire quote from qualified manufacturers.

Marketing Closing & Company Contact

Dongguan GERITEL Electrical Co., Ltd. supplies full-size UL-certified XHHW/XHHW-2 Copper Wire, including standard AWG, 500 kcmil XHHW-2 Copper Wire and heavy-duty 750 kcmil Copper XHHW/XHHW-2 Wire. We provide free official stamped XHHW/XHHW-2 Copper Wire datasheet for engineering design and tender use, and offer competitive customized bulk XHHW/XHHW-2 Copper Wire quote for global North American construction, industrial and solar projects. All products pass strict UL44 testing and fully comply with NEC electrical codes.

Dongguan GERITEL Electrical Co., Ltd.

Tel/WhatsApp/Wechat: +86 136 6257 9592

Tel/WhatsApp/Wechat: +86 135 1078 4550

Email: manager01@greaterwire.com

Website: www.geritelgroup.com