Transmission and distribution infrastructure spending is accelerating across North America and global energy markets. Utilities are expanding grid capacity, replacing ageing infrastructure, connecting renewable energy projects, and preparing for rising electrical demand driven by industrial electrification and AI-focused data center growth.

Utility-scale cable procurement has gotten more complex in step with this growth. Large projects now require long-term material planning, specification-driven sourcing, logistics coordination, and access to both standard and hard-to-source medium- and high-voltage cable.

This list highlights 10 companies supporting utility-scale transmission and distribution projects in 2026, including global cable manufacturers and large-scale suppliers serving utilities, EPC contractors, renewable energy projects, and major infrastructure developments.

Utility Transmission & Distribution Market At A Glance

The global power cables market was valued at $195.8 billion in 2025 and is projected to reach $296.7 billion by 2034, growing at a 4.73% CAGR, according to IMARC Group. Utility transmission and distribution accounts for 28.2% of total application share — the largest single segment — spanning voltage ranges from 69kV transmission lines down to 240V residential service connections (Persistence Market Research).

In the United States, the investment cycle is historically large. Morningstar DBRS, via Utility Dive, projects that U.S. utility capital expenditures will total $1.4 trillion from 2025 to 2030, double the amount invested in the prior decade. Of the U.S. portion, grid investment is roughly split between transmission (37%) and distribution infrastructure (63%), according to a JPMorgan report citing BNEF data.

A significant driver of that acceleration is data center load growth. S&P Global Market Intelligence / 451 Research projected U.S. data center power demand reached 61.8 GW in 2025 and will rise to 75.8 GW in 2026, expanding to 134.4 GW by 2030. That demand is pushing utilities to expand and upgrade transmission and distribution networks — including new high-voltage lines and substation infrastructure — ahead of schedules that were set before AI infrastructure spending accelerated.

Globally, cumulative grid investment between 2026 and 2035 is forecast at $5.8 trillion, with China, the EU, and the U.S. accounting for roughly two-thirds of that spending (JPMorgan). The scale of planned investment is translating directly into sustained demand for utility-grade cables.

What Utility Projects Actually Require From Cable Suppliers

Utility-scale T&D projects operate differently from standard commercial electrical projects. Procurement teams are often sourcing cable for large-scale grid infrastructure projects that require long lead times, strict specifications, and coordinated delivery schedules. Material decisions made early in planning have direct consequences for construction schedules months later.

In these environments, price per foot is rarely the primary evaluation criterion. Utilities, EPC firms, cooperatives, and infrastructure developers assess suppliers on specification compliance, manufacturing lead times, logistics coordination, and the ability to deliver consistent material across phased construction schedules. Documentation requirements, such as utility-grade certifications and traceability records, add another layer that not every supplier can support.

New pressures compound this. Grid modernisation is accelerating across North America, and AI-driven data centre buildout is driving transmission and distribution load in regions that weren't planning for it. Both of these factors are extending lead times for medium- and high-voltage cable, which is an extra pressure on procurement.

This is why utility buyers now consider both global manufacturers and procurement-focused distributors. Manufacturers dominate production capacity and high-voltage engineering. Distributors like NNC fill the gap on sourcing flexibility and hard-to-find inventory, particularly when schedule risk is the bigger concern.

Here are 10 suppliers that represent the range of options available for utility-scale T&D procurement in 2026, from global manufacturers to procurement-focused distributors:

1. Nassau National Cable

Best Fit For: EPCs, utilities, and infrastructure projects requiring sourcing flexibility

Nassau National Cable is a wire and cable distributor headquartered in Great Neck, New York, incorporated in 2013. It operates as a procurement-focused supplier supporting utility, renewable energy, industrial, and infrastructure projects across the United States. The company specialises in sourcing medium-voltage, utility distribution, and speciality power cable for large-scale projects where standard supply chains fall short.

Where manufacturers focus on production capacity, Nassau National Cable competes on procurement agility and nationwide fulfilment, which matter most for hard-to-source and time-sensitive projects.

The company supports projects involving underground distribution, substations, renewable interconnections, utility infrastructure upgrades, and large-scale electrical construction. In one documented case, Nassau National Cable sourced more than 218,000 feet of 35kV URD cable for a utility-scale solar project within a compressed delivery timeline.

Its combination of sourcing flexibility, access to standard and hard-to-source inventory, and experience with infrastructure procurement positions it as a practical option alongside manufacturers for utility-scale T&D work.

Nassau National Cable can serve as a primary supplier or a pre-approved secondary source. The company supports phased and staged delivery, sources across multiple manufacturers to avoid single-supplier dependency, and provides full documentation and traceability on all orders. Typical order volumes run 10,000–300,000 feet, scalable on request.

2. Prysmian Group

Best Fit For: Large transmission and interconnection projects around the world

Prysmian Group is one of the largest global manufacturers of transmission and distribution cable systems. The company is active across HVDC interconnections, underground transmission infrastructure, submarine cable projects, and utility modernization programs worldwide.

Its portfolio spans medium-voltage, high-voltage, and extra-high-voltage systems used in utility-scale power transmission, renewable interconnections, and grid expansion. Prysmian's scale and engineering depth make it a standard consideration on large-budget, long-timeline transmission projects.

Prysmian reported €17.1 billion in revenue for FY2024, with organic growth in the transmission segment at 39% through Q3 2025 — driven largely by HVDC demand and major grid projects in Europe and North America. Its 2024 acquisition of Encore Wire added a large-scale North American manufacturing base in Texas, strengthening its position in domestic utility and infrastructure markets. Prysmian has committed $2 billion toward capacity expansion through 2027, including doubling production of 525 kV submarine cables.

3. Nexans

Best Fit For: Grid modernization and utility infrastructure upgrades

Nexans reported €7.8 billion in revenue for FY2025, with a €7.9 billion transmission backlog providing visibility through 2028. The company has positioned itself in grid modernisation and electrification. It supplies MV and HV cable systems for transmission, distribution, renewable interconnections, and utility infrastructure upgrades.

Where Prysmian leads on HVDC and submarine megaprojects, Nexans is more broadly oriented toward grid rehabilitation, capacity expansion, and smart grid buildout, with long-standing relationships with transmission system operators and utilities across Europe. Its pending acquisition of Republic Wire, alongside earlier purchases of Cables RCT and Electro Cables, reflects a deliberate expansion into North American distribution infrastructure. The company also operates its own cable-laying fleet, giving it end-to-end delivery capability on subsea and offshore transmission projects that most manufacturers can't match.

4. Southwire

Best Fit For: Domestic utility and infrastructure projects in the USA

Southwire is a privately held manufacturer headquartered in Carrollton, Georgia, with approximately $8.4 billion in revenue and production spread across 30+ North American plants. Its utility portfolio covers overhead and underground conductors, medium-voltage cable, and substation wire, and its scale makes it a standard specification for U.S. utility distribution systems and infrastructure contractors. For projects with Buy American requirements or domestic sourcing preferences, Southwire is a natural fit. The company is investing over $1.5 billion in manufacturing and distribution modernisation, including a 1.2-million-square-foot distribution centre in Georgia, expected to come online in 2026.

5. LS Cable & System

Best Fit For: International grid and offshore energy projects in Asia and North America

LS Cable & System is a South Korean manufacturer with projects across 50 countries, with its strongest presence in Asia-Pacific, the Middle East, and increasingly North America. The company is dominant in Vietnam's cable market and active across Southeast Asia on grid and renewable projects.

In the U.S., it broke ground in 2025 on LS GreenLink Phase 1 with a a $681 million subsea cable manufacturing facility in Chesapeake, Virginia. This signals a long-term commitment to the North American transmission market. Its portfolio covers land-based and submarine HV transmission systems, and its growing North American manufacturing footprint makes it more relevant to U.S. utility procurement than it was even two years ago.

6. NKT

Best Fit For: European offshore wind and HVDC interconnection

NKT specializes in high-voltage power cable systems for transmission infrastructure and renewable energy integration, with a high-voltage order backlog of €10.8 billion — roughly 50% interconnectors and 45% offshore wind export cables, the majority placed by European transmission system operators.

The company is particularly active in offshore wind transmission and HVDC interconnection. NKT holds a strong position in European grid modernization, and its focus on the energy transition has made it a frequent supplier on cross-border interconnection and offshore wind farm export cable projects. For example, the company is supplying the 525 kV HVDC cable system for the Bornholm Energy Island project, a 200 km offshore route linking Danish and German grids that is among the largest hybrid offshore wind transmission systems in Europe.

7. Sumitomo Electric

Best Fit For: High-specification national grid and subsea transmission programs

Sumitomo Electric is a Japan-headquartered manufacturer with over a century of experience in subsea cable, active across Asia-Pacific, Europe, and the Middle East. The company is expanding aggressively into European transmission infrastructure — it broke ground on a £350 million subsea cable factory at the Port of Nigg in Scotland in 2024.

Its technical depth in high-specification transmission systems and long project timelines make it most relevant to large national grid programs rather than routine utility distribution procurement.

8. Hellenic Cables

Best Fit For: Renewable energy and cross-border interconnection projects

Hellenic Cables is a Greek company that manufactures medium- and high-voltage cable systems for subsea transmission, offshore wind, and utility-scale energy infrastructure. The company has expanded its production capacity specifically to serve the growing demand for submarine and offshore export cables in European energy transition projects.

Its manufacturing investments in high-voltage submarine cable have positioned it as a direct competitor to larger European cable manufacturers on offshore and cross-border interconnection work.

9. Furukawa Electric

Best Fit For: Asian grid infrastructure and industrial electrification

Furukawa Electric is a Japan-headquartered manufacturer with over a century of experience in submarine power cable, active primarily across the Asia-Pacific, with project work extending into Southeast Asia, Singapore, and the Philippines. The company's utility portfolio includes XLPE transmission cable, ultra-high-voltage underground systems, and submarine power cables for offshore wind and grid interconnection. Its recent project work includes a large-scale ultra-high-voltage cable-laying project in Singapore and a submarine transmission contract in the Philippines. Furukawa is less prominent than Prysmian, NKT, or Sumitomo in European and North American utility markets, but holds a strong position in Asian grid infrastructure and electrification projects where its long manufacturing history and technical depth are well established.

10. KEI Industries

Best Fit For: Cost-competitive utility and infrastructure projects in emerging markets

KEI Industries is an Indian company that manufactures medium- and high-voltage cable for utility, industrial, and infrastructure markets, with a significant export presence built over the past decade. The company has grown its international footprint by competing on price and lead time in markets where transmission and distribution infrastructure investment is expanding rapidly.

Its manufacturing scale and competitive positioning make it a practical option for cost-sensitive utility and infrastructure projects with standard specification requirements.