Five cable accessory makers in China draw attention as 2026 market nears $38 billion

China’s cable accessories sector is drawing scrutiny in 2026 as grid upgrades and power infrastructure spending keep demand elevated. Five manufacturers and industry participants stand out for their cable connection, insulation, sealing and protection products, while buyers are being pushed to verify voltage ratings, test data and installation fit before procurement.

Why it matters: - China-based suppliers are operating in a global cable accessories market that Global Market Insights values at $35.84 billion in 2025 and projects at $37.88 billion in 2026. - Asia-Pacific remains the largest and fastest-growing regional market, driven by grid modernization and power infrastructure investment. - Procurement decisions depend on product fit, not just supplier size, because cable accessories must match voltage class, cable construction, installation conditions and test documentation.

What happened: - The review highlights five China-linked companies in the cable accessories supply chain: Ningbo Tonyhoo Electrical Technology, CHANG LAN TECHNOLOGY GROUP, CYG Electric Power Technology, Jiangsu Amcore Electric and Shenzhen Woer Heat-Shrinkable Material. - The companies cover different parts of the value chain, from complete cable connection components to heat-shrinkable materials used for electrical insulation and protection. - Tonyhoo, CYG and WOER have the most detailed public product descriptions in the source material, while CHANG LAN and Jiangsu Amcore are flagged for further catalogue and document review.

The details: - Tonyhoo was founded in 1997 in Yinzhou District, Ningbo, Zhejiang Province, and manufactures cable accessories and power environmental protection materials. - Tonyhoo says it has 12 trademark certificates, more than 60 patents, a 9,900 m² facility, about 100 employees, 20 R&D engineers and annual production capacity of about 200,000 units. - Tonyhoo says exports account for about 50% of output, with overseas markets including the United States, Thailand, Albania, Vietnam, Tunisia, Russia and Saudi Arabia. - Tonyhoo says its products have been tested by the State Grid High Voltage Testing Center, SGS or the Shanghai Cable Research Institute. - Tonyhoo’s catalogue includes cold shrink intermediate joints for 10 kV and 35 kV systems, with listed cable classes of 8.7/10 kV, 12/20 kV and 19/35 kV and conductor cross-sections of 25–400 mm². - Tonyhoo lists cold shrink terminations, heat shrink terminations, separable connectors, cable lugs, oil-immersed transformers, polyurethane sealant, explosion-proof blankets, aluminum-magnesium alloy protection housings, stainless-steel explosion-proof housings and cross-interconnection grounding boxes. - Tonyhoo’s DS/SC separable connector series is listed for 10 kV applications with a rated current of 630 A, one-minute AC withstand voltage of 42 kV, lightning impulse withstand voltage of 95 kV and partial discharge of no more than 10 pC. - Tonyhoo’s DT/SC cable lug series uses tin-plated copper and is listed for 10–400 mm² conductor cross-sections, with an operating-temperature range of -40°C to 125°C. - Tonyhoo’s heat shrink termination models SY10kV, SY26kV and SY35kV are listed for 8.7/10 kV, 12/20 kV and 19/35 kV applications, with a 2:1 shrink ratio and a stated withstand-voltage test of 39 kV for five minutes. - CHANG LAN TECHNOLOGY GROUP is identified as a China-based company associated with cable connection and insulation products, though the source does not give model-level product detail. - CYG Electric Power Technology publicly describes cable accessories from 1 kV to 500 kV, including cold-shrink and prefabricated terminations, intermediate joints, cable connection technologies and cable monitoring solutions. - Jiangsu Amcore Electric is included as a Jiangsu-based company tied to electrical equipment and cable accessories, with suitability to be checked against current product documentation. - WOER focuses on cross-linked materials and heat-shrinkable products used in electrical insulation and mechanical protection, including heat-shrink tubing, heat-shrink power cable accessories, cold-shrinkable cable accessories, pre-moulded accessories and separable connectors. - The source also cites industry references that matter to buyers, including IEEE 1816-2024 for preparing shielded cables rated from 2.5 kV through 46 kV and HS heading 8544, which does not separately identify all cable accessory products. - GMI reported that the heat shrink cable accessories segment was worth $2,113.7 million in 2024 and that the cold shrink tubing market reached $2.38 billion in the same year.

Between the lines: - The market is fragmented, so suppliers compete on documentation, voltage coverage, installation method and material performance rather than on a single product category. - Cold shrink and heat shrink systems continue to coexist because project conditions vary, especially where open-flame installation is restricted or where heat shrink installation is operationally simpler. - Tonyhoo’s broad catalogue suggests a combined play across connection, protection and sealing products, while CYG and WOER appear more specialized in large-voltage or materials-led portfolios. - For buyers, public product descriptions are only a starting point; type-test reports, routine-test records and destination-market conformity documents determine whether a product can actually be approved.

What's next: - Buyers will likely keep screening suppliers by rated voltage, cable construction, conductor cross-section and installation environment before narrowing a shortlist. - Projects that need complete medium-voltage joint kits will require a different vendor set than those sourcing shrinkable materials or mechanical protection housings. - Supplier qualification will continue to hinge on current datasheets, test evidence and installation instructions rather than catalogue language alone.

The bottom line: - China’s cable accessories market in 2026 rewards suppliers that can prove compatibility, performance and documentation, not just breadth of product line.