Material Insights · Understanding the Material World

Copper and Electrical equipment

Copper is the main conductor in cables, motor and transformer windings and switchgear busbars, and it carries the largest weight in India's power transformer price formula; contract price variation clauses pass copper price moves through to buyers.

Copper (commodity) and Electrical equipment (industry): 4 relationships.

How they are linked

1. Industry input

Physical flow · Strong · Copper to electrical equipment

Copper's high conductivity makes it the standard conductor for cables, windings and busbars; the site lists six enterprise types in electrical equipment that depend on it, rating it 4 of 5 for transformer, cable and power-module makers.

  • 6 enterprise types in electrical equipment that depend on copper
  • 43% of India's copper demand in wires, cables and transformers, FY25
  • 23% of US copper use in electrical and electronic products, 2025

In India, wires, cables and transformers made up 43% of copper demand in FY25, and copper demand from industrial motors grew 12%. Because copper is bought as rod and strip priced off metal markets, equipment makers feel copper price moves directly in their input costs.

Enterprise types that depend on it:

  • Power semiconductor and electronic component suppliers: module baseplates (criticality 4 of 5)
  • Power and distribution transformer makers: windings (criticality 4 of 5)
  • Power cable and wire makers: conductors (criticality 4 of 5)
  • Copper and aluminium rod, conductor and winding-wire makers: main conductor (criticality 3 of 5)
  • Switchgear, motor and drive makers: windings and busbars (criticality 3 of 5)
  • Solar inverter, battery system and smart meter makers: magnetics (criticality 3 of 5)

Sources: Material Insights; USGS; The Tribune (International Copper Association India data)

2. Price variation clauses

Cost and price · Strong · Copper price moves pass into equipment prices through contract formulae

Indian utilities and EPC buyers use IEEMA price variation formulae that index the contract price to copper, steel and other inputs between tender and delivery, so the buyer, not the maker, carries most metal price risk.

  • 32% copper weight in the IEEMA power transformer price formula, up to 400 kV
  • 27% copper weight for transformers above 400 kV
  • 6% fixed element in the up to 400 kV formula

In the 2021 formula for power transformers up to 400 kV, copper carries 32% of the price, CRGO steel 27% and only 6% is fixed; copper prices are taken two months before delivery against a base one month before tender. The clauses work both ways, so falling copper lowers the bill too. Makers on fixed-price orders without such clauses carry the metal risk themselves.

Sources: IEEMA; IEEMA

3. Grid build-out

Transition · Rising · Grid and electrification spending drives copper-heavy equipment demand

Transmission and distribution expansion needs cables and transformers in volume, and supply has not kept pace, so equipment prices and copper demand rise together.

  • nearly double real cable costs since 2019
  • about 75% real rise in power transformer prices since 2019
  • US$140 billion world transmission investment, 2023

The IEA reports procurement taking two to three years for cables and up to four years for large power transformers, while world transmission investment grew 10% to US$140 billion in 2023. Prices are measured in real terms, so the rise reflects tight factory capacity as well as metal costs, and copper demand and equipment pricing have climbed together.

Sources: IEA

4. Aluminium conductors

Substitution · Medium · Aluminium can replace copper in some electrical equipment

Aluminium is lighter and cheaper than copper, so it replaces copper in power cable and some electrical equipment, at the cost of larger conductor cross-sections.

The USGS lists aluminium as a substitute for copper in electrical equipment and power cable. Copper keeps its hold where space, reliability and connection quality matter, as in compact motors, switchgear and high-voltage transformer windings.

Sources: USGS

For investors

Key learnings

  1. Copper carries the largest weight, 32%, in IEEMA's power transformer price formula, so equipment revenue in India moves with copper prices.
  2. Price variation clauses shift metal risk to utilities, so on indexed contracts copper moves pass into revenue rather than margins; fixed-price orders carry the risk.
  3. Equipment scarcity matters as much as metal: real cable costs nearly doubled and transformer prices rose about 75% from 2019, with lead times of up to four years.

What to track

  • IEEMA copper basic price circulars: Sets the indexation applied to contract prices (Monthly · IEEMA)
  • LME and MCX copper prices: Drives revenue and working capital for cable and transformer makers (Daily · LME, MCX)
  • Transformer and cable lead times: Longer lead times signal pricing power for makers and delays for grid projects (Quarterly · IEA, utility tenders)

For policymakers

Key learnings

  1. Indexation clauses protect makers but move copper price risk onto utility and state budgets, so copper spikes raise grid project costs.
  2. Wires, cables and transformers are 43% of India's copper demand, so grid targets set a large part of national copper needs.
  3. Equipment capacity, not copper alone, constrains grid build-out: lead times of up to four years for large transformers call for early procurement.

What to track

  • India copper demand by sector: Shows the electrical sector's pull on copper supply (Annual · International Copper Association India)
  • Transmission line and substation additions against target: Shortfalls signal equipment or contracting bottlenecks (Monthly · Central Electricity Authority)
  • Grid investment: Signals future demand for copper-heavy equipment (Annual · IEA World Energy Investment)

India

Wires, cables and transformers took 43% of India's 1,878 kt copper demand in FY25, and IEEMA price variation formulae, with copper weighted at 32% for power transformers up to 400 kV, pass copper prices to utility buyers.

Sources

  1. Electrical equipment: materials, Material Insights (2026)
  2. Mineral Commodity Summaries 2026: Copper, USGS (2026)
  3. India's copper demand rises 9.3 per cent in FY25; ICA calls for strategic reserves planning, The Tribune (International Copper Association India data) (2025)
  4. Price variation clause: power transformers (IEEMA/PVC/PWR TRF, 2021), IEEMA (2021)
  5. Why price variation clause?, IEEMA
  6. Rising component prices and supply chain pressures are hindering the development of transmission grid infrastructure, IEA (2025)