Why it matters, commodity
Refined copper
Conductor metal for windings, cables and building wiring. Mined, smelted and refined; recycled scrap is a significant secondary supply.
- Depends on
- 0
- Depended on by
- 2
- Metrics
- 0
Neighbourhood: what depends on it (left), what it depends on (right)
- Candidate
- Hypothesized
- Mechanism supported
- Causally supported
- Established relation
Systems that would feel a shortage
Downstream: what depends on it
Power transformer requires input Refined copper3 evidenceEstablished relation
Power transformer depends on Refined copper.
Mechanism
Transformer windings are conductors carrying the full load current. Copper is the standard winding material for its conductivity and mechanical strength; aluminum windings are used in many distribution transformers at a larger cross-section.
Evidence
- documentUSGS, Copper statistics and informationusgs.govEnd uses (building construction, electrical and electronic products) and substitutes (aluminum in power cables and some transformer windings).checked 2026-09-07
- documentIEA, The Role of Critical Minerals in Clean Energy Transitionsiea.orgCopper and aluminum intensity of grids and electrical equipment.checked 2026-09-07
- sourceUSGS National Minerals Information CenterSeeded source; commodity summaries are the cited documents.checked 2026-09-07
Substitutes for Refined copper
- aluminum Aluminum windings, larger cross-section for the same current; common in distribution transformers.
- Status
- established_identity_or_engineering_relation
- Reviewer confidence
- 0.95
- Stated strength
- 0.80
- Lag
- not stated
- Version
- curated_seed_v1
- Reviewed
- 2026-09-07
Confidence and strength are curated judgements recorded with the edge, not measured quantities.
Residential construction requires input Refined copper1 evidenceEstablished relation
Residential construction depends on Refined copper.
Mechanism
Building wiring and much plumbing use copper; USGS reports building construction as the largest copper end use in the United States. Aluminum wiring at a larger gauge is the conductor substitute.
Evidence
- documentUSGS, Copper statistics and informationusgs.govEnd uses (building construction, electrical and electronic products) and substitutes (aluminum in power cables and some transformer windings).checked 2026-09-07
Substitutes for Refined copper
- aluminum Aluminum branch wiring and service entrance cable at a larger gauge.
- Status
- established_identity_or_engineering_relation
- Reviewer confidence
- 0.90
- Stated strength
- 0.50
- Lag
- not stated
- Version
- curated_seed_v1
- Reviewed
- 2026-09-07
Confidence and strength are curated judgements recorded with the edge, not measured quantities.
Inputs it cannot do without
Upstream: what it depends on
No stored inputs for this entity.
Measured, from the catalog
Linked metrics
No catalog metric is linked to this entity yet.
Named on the edges that depend on it
Substitutes
- Primary aluminum
Aluminum windings, larger cross-section for the same current; common in distribution transformers.
on edge Power transformer to Refined copper Established relation
Derived from curated edges
Bottleneck centrality
- Score
- 3.98
- Downstream entities
- 12
- Direct dependents
- 2
Sum over every entity downstream (within six hops) of the strongest path weight to it, where each edge weighs its stated strength divided by one plus its named substitutes. A graph statistic over curated edges, not an observation. Computed 2026-09-07 22:42 UTC.
Edges without a dependency direction
Associations
Primary aluminum substitutes for Refined copper2 evidenceMechanism supported
Association, no dependency direction.
Mechanism
Aluminum substitutes for copper in power cables, busbars and some transformer windings where weight and cost outweigh its lower conductivity.
Evidence
- documentUSGS, Copper statistics and informationusgs.govEnd uses (building construction, electrical and electronic products) and substitutes (aluminum in power cables and some transformer windings).checked 2026-09-07
- documentUSGS, Aluminum statistics and informationusgs.govEnd uses in transportation, electrical and construction; substitution with copper.checked 2026-09-07
- Status
- mechanism_supported
- Reviewer confidence
- 0.90
- Stated strength
- not stated
- Lag
- not stated
- Version
- curated_seed_v1
- Reviewed
- 2026-09-07
Confidence and strength are curated judgements recorded with the edge, not measured quantities.
Curated paths this entity is part of
Chains
Names that resolve to this node
Aliases
- Cu
- copper cathode
- refined copper
- usgs: copper (copper)
slug copper, updated 2026-09-07 22:42 UTC