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Electricalaka: wireaka: cable

Conductor

In Plain English

The wire or cable that carries electricity from one point to another in an electrical system.

Definition

Any material, typically a copper or aluminum wire, that allows electrical current to flow through it. Conductors are sized by gauge or cross-sectional area (AWG or kcmil) based on the current they must carry. Insulated conductors are rated for specific voltage levels and environmental conditions.

Why It Matters in Bidding

Conductors are a core electrical takeoff quantity, priced by linear footage and gauge, and copper price volatility makes them a real margin risk on a bid. Estimators size conductors from the panel schedules and one-line diagram, account for material cost swings, and coordinate wire fill against conduit sizing, because under-sizing or miscounting runs leads to either failed inspections or eroded profit.

Example

From the panel schedule, an estimator lists each feeder and branch circuit, totals the conductor footage by wire size, then prices copper at the current market rate and adds a small allowance for waste and terminations across the electrical scope.

Related Terms

Wire GaugeConduitCircuitAmpere (Amp)

Frequently Asked Questions

Estimators measure circuit run lengths from the drawings, identify the required wire size from the panel schedule, and total footage by gauge. They add waste, terminations, and pull allowances, then apply current per-foot pricing. Conductor and conduit takeoffs are done together so wire fill matches the specified raceway sizes.
Conductor cost is largely raw copper, whose commodity price fluctuates and can move materially between bid and buyout. Estimators may use current pricing, request firm vendor quotes, or note copper escalation as a qualification on long-procurement jobs to protect margin if the market rises before the wire is purchased.
Aluminum costs less per foot but requires larger sizes for the same ampacity and uses different terminations, affecting both conduit fill and labor. The spec dictates which is allowed. Estimators price the conductor type the drawings require and adjust raceway sizing and connection labor accordingly rather than substituting on their own.

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