What is the biggest electrical takeoff risk?

Homerun and routing assumptions — the drawn path is a schematic, not the installed length.

Should fixtures come from the schedule or the plans?

Count symbols on the plans, price types from the schedule — they must reconcile to the same total.

Takeoff Guides

Electrical Takeoff Guide

Short answer

An electrical takeoff counts fixtures, devices, and equipment by symbol — each as EA — measures conduit and wire runs in linear feet, and reconciles everything against the panel schedules, fixture schedule, and one-line diagram.

Electrical takeoff is a counting exercise with a measuring tail: most of the quantity lives in symbols — receptacles, switches, fixtures, devices — and the rest in runs of conduit, wire, and tray between them.

The symbols mean nothing without the schedules. Fixture types, device types, and panel assignments all resolve through the schedules and the one-line, so takeoff bounces constantly between symbol and table.

What to count and measure

Receptacles, switches, and devices by type — GFCI, dedicated, WP kept separate.
Light fixtures by schedule letter/type.
Equipment connections — mechanical and kitchen equipment needing power.
Conduit and wire runs — homeruns plus branch runs.
Panels, transformers, disconnects from the one-line.
Fire alarm and low-voltage devices if in scope.
Site/underground runs on the site plan at its own scale.

Electrical takeoff units

Item	Unit	How measured
Fixtures, devices, equipment	EA	Symbol counts, by schedule type
Conduit	LF	Measured runs, by size and material
Wire	LF	Conduit LF × conductors per run
Cable tray	LF	Measured runs, by width
Panels, transformers, gear	EA	From one-line and panel schedules
Sleeves, boxes, supports	EA	Count or allowance per spec

Symbols first, schedules always open

Count by symbol type, not by eyeball — a duplex and a GFCI duplex look nearly identical but price differently. AI Takeoff detects repeated symbols across sheets; the estimator verifies the counts and assigns each type its schedule identity.

Runs are the error source

Conduit quantities fail on routing assumptions, not counting. A homerun drawn as a straight line to the panel is priced on the actual routed distance — plus risers and drops that are never drawn. Measure what is drawn, then apply your convention for the verticals.