AEC definitions
A panel schedule is the table for one electrical panel. Each row is a circuit: breaker size, poles, the load it serves, and often the calculated volt-amperes. The panel name on the schedule must match the one-line diagram and the label on the equipment.
Definition
Estimators, reviewers, and the field all use the schedule. It is how you see whether a panel has spare capacity and whether a required circuit, such as a fire alarm or a mechanical unit, exists. The physical directory in the panel door should match the schedule at closeout. A schedule that was never updated after a change is how the wrong breaker gets turned off. Loads on the schedule support the feeder and the utility service. They are not decorative.
In depth
The circuit number, the poles, the breaker ampacity, the description, and the load. A two-pole breaker occupies two rows. Counting those as two separate 120 volt circuits double-counts the panel.
The header states voltage, phase, the main breaker, and the fed-from source. That source must exist on the one-line.
LP-2A on the schedule, the one-line, the room sign, and the shop drawing should be identical. Informal names get someone hurt during a lockout.
Descriptions should say the room, not 'receptacles.' A directory that says 'misc' is not a directory.
The design should show connected load and the demand the code allows. A panel drawn full, with no spares, will be full the first time someone adds a circuit. Say how many spares were provided.
Adding a circuit in the field without recalculating the feeder is how a panel is overloaded quietly.
A mechanical unit added by change order needs a circuit, a breaker, and maybe a feeder change on the one-line.
Cloud the schedule. At closeout, issue the record schedule the facilities team will trust.
Examples
Panel LP-1 is fed from PP-1 on both the schedule header and the one-line. Circuit 7 is a 20 amp breaker for the copy room.
A two-pole breaker for a heater is shown across two circuit numbers. The load is counted once.
The as-built directory in the panel door matches the record panel schedule, including two circuits added by change order.
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