Panel Schedule Builder Calculator

Full NEMA panel circuit directory — PDF, CSV, and JSON export

Document every circuit in a panelboard using the standard odd-left / even-right NEMA layout. Multi-pole breakers span consecutive slots in the same column. Export a printable PDF directory, CSV spreadsheet, or JSON save file. The connected-load summary is a raw VA tally — not an NEC demand calculation.

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How to use: Fill panel header fields, click any slot to add or edit a circuit, then Export PDF directory or Export CSV. Use Save (JSON) and Load (JSON) to resume later. Size individual circuits first with the Panel Schedule Calculator; apply NEC demand factors with the Residential or Commercial Load Calculator.

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Panel Directory & Labeling Tools

Field tools that help with schedule accuracy, breaker tracing, and legible panel labels.

Labels

Brother PT-D210 Label Maker

Print legible circuit labels for panel directories
Handheld labels for breaker and wire ID
Common companion when updating schedules

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Finder

Klein Tools ET310 Circuit Breaker Finder

Trace branch circuits while updating directory labels
Speeds schedule cleanup on existing panels
Includes GFCI testing support

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Meter

Klein Tools CL800 Digital Clamp Meter

Measure branch current while validating panel loads
True RMS readings for mixed load types
Useful for leg balance checks in the summary

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As an Amazon Associate, TestTalkHQ earns from qualifying purchases. Prices and availability may change.

NEMA Odd/Even Layout

Circuit 1 is top-left, 2 top-right, counting down each column. Multi-pole breakers occupy consecutive numbers in the same column (e.g., a 2-pole at 5 uses 5 and 7). The PDF export mirrors this convention with phase letters on each row.

Connected Load vs NEC Demand

The summary cards sum the VA you enter and split it across phase legs by physical slot assignment. That helps spot leg imbalance and document connected equipment — it does not apply Article 220 demand factors, continuous-load 125%, or largest-motor rules. Use the residential or commercial load calculators for service sizing.

Panel Schedule Builder Calculator

Electrical

Electrical Reference Card

Complete Electrical Reference Guide

Electrical Job Estimator

Electrical Complete Bundle

Panel Directory & Labeling Tools

Brother PT-D210 Label Maker

Klein Tools ET310 Circuit Breaker Finder

Klein Tools CL800 Digital Clamp Meter

NEMA Odd/Even Layout

Connected Load vs NEC Demand

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