OSHA 29 CFR 1910.303
Primary US source for disconnect and circuit marking provisions; not a certification of this site labels.
View detailsResource Guide
Panel Directory Labels vs Breaker IDs
A door directory says what each circuit serves. A tiny number beside a breaker points to the right row. If the two lists disagree, better printing only makes the wrong information easier to trust.
Published 2026-10-06
Digital proof before production. Material and adhesive options are discussed according to your application requirements.
Quick Answer: Make One Approved Schedule the Source
The facility electrical owner should provide a verified circuit list and panel ID. Use that list to generate the door directory and the corresponding breaker number set. The printer should reproduce approved text and layout, not determine which load a breaker controls. In the US, OSHA 29 CFR 1910.303(f) addresses legible purpose marking for certain disconnecting means and circuits and durability of those markings; applicability and final electrical approval belong to the responsible qualified parties.
An Illustrative Door Replacement
Imagine a maintenance buyer replaces a corroded panel door. The old schedule lists FAN on circuit 02; a later drawing calls it EXHAUST. This is a composite example, not an inspection report. Copying the old sheet would be fast and wrong. The qualified owner checks the current circuit record, approves the new wording and marks the superseded version. The tiny breaker 02 label and directory row should then come from the same approved file.
Separate Three Physical Layers
A panel ID belongs where staff identify the cabinet. The circuit directory belongs where an authorized reader can consult the approved list. Individual breaker numbers sit near the intended devices without covering manufacturer markings, operating parts or warnings. A dense directory is not improved by squeezing more type into a narrower label; measure the available door area and proof it at actual size. The buyer should confirm the location, access and attachment method before ordering.
Proof Against a Numbered Photograph
Ask for a straight-on photograph of the open panel, a numbered row map and the approved schedule revision. Check the printed set row by row, including unused or spare positions, before installation. If rows shift after a component change, revise both the directory and small labels as one job. The image in this guide is a fictional staged panel and must not be used as a wiring reference.
- PANEL: unique cabinet ID and location.
- ROW: breaker number tied to approved purpose text.
- REVISION: owner, date and superseded schedule handling.
- SURFACE: door and breaker-area material for label tests.
- PROOF: installed-view image at actual print size.
What to Send for a Quote
Provide the approved schedule spreadsheet, panel photographs, finished sizes, number of cabinets, directory mounting area, breaker numbering convention and required revision workflow. Say whether the directory is a replaceable sheet, a protective insert or an adhesive print. Ask for one sample panel set, not an unsupported claim that the print makes the electrical installation compliant.
FAQ
Questions Buyers Ask
Can the printer assign circuit names from a photograph?
No. A qualified facility owner must verify the circuit schedule. The printer can reproduce the approved directory and matching IDs.
Should breaker numbers and the directory be ordered together?
Usually they should share the same approved source and revision so a row change does not leave mismatched labels.