Engraved nameplate color codes: your spec decides

Two published university and airport specifications show how much the colors vary. Northwestern University's Section 26 0553 uses black on white for 120-240V normal power. The Los Angeles World Airports guide specification uses white on black for normal power. A tag that is right on one campus would be wrong at the other.

Northwestern also changes color by voltage: black on orange for 277-600V and black on yellow above 600V. It splits emergency systems too: white on red for life safety loads, red on white for 208/120V emergency and essential loads, and red on white for optional standby. LAWA keeps it simple, with white on black for normal and white on red for emergency. Neither is the universal answer. They are examples of how each owner writes its own rules.

Both specifications we reviewed use NEC articles to define which loads count as emergency, legally required or optional standby, then assign their own colors to each group. So the code shapes the categories, while the owner's spec picks the colors. Panel Tag Co does not claim any color meets the NEC. Ask your engineer which document governs.

This is why we avoid the phrase "NEC color code" for nameplates. The color choice lives in the project specification, which may also reference a facility standard or an owner's design guide. If two documents conflict, the engineer of record or the facility decides. We engrave what the approved schedule says, and the proof shows the colors so the responsible person can check them before production.

Specs usually set a minimum letter height and sometimes the tag height. Northwestern asks for 1/2-inch letters on a 1-1/2-inch tall label for one line indoors, or a 2-inch label for two lines. Outdoors it asks for 1-inch letters on 3-inch or 4-inch labels. LAWA asks for 1/2-inch lettering.

Northwestern also says to increase sizes for equipment mounted high, so the tag reads from the floor. Tag width then follows from the legend length and the letter height. A long legend at 1/2-inch letters needs a wide tag, which is why we ask for the full legend text before quoting sizes. The Engraving Text Length Checker helps you compare legend lengths across the schedule before the proof.

Many specs require mechanical fasteners. Northwestern calls for stainless steel screws that do not change the NEMA or NRTL rating of the enclosure, and rejects stick-on adhesives except epoxy where drilling would compromise the rating. LAWA calls for stainless steel screws or rivets. Tell us which your spec requires, and we will drill holes to match.

If your spec allows adhesive, say so and name the type it allows. If it requires screws, send the hole size and spacing, or let us propose positions on the proof for your approval. The installer decides how to fasten to the enclosure without affecting its rating. We supply the tag with holes where you approve them, and we can quote hardware separately if you ask.

Specs usually ask for the equipment name, voltage and what feeds it. LAWA's example is "PANEL 1LA, 120/208V, 3PH, 4W" on line one, the panel type next, then "FED FROM MS." Northwestern asks nameplates to identify the equipment, its source, voltage characteristics and the load served. Use the exact designations from your drawings.

Keep the legend identical to the one-line diagram and panel schedule, including spaces, slashes and leading zeros. A tag that says "PNL-1LA" when the drawing says "PANEL 1LA" causes confusion during maintenance. Our guide on preserving leading zeros in an engraving file shows how to keep designations intact in a spreadsheet. Send one row per physical tag, even when two tags carry the same text.

Send the identification section of your specification, a tag schedule with one row per tag, and any drawing that shows the nameplate detail. Include the color table, letter heights, material, fastening and quantities. Panel Tag Co then quotes the tags, shows colors and sizes on the proof, and engraves only after the responsible person approves.

Use the downloadable color schedule template to organize this. It has a column for each item a spec usually controls, and sample rows that say "FROM YOUR SPEC" where you fill in the values. Do not guess colors from this article. If your project has no written spec, get the facility manager or engineer to confirm the colors in writing before you order.

• Spec section with the color table (for example 26 05 53)
• Tag schedule: tag ID, legend lines, system, voltage, quantity
• Letter height and tag size, or the drawing detail
• Material named by the spec, such as engraved laminate, aluminum or stainless
• Fastening: screws, rivets or approved adhesive, plus hole size if known
• Name of the person who approves the proof

In this made-up example, a contractor orders nameplates for two similar buildings. One owner's spec matches Northwestern's pattern and the other matches LAWA's. The legend for one panel is "PANEL 1LA 120/208V 3PH 4W" (25 characters) with "FED FROM MDP" (12 characters) on line two. The text is the same for both buildings.

For the first building, the normal-power tag is black letters on white and the life safety panel tag is white on red. For the second, the normal-power tag is white on black and the emergency tag is white on red. The contractor sends two schedules, each with its own color column taken from the governing spec, plus the spec pages. Panel Tag Co shows both color sets on separate proofs, and each project engineer approves their own building's proof.