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Engraved arc flash labels.
Built to NEC 2026 § 110.16.

Engraved two-ply phenolic — a durable alternative to printed adhesive labels. Warning plates manufactured to your arc flash study's incident-energy calculation, arc-flash boundary, and required PPE. Built to your adopted NEC edition and the NFPA 70E-2024 § 130.5(H) durability standard. Stocked in 28 color combinations including all ANSI Z535.4 signal colors — Signal Red, Signal Orange, Signal Yellow. Engraved in Chico since 1982.

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Why engraved for arc flash

NEC 2026 § 110.16 expanded arc-flash marking. Engraved to your spec.

NEC 2026 § 110.16 — renamed "Arc-Flash Hazard Marking" — expanded detailed marking requirements for service equipment and feeder-supplied equipment in non-dwelling occupancies where energized examination, adjustment, servicing, or maintenance is required. The 2023 edition's ≥1000A amperage threshold is gone. Labels must warn effectively, be permanently affixed, and have sufficient durability to withstand the environment involved. NFPA 70E-2024 § 130.5(H) added a matching durability requirement on the workplace-safety side.

We manufacture engraved two-ply phenolic plates — the identification is cut into the material rather than printed on top of it. That construction provides strong resistance to abrasion. Overall service life depends on the substrate grade, mounting method, UV exposure, chemicals, temperature, and installation environment — which is why we match the material to the application at the quote stage. That's the choice made on PG&E service equipment, hospital electrical rooms, and switchgear our contractor customers install every week.

Send us your arc flash study data, equipment description, and required legend. We come back with pricing, material recommendations, and a proof for your approval before anything ships. Reorders match the approved layout already on file.

Where arc flash plates go

The equipment types NEC 2026 § 110.16 covers.

NEC 2026 § 110.16 removed the amperage threshold that previously limited detailed arc flash marking to service and feeder-supplied equipment rated ≥1000A. Detailed marking now applies across the covered equipment types below, in non-dwelling occupancies where energized examination, adjustment, servicing, or maintenance is required.

Switchboards & switchgear
Service-entrance and distribution equipment. Engraved plates mounted on the exterior enclosure with incident energy, arc-flash boundary, PPE requirements, and assessment date.
NEC 110.16 · NFPA 70E 130.5(H)
Enclosed panelboards
Service and feeder-supplied enclosed panelboards in non-dwelling occupancies. Under NEC 2026 § 110.16, detailed marking applies without the previous ≥1000A threshold.
NEC 110.16 (2026 expansion)
Motor control centers
MCC arc flash warning plates covering incident energy at working distance, arc-flash boundary, and PPE category. Engraved to your calculation and equipment ID.
NEC 110.16 · NFPA 70E 130.5(H)
Industrial control panels
ICPs on the manufacturing floor. Engraved arc flash plates matched to facility-wide identification standards, mounted per your drawing.
NEC 110.16 · Facility spec
Meter socket enclosures
Utility metering equipment. Engraved plates carrying signal-word format per ANSI Z535.4-2023 with site-specific hazard data.
NEC 110.16 · ANSI Z535.4-2023
Custom AHJ-driven plates
Non-standard sizes, jurisdiction-specific wording, facility-brand color combinations. Engraved to your exact drawing and specification.
Custom spec
Materials we stock

Engraved for the durability NFPA 70E-2024 § 130.5(H) calls for.

NFPA 70E-2024 § 130.5(H) added an explicit durability requirement: the label shall be of sufficient durability to withstand the environment involved. NFPA 70E is a workplace electrical-safety standard, and its adopted legal status varies by jurisdiction. For humid mechanical rooms, outdoor switchyards, chemical processing facilities, and other harsh installation environments, engraved two-ply phenolic is one durable substrate choice — matched to the actual environment at the quote stage rather than defaulted to.

28
Stock color combinations including all ANSI Z535.4 signal colors.
Signal Red for DANGER, Signal Orange for WARNING, Signal Yellow for CAUTION — with contrasting cores. Plus 25 additional two-ply combinations for facility identification systems, and PMS color match on custom orders for branded programs.
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ANSI Z535.4-2023 signal colors
Signal Red (DANGER), Signal Orange (WARNING), Signal Yellow (CAUTION) with contrasting cores for engraved signal-word plates.
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Engraved, not printed
Identification cut into the material rather than printed on top of it — won't fade, wear off, or peel like adhesive stickers.
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Flame-classified grades
Selected engraving laminates are available with manufacturer-published UL 94 classifications, including V-0 or HB at specified tested thicknesses. Availability and rating verified for the exact product, color, and thickness ordered.
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Nonconductive stock
Selected engraving laminates are electrically nonconductive as described by their manufacturers. This does not constitute a dielectric or electrical-safety certification for the finished installation.
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Cut and drilled to spec
Any dimension, any hole pattern, any mounting method. Adhesive back, drilled, riveted, or screwed to withstand the environment.
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PMS color match on custom orders
Branded facility identification programs — we source PMS-matched engraving stock to your standard, engraved to your drawing.
Related guide
Not sure which material fits? Our engraving materials guide covers what each substrate suits, how it wears, and how to choose one for the environment the tag will live in.
Read the materials guide →
Built to your spec

The code references our arc flash plates are made against.

Current through NEC 2026 § 110.16 arc-flash expansion. Built to NFPA 70E-2024 § 130.5(H) durability standards. We manufacture to customer-provided content, drawings, adopted code editions, and facility specifications. We don't perform engineering studies, calculate incident energy, determine required PPE, or act as the authority having jurisdiction — we make the plate to your spec.

NEC · 2023 → 2026
§ 110.16 — Arc-flash hazard marking
2023 § 110.16(B) dropped the threshold from ≥1200A to ≥1000A on covered service and feeder-supplied equipment. 2026 removed the amperage threshold for detailed marking on service and feeder-supplied equipment in non-dwelling occupancies where energized examination or maintenance is required.
NFPA 70E · 2024
§ 130.5(H) — Equipment labeling
2024 edition added an explicit durability requirement: the label shall be of sufficient durability to withstand the environment involved. Equipment owner responsible for documentation, installation, and maintenance of the marked label. NFPA 70E adoption varies by jurisdiction.
NEC 2023
§ 110.21(B) — Field-applied marking
Three-part rule: markings must adequately warn, be permanently affixed and not handwritten, and have sufficient durability to withstand the environment involved.
NFPA 70E · 2024
Label content requirements
Nominal system voltage, arc-flash boundary, and site-specific PPE data (incident energy at working distance, minimum arc rating of required clothing, or PPE category — one method).
ANSI Z535.4-2023
Signal-word formats
DANGER (white on Safety Red), WARNING (black on Safety Orange), CAUTION (black on Safety Yellow) — the signal-word colors and formats engraved into arc flash warning plates.
OSHA 29 CFR
§ 1910.335 — Safeguards for personnel protection
OSHA's electrical safety standard requires safety signs, safety symbols, or accident-prevention tags to warn employees about electrical hazards. NFPA 70E is the recognized industry consensus standard on electrical safety in the workplace; OSHA may consider recognized industry practices when evaluating workplace electrical hazards.
Review interval
5-year data review
NFPA 70E requires the data supporting the label be reviewed for accuracy at intervals not exceeding 5 years. Update sooner after any system change affecting fault current, protective device clearing time, or equipment configuration.
IEEE 1584-2018
Incident energy method
Underlying calculation standard for incident energy analysis. Your electrical engineer performs the study; we engrave the resulting values onto compliant plates.
Related guide
Working out what the code requires? Our electrical code compliance guide explains what the NEC, NFPA 70E, ANSI Z535.4, ASME A13.1 and OSHA 1910.147 ask of engraved identification — and where our responsibility begins and ends.
Read the code compliance guide →
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Frequently asked

Common questions on engraved arc flash labels.

What material do you use for arc flash plates?
Two-ply engravable laminate. A colored cap layer over a contrasting core, engraved so the signal word and hazard data appear in the core color. We stock 28 color combinations including all ANSI Z535.4-2023 signal colors (Signal Red for DANGER, Signal Orange for WARNING, Signal Yellow for CAUTION) and can custom-source PMS matches for branded facility programs.
What's changing in NEC 2026 for arc flash labels?
NEC 2026 § 110.16 was renamed "Arc-Flash Hazard Marking" and expanded its scope. Under previous editions, detailed arc flash marking was required on service and feeder-supplied equipment rated ≥1200A (2020) or ≥1000A (2023). NEC 2026 removes that amperage threshold — detailed marking now applies to covered service and feeder-supplied equipment in non-dwelling occupancies where energized examination, adjustment, servicing, or maintenance is required. NEC 2026 became available for state adoption in September 2025; enforcement timing varies by jurisdiction.
Can I use vinyl adhesive arc flash labels?
Yes, provided the material meets NEC § 110.21(B) durability requirements — adequately warns of the hazard, is permanently affixed and not handwritten, and has sufficient durability to withstand the environment involved. High-grade UV-rated polyester or vinyl labels can meet that requirement when matched to the installation environment. NFPA 70E-2024 § 130.5(H) added an explicit durability requirement of its own on the workplace-safety side. AHJs have discretion to determine suitability for the installation. We manufacture engraved plates as one durable option — matched to your spec, drawings, and adopted code edition.
What information goes on an arc flash label?
Per NFPA 70E § 130.5(H), the minimum content includes: nominal system voltage, arc-flash boundary, and one of the following — incident energy and corresponding working distance, minimum arc rating of required clothing, site-specific level of PPE, or highest hazard/risk category. Many facilities also include the assessment date, equipment ID, shock protection boundaries, and site-specific PPE data. We engrave whatever your electrical engineer's arc flash study specifies — we don't calculate incident energy or determine required PPE ourselves.
Do you calculate the incident energy for me?
No. Incident energy calculation requires a full arc flash study performed by a qualified electrical engineer using IEEE 1584-2018 methodology or the NFPA 70E PPE category method. That study produces the values that go on the label. We're a manufacturer — we engrave the plates to the specifications your study provides. If you need referrals for arc flash engineering services, ask when you call.
How often should arc flash labels be reviewed?
NFPA 70E requires labels be reviewed at least every 5 years to confirm the underlying data remains accurate. They should be updated sooner after any system change affecting fault current or protective device clearing time — utility transformer changes, feeder or source reconfiguration, protective relay setting changes, new equipment installation, or after a fault event. When you order updated plates, we can match the existing legend format and mounting method exactly.
Can you match my facility's existing arc flash label format?
Yes. Send us a photo, a sample plate, or your facility standard. We match color combination, legend format, signal-word placement, mounting method, and dimensions. Once we have your standard on file, reorders match exactly across every site and every reorder.
Do you handle multi-site or multi-facility programs?
That's a specialty. Standardized templates, per-site variable data (incident energy values, boundaries, equipment IDs), consolidated billing, and consistent turnaround across every location. Currently supporting national and regional arc flash relabeling programs for utilities, contractors, and industrial operators preparing for NEC 2026 adoption.
What's the lead time?
Standard turnaround is 24–48 hours from proof approval. Same-day rush is available for time-critical work — post-incident replacement, imminent inspection, or emergency relabeling. Faster on request when it's a real emergency — call and ask.
How do I order?
Send us your arc flash study results, equipment description, legend text, and any facility-standard formatting requirements. We come back with pricing, material recommendations, and a proof for your approval before anything ships. Reorders match the approved layout already on file. All calls answered live, Monday through Friday, 8:30 AM to 5:00 PM PT.

Get your engraved arc flash plate quote in one call.

Send us your arc flash study, equipment description, and required legend — or your existing plate for a matching reorder. We'll come back with pricing, material recommendations, and a proof for your approval. Reorders match the approved layout already on file.

Request a quote Call (530) 895-8448