Electrical & Arc Flash Labeling
Arc flash and shock hazard labels, panel directories, fault current markings, disconnect ID, and PV placards — built to NFPA 70E and the NEC articles your inspector is reading from.
Where this usually starts
The gear is installed. The labels are on the punch list.
Electrical marking is rarely the interesting part of a job, and it is almost always the last part. It is also the part an inspector can evaluate in fifteen seconds without opening anything.
We take whatever you already have — an arc flash study PDF, a panel schedule spreadsheet, a one-line, or a phone photo of the nameplate — and turn it into labels that carry the right data on a substrate that will still be readable when the warranty period ends.
Incident energy, boundaries, and clearing times come from a qualified engineer’s analysis. Send us that output and we will format it correctly, consistently, and durably. If you do not have a study yet, that is the step before this one.
Illustrative values. Every field comes from your study.
Code reference
What the article says, and what we hand you.
A working reference for the markings that come up most often on commercial and industrial electrical work.
| Reference | What it requires | What we supply |
|---|---|---|
| NEC 110.16(A) | Arc-flash hazard warning on switchboards, panelboards, industrial control panels, meter socket enclosures, and motor control centers outside dwelling units that are likely to be examined or serviced while energized. | ANSI Z535.4 warning labels, sized to the gear and applied where they stay visible after the doors are closed. |
| NEC 110.16(B) | Service equipment rated 1200 A or more requires a label giving nominal system voltage, available fault current, clearing time of the service overcurrent device, and the date applied. | Four-field service equipment labels populated from your study, with a permanent date field. |
| NEC 110.21(B) | Field-applied hazard markings must use effective words, colors, or symbols per ANSI Z535.4, must not be handwritten, and must be durable enough for the environment involved. | This is the article most rejections cite. Every label we make is machine-marked and specified to the install environment. |
| NEC 110.22(A) | Each disconnecting means legibly marked to indicate its purpose, unless the purpose is evident from its location and arrangement. | Engraved two-ply or metal disconnect plates, drilled or adhesive-backed. |
| NEC 110.24(A) | Service equipment outside dwelling units field-marked with the maximum available fault current and the date the calculation was performed. | Available fault current labels with a durable, laser-marked date field — not a write-on blank. |
| NEC 230.66 | Service equipment identified as suitable for use as service equipment. | Identification plates matched to the equipment listing. |
| NEC 240.87(B) | Where an arc energy reduction method is applied, the equipment is marked to indicate which method is in use. | Method-specific labels — zone-selective interlocking, differential relaying, maintenance switching, and the rest. |
| NEC 408.4(A) | A circuit directory at each panelboard, identifying each circuit’s specific purpose in enough detail to distinguish it from every other circuit. | Laser-marked directory cards and adhesive schedules produced from your panel schedule — typeset, not handwritten. |
| NEC 408.4(B) | Panelboards and switchboards supplied by a feeder marked to show the device or equipment where the supply originates. | Source-of-supply labels tied to your one-line. |
| NEC 690.13(B) | Photovoltaic system disconnecting means marked to identify it as a PV system disconnect. | PV disconnect placards in the required wording, on UV-stable substrate. |
| NEC 690.53 | DC photovoltaic circuit information at the DC disconnect. | DC circuit data placards populated from the array design. |
| NEC 690.56(C) | Rapid shutdown marking for buildings with PV, in the format and wording the article specifies. | Rapid shutdown labels built to the required layout, on outdoor-rated material. |
| NEC 700.7 / 701.7 / 702.7 | Signs at the service entrance identifying the type and location of on-site emergency, legally required standby, or optional standby power sources. | Standby and emergency power source signage, plus ATS and generator identification. |
| NEC 705.12 | Marking at the point of interconnection for interconnected power production sources. | Interconnection and dual-source warning placards. |
| NFPA 70E 130.5(H) | Equipment labels carrying nominal system voltage, arc flash boundary, and at least one of: available incident energy with the corresponding working distance, arc flash PPE category, minimum arc rating of clothing, or site-specific level of PPE. | Full arc flash labels generated directly from your study export — one row per piece of equipment, no retyping. |
Summarised for working reference. Always confirm against the code edition adopted by your authority having jurisdiction — this table is not a substitute for the published standard.
Florida adopts the NEC through the Florida Building Code, and the edition in force depends on the cycle your permit was pulled under and on any local amendments. Tell us the edition your AHJ is enforcing and we will match the wording and format to it.
Products
What we make for electrical work.
Arc flash & shock hazard labels
Populated from your incident energy analysis. Available with either the incident energy value or the PPE category method — NFPA 70E does not permit both on one label.
Panelboard circuit directories
Typeset from your panel schedule, laser-marked on card or adhesive polyester. Legible circuit descriptions, not “RECEPTS” repeated eleven times.
Available fault current labels
The 110.24 marking with a permanent calculated value and calculation date, sized for the service equipment door.
Disconnect & equipment ID
Engraved plates for disconnects, starters, transformers, switchgear sections, and MCC buckets. Drilled, radiused, or adhesive-backed.
Photovoltaic placards
Rapid shutdown, DC disconnect, PV system disconnect, and interconnection markings on substrates rated for rooftop UV exposure.
Generator, ATS & standby
Emergency and standby source signage, transfer switch identification, and load-side warning markings.
Conduit & raceway marking
Voltage and system identification for conduit runs, junction boxes, and pull boxes — including the colour coding your spec calls out.
Series-rated & special notices
Series combination ratings, available short-circuit notices, and any other field-applied marking your engineer of record specifies.
Material selection
Pick for the room, not the catalogue.
The same label specification behaves very differently inside a conditioned electrical room than it does on a rooftop disconnect in July.
- Conditioned indoor gear roomsLaser-markable polyester with acrylic adhesive. Thin, conformable, cost-effective, and stable indoors for years.
- Rooftop, exterior, and PVAnodized aluminum or heavy outdoor-rated polyester. UV is the failure mode here, not abrasion.
- Wash-down, coastal, and corrosiveStainless steel, fiber-laser marked. No coating to lift, nothing for salt to get under.
- Disconnects and equipment IDTwo-ply engraving stock, drilled and mechanically fastened where adhesive is not appropriate.
Send us the spec. We’ll send back a quote.
Panel schedule, arc flash study, valve list, a photo of the equipment nameplate — whatever you have. We’ll tell you what the code requires, recommend a substrate, and price it.