Section 130.5(H) requires covered labels to show nominal system voltage, the arc flash boundary, and at least one permitted energy/PPE option. The equipment owner is responsible for documentation, installation, and maintenance of required labeling.
Review supporting data for accuracy at intervals not exceeding five years. Evaluate relevant system changes promptly and update labels when the supporting review identifies inaccuracy.
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What an arc flash label must communicate
For covered non-dwelling equipment likely to need energized examination, adjustment, servicing, or maintenance, Section 130.5(H) calls for nominal system voltage, the arc flash boundary, and at least one permitted option: incident energy with working distance; a permitted PPE category; minimum arc rating of clothing; or a site-specific PPE level. When incident energy is used, the corresponding working distance matters. Do not display both incident energy and an arc flash PPE category for the same equipment as alternative labeling selections.
| Field | Check |
|---|---|
| Nominal voltage | Matches current equipment and drawings |
| Arc flash boundary | Value and units are legible and traceable |
| At least one permitted energy/PPE option | Selected option, working distance where applicable, and method limits are clear |
| Optional traceability | Equipment ID, study revision, assessment and review dates do not obscure required data |
Seven-point label walkdown
- Match equipment, location, and one-line identity.
- Check adhesion, damage, obstruction, durability, and legibility.
- Verify required fields and explicit units.
- Trace values to the current assessment.
- Screen sources, conductors, devices, settings, and configuration for change.
- Review supporting data for accuracy at intervals not exceeding five years; evaluate changes promptly and update inaccurate labels.
- Record Verified, Gap, or N/A with evidence, owner, due date, and closure.
The equipment owner is responsible for documentation, installation, and maintenance. Do not repair a technical gap with a marker, approximation, or neighboring label. Keep NEC installation markings, NFPA 70E work-practice information, OSHA duties, and employer conventions distinct.
Use the free NFPA 70E (2027) employer record checklist during the walkdown.
NFPA 70E (2027) employer series
- Arc flash boundary
- Arc flash label requirements (this guide)
- Training requirements
- Electrical safety program
- Energized electrical work permit
Keep label source roles distinct
NFPA 70E addresses safe-work practice information; the NEC addresses installation markings in its scope; OSHA establishes worker-protection duties. A manufacturer warning or generic sticker does not prove an arc flash risk assessment exists. Record which source controls each marking.
Verify the selected presentation
Check Section 130.5(H) for exact fields and allowed presentation. Match equipment ID, nominal voltage, boundary, and displayed PPE or incident-energy basis to controlled evidence. Do not mix incompatible methods or copy a neighboring label.
Required information versus useful traceability
Keep required technical information visually distinct from optional management fields. A reviewer should be able to find nominal voltage, arc flash boundary, and the selected energy or PPE presentation without reading a dense paragraph. Optional equipment ID, study number, revision, calculation date, next review date, QR reference, or owner contact can help only if they remain current and do not cover or contradict the required information.
A review date is not the same as an expiration date. A label can become inaccurate the day after review if the electrical distribution system changes. A pre-2027 label may remain acceptable under Section 130.5(H)’s legacy exception only if it complied with the labeling requirements in effect when applied and subsequent distribution-system changes have not made it inaccurate. Record the original edition, supporting evidence, and review disposition. The evidence chain, not label age alone, supports that conclusion.
During a walkdown, photograph the label only under employer information rules and pair the image with equipment ID, location, observation date, observer, assessment revision, and disposition. A folder of unlabeled photographs is not a usable inventory. Sample across equipment types and locations, then separately track every physical defect, technical discrepancy, missing source, and overdue review. Close each item only after the installed result is read back against approved data.
Legacy and supervised-installation checks
Section 130.5(H) includes two distinct exceptions: qualifying existing labels, and supervised industrial installations where the prescribed engineering and maintenance conditions allow the required information to be documented in a readily available alternative form. Verify each condition independently. Confirm the exact legacy and supervised-installation conditions in 130.5(H) before relying on either. Record the exact condition, equipment, responsible owner, documentation location, accuracy review, reviewer, and end trigger.
| Record | Fictional example |
|---|---|
| Evidence | Study AF-17 rev. 3; one-line E-12 rev. 8 |
| Result | Gap – feeder setting differs |
| Owner / closure | Assessment owner / approved study disposition, label replacement if affected, installed readback |
Separate required information from traceability fields
Required content and optional traceability fields are different categories. Equipment ID, study revision, and assessment date are useful supplementary traceability fields. However, when incident energy is the selected labeling option, its corresponding working distance is required information—not an optional traceability field. More text is not automatically safer.
NFPA 70E, OSHA regulations, NEC installation rules, and employer policy have connected but different roles. Label each source rather than presenting every internal preference as law. A source change can then be traced to affected procedures, assessments, labels, permits, and worker records.
Protective equipment is one control, not a substitute for eliminating exposure when an electrically safe work condition is required. A label is not an assessment, a signature is not justification, and attendance is not task qualification. Clear categories prevent a visible artifact from hiding missing upstream evidence.
Record the walkdown result
Observe labels within normal access rules. Record location, legibility, adhesion, equipment match, visible values, and assessment reference. Route damage to controlled replacement and technical gaps to the assessment owner. Never invent a field value during a walkdown.
Use the 2027 edition carefully
This guide uses NFPA 70E (2027) as its edition reference. Confirm the edition adopted by the employer and check each cited section in the 2027 edition before publication or workplace use. Adoption dates, contracts, and local duties can differ.
Do not copy an older form forward without comparing terminology, conditions, required roles, and numbering. Keep an edition field in procedures, assessments, labels, permits, and review records. When an edition changes, that field locates affected artifacts instead of relying on memory.
Employer review sequence
Use this sequence as a review prompt, then adapt it to the employer’s adopted procedures and assigned authorities.
- Confirm Section 130.5(H) in the adopted edition; keep OSHA 1910.335 duties separate.
- Match the person, task, and equipment identity to current records.
- Record evidence, reviewer, limitations, gaps, owner, and due date.
- Verify field conditions against the approved record.
- Feed changes and findings back into the electrical safety program.
A reviewer should be able to move from field observation to controlled source and back. If a value or approval cannot survive that round trip, keep the item open. Documentation exists to support decisions and reveal gaps, not to produce a perfect-looking file.
Before closing the review, ask an independent reader to locate the source, identify the responsible owner, explain the limitation, and describe what would trigger a new review. If that reader cannot reconstruct the decision from the record, improve the record while the facts are available. Add photographs, equipment identifiers, meeting notes, or observation results only when they support the decision and are stored under the employer’s information rules. Keep corrective actions narrow enough to verify. A broad promise to improve safety is not a closure test; a named change, observed result, responsible person, and completion date are.
Three quotable takeaways
An arc flash label is a field summary of controlled hazard data, not the hazard study itself.
Label review begins with equipment identity and ends with traceable assessment evidence.
A fresh sticker with stale inputs is still stale safety information.
Related NFPA 70E guides
Continue the employer evidence chain with the other four guides in this series:
- Arc Flash Boundary: What It Is and How It Is Set (2027)
- NFPA 70E Training Requirements: Who, When, Records (2027)
- Electrical Safety Program: NFPA 70E Employer Guide (2027)
- Energized Electrical Work Permit: 2027 Employer Guide
Frequently asked questions
Which energy and PPE presentations are permitted?
Section 130.5(H) permits specified alternatives: incident energy with working distance, a permitted PPE category, minimum clothing arc rating, or a site-specific PPE level. Use only an allowed combination and do not mix methods.
Does label age alone require replacement?
No. Review data for accuracy, evaluate changes promptly, and update inaccurate, damaged, or illegible labels.
Can a legacy label remain?
Only when exact 130.5(H) conditions are met and later changes have not made it inaccurate.
Does OSHA specify one label format?
OSHA duties, NFPA 70E work-practice information, and NEC markings have distinct scopes.
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