Arc Flash Label Maker | Heirarc Power System Studies

Educational examples and replacement labels. Replacement study labels must use verified data from an arc flash risk assessment sealed by a licensed Professional Engineer for this exact equipment. Confirm that the assessment still represents the equipment and system conditions before installing a label. Calculator estimates are educational only and must not be placed on equipment.

Label type & arc flash data

Study incident energy PPE category Generic warning

Incident energy (cal/cm²)

Working distance

Arc flash boundary

Equipment

Equipment ID

Nominal voltage

Shock hazard details (optional)

Limited approach boundary

Restricted approach boundary

Glove class

Assessment details

Assessment date

Label application date (optional)

Use the application date when required by the adopted NEC or site program. This is separate from the assessment completion date.

Prepared by

Study reference

Available fault current (kA, optional)

Device clearing time (s, optional)

Enter fault current and clearing time only as documented in the assessment for this equipment.

Signal word

Choose the signal word specified by your site's hazard assessment and labeling program. Voltage and incident energy alone do not select it. Saved labels with an automatic header need a selection before printing.

Print settings

Label size

PDF page format

For equipment use, I will verify the label against the applicable assessment and site labeling requirements. Study-label values must come from a current PE-sealed assessment for this equipment. Calculator estimates and example values are educational only.

Print list

Add labels one at a time, or import a CSV from your study's equipment list. The PDF includes every label in the list, or just the one in the preview if the list is empty. The list stays in this browser only.

About these labels

Replacement labels reproduce verified assessment data for the identified equipment. Reprinting a label does not renew the assessment date. Record the new label application date separately when required by the adopted code or site program.

Study labels carry the nominal voltage, arc flash boundary, and either incident energy with its working distance or a PPE Category, never both. They also carry the assessment completion date required by NEC 2026. The separate application-date field can supply the date required by NEC 2023 and the NEC 2020 four-item label route. The 2020 industry-practice-label exception remains separate. Shock approach boundaries and glove class are optional extras.

The generic label carries no study values. It provides a warning template for review under your site's labeling program. Where equipment-specific values are required, a generic warning does not replace them.

DANGER uses white text on red. WARNING uses black text on orange. The preview and PDF do not verify printed safety colors or certify ANSI Z535 conformity.

Print at 100% scale. Select label material and adhesive for the equipment surface and its exposure to temperature, moisture, sunlight and chemicals. Confirm that the printed text is legible and the label remains securely attached.

Use this tool for educational examples or replacement labels. It formats the data you enter; it does not perform an assessment or verify study accuracy. Replacement study labels require verified data from a current PE-sealed assessment for the identified equipment. Confirm the label content, material, adhesion and legibility before installation. Calculator estimates and example values are educational only. Heirarc accepts no responsibility for labels made with this tool. Use is subject to our Terms. Book a study →