Arc Flash Label Checker
Enter what is printed on an existing label. The check reads back what each value means, compares the label against what NEC 110.16 and NFPA 70E require it to show, and gives the date the study is due for review.
Checks label content against the selected NEC and NFPA 70E editions. Results do not verify the assessment, table-method applicability or exceptions, or authorize energized work.
Enter the information printed on the label to check labeling requirements and the assessment review deadline.
Building label list
Check each label, then add it here to audit a whole building. The list stays in this browser only.
How this tool works
This tool reads the entered values; it does not perform a new assessment. Incident energy is not converted into a PPE category. The category reference uses the minimum clothing ratings in NFPA 70E-2024/2027 Table 130.7(C)(15)(c). Equipment, fault-current, clearing-time and working-distance limits must also be met. Glove references use the AC rms maximum-use voltages and notes in OSHA 29 CFR 1910.137 Table I-4.
NEC 2020 section 110.16(B) covers service equipment rated 1200 A or more and lists four label items, with an industry-practice-label exception. NEC 2023 covers service and feeder-supplied equipment rated 1000 A or more and requires an industry-practice arc flash label with the date it was applied. The general warning in 110.16(A) still applies to equipment within its scope.
The content check assumes equipment likely to require examination, adjustment, servicing or maintenance while energized. NEC 2026 section 110.16 covers service and feeder-supplied equipment outside dwelling units, without an amperage threshold. Confirm equipment scope, applicable exceptions and the locally adopted edition.
NFPA 70E-2024 and 2027 require accuracy reviews at intervals no longer than five years. The clock can use a documented review of the existing assessment; a new study or label is not automatically required every five years. Changes that could affect results require an assessment update, and inaccurate labels must be updated.
This tool is a free reference aid. It does not perform an engineering analysis, and it is not a professional engineering determination or a substitute for an arc flash study sealed by a licensed Professional Engineer. The authority having jurisdiction and the code edition it has adopted govern. Use is subject to our Terms. Book a study →