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Code Question of the Day

The Code Question of the Day (CQD) is NECA and ELECTRICAL CONTRACTOR Magazine’s flagship National Electrical Code (NEC®) public forum for the industry. The daily distribution of Q&A generates a lively dialogue and shares relative Code-based practical responses.

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July 20, 2026

Question:

Hello CQD - Is it legal to split a two pole commercial breaker into two circuits with a shared neutral? And can I get a specific code number for my answer, please. Thank you, Stephan M.

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July 17, 2026

Question:

Hello CQD. Our safety manager is asking what has to be on arc flash warning labels for industrial switchgear. I know labels are required, but is the content specified anywhere in the NEC? Thanks, Frank O.

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Answer:

Hello Frank- New for the 2026 NEC, Section 110.16 requires the label to include the available incident energy or required PPE level, the arc flash boundary, the nominal system voltage, and the date of the study. A label reading only “Warning: Arc Flash Hazard” does not meet the requirement.