Too Small for Labeling


New Member
Mar 19, 2019
Is there a size of breaker that is too SMALL to have labeling required according to NFPA 70E?
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There is no requirement in NFPA 70E - 2018 directly, however, indirectly NFPA 70E - 2018 uses IEEE 1584:2002 (or 2018 - depending on your interpretation) in Annex D. The IEEE 1584 guideline will generally exclude smaller 30A three phase disconnects from the model. This also depends on the approach adopted by the engineer performing the model. I have not come across a small 30A disconnect fed of a small (30A) MCCB that was greater than 1.2cal/cm2. ALWAYS include a label to warn the worker of the lethal shock hazard though!