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NEC 110.3(B) Under or Over Used As A Code Violation?

jar546

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Adherence to the installation instructions provided by manufacturers is crucial, regardless of whether the equipment itself is mandated to be certified. For instance, under section 210.52 of the NEC, it's permissible for fixed electric baseboard heaters to have receptacle outlets conforming to the requirements for the wall space occupied by these heaters. However, the installation guidance for these permanent baseboard heaters specifically advises against their placement under a receptacle outlet. In residential settings, it's not uncommon to find low-density heating units extending beyond 12 feet. Hence, in order to satisfy both the stipulations of section 210.52(A) and the installation guidelines, either the heating unit should incorporate a receptacle or a receptacle should be positioned on the floor near the wall, but not directly above the heating unit. The Note for Information attached to section 210.52 elaborates on these requirements in detail.

Certification and labeling are the primary means to confirm an equipment’s appropriateness for use. While this particular section does not make certification or labeling mandatory, the Authority Having Jurisdiction (AHJ) might request proof of adherence to section 110.3 before giving approval to the installation.

Certain regulations do necessitate the use of certified or labeled equipment. For example, section 250.8 explicitly requires the use of "certified pressure connectors, grounding and bonding equipment, or other certified means" for connecting grounding and bonding conductors.

Certification agencies typically mandate the display of their certification mark on the product as evidence of compliance. In cases where placing the mark directly on the equipment is impractical, these agencies usually require that the mark be on the smallest packaging unit of the product. As section 110.3(B) necessitates adherence to certification requirements, the presence of the relevant certification mark is required if it is a condition set by the certifying body.
 
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