90.4 Enforcement.

There are two listing labels for this equipment, one for the cutout box and another for the entire industrial control panel including the enclosure.
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There are two listing labels for this equipment, one for the cutout box and another for the entire industrial control panel including the enclosure.

MA amendments.

90.4 Revise the first paragraph to read as follows:

Enforcement. This Code shall be used by the authority enforcing the Code and exercising legal jurisdiction over electrical installations. The authority having jurisdiction of enforcement of the Code shall accept listed and labeled equipment or materials where used or installed in accordance with instructions included with the listing and labeling. The authority shall have the responsibility for deciding upon the approval of unlisted or unlabeled equipment and materials, and for granting the special permission contemplated in a number of the rules.

Click here to see the Massachusetts amendments to the 2023 NEC®.

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90.4 Enforcement.

Below is a Real Question from our Electrical Continuing Education Courses for Electrical License Renewal:

Which of the following is true regarding NEC Section 90.4 as amended in Massachusetts?

A: The electrician shall have the responsibility for deciding upon the approval of unlisted or unlabeled equipment and materials.
B: The engineer of record shall have the responsibility for deciding upon the approval of unlisted or unlabeled equipment and materials.
C: The authority having jurisdiction shall accept listed and labeled equipment or materials where used or installed in accordance with instructions included with the listing and labeling.
D: Acceptance of listed and labeled equipment is not required.
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