215.15 Barriers.

The required barrier ensures that no energized terminal is exposed to inadvertent contact by people or equipment while servicing load terminals in the panelboard.
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The required barrier ensures that no energized terminal is exposed to inadvertent contact by people or equipment while servicing load terminals in the panelboard.

215.15. Barriers. Revise to read as follows:

Barriers shall be placed in panelboards, switchboards, switchgear, and motor control centers such that no energized, uninsulated, ungrounded supply terminal is exposed to inadvertent contact by persons or maintenance equipment while servicing load terminations.  This requirement shall be applied to the supply terminals of equipment supplied by feeder taps as covered in 240.21(B) or by transformer secondary conductors as covered in 240.21(C), in all instances where the equipment disconnecting means is located within the same enclosure, or is located remotely and also controls other loads.

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

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215.15 Barriers.

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

Which of the following is true in Section 215.15 in Massachusetts?

A: Barriers are never required.
B: Barriers are the same as power distribution blocks.
C: Barriers are required to cover the equipment grounding terminals.
D: The required barriers ensure that energized, uninsulated, ungrounded busbars and terminals won’t be inadvertently contacted when working on switchboards, switchgear, panelboards, or motor control centers that are supplied from the load end of feeder tap conductors.
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