Article 440.

The interior fan unit of a mini-split HVAC system does not have a hermetically sealed refrigerant compressor motor but will often have a motor that is 1/8 HP or less.
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The interior fan unit of a mini-split HVAC system does not have a hermetically sealed refrigerant compressor motor but will often have a motor that is 1/8 HP or less.

MA amendments.

440.14. Insert a second informational note as follows:

Informational Note No. 2: Article 440 generally only applies to equipment that incorporates hermetic refrigerant motor-compressors. See also 430.109(B) for specific provisions governing the disconnecting requirements for such equipment, wherever located, that uses a motor that is 1/8 hp or less.

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

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Article 440.

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

In Massachusetts, which of the following it true of HVAC equipment that does not incorporate a hermetic refrigerant motor compressor?

A: Article 445 provides specific provisions governing the disconnecting requirements for such equipment, wherever located, that uses a motor that is 1/8 hp or less.
B: Section 430.109(B) provides specific provisions governing the disconnecting requirements for such equipment, wherever located, that uses a motor that is 1/8 hp or less.
C: Section 450.3 provides specific provisions governing the disconnecting requirements for such equipment, wherever located, that uses a motor that is 1/4 hp or less.
D: Section 425.3 provides specific provisions governing the disconnecting requirements for such equipment, wherever located, that uses a motor that is 1/2 hp or less.
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