Quick Hits

Episode 2: Disconnecting Means Requirements & Location Rules (440.11 – 440.15)

SLIDE 1 (HOOK / COVER)

⚡ NEC Quick Hit: HVAC Disconnecting Means (Part 2) ⚡

Sizing disconnects for 115% of load, line-of-sight requirements, and split-system identification rules—let's check Sections 440.11 through 440.15! 👇

SLIDE 2 (DISCONNECT RATINGS & AMPERAGE)

Sizing the Disconnect:

• Ampere Rating: A disconnecting means serving a hermetic refrigerant motor-compressor must have an ampere rating of at least 115 percent of the nameplate rated-load current or branch-circuit selection current, whichever is greater.

• Locked-Rotor Equivalence: Horsepower ratings must account for both the full-load condition and the locked-rotor condition combined across multi-compressor or combination loads.

SLIDE 3 (LOCATION AND INDOOR UNIT IDENTIFICATION)

Sight and Accessibility Rules:

• Within Sight & Accessible: Disconnecting means must be located within sight from, and readily accessible from, the air-conditioning or refrigerating equipment.

• Split-System ID: Outdoor disconnecting means for split-system HVAC installations in other than one- and two-family dwellings must be clearly marked with the location of all indoor units they supply.

SLIDE 4 (WRAP-UP)

💡 Apprentice Pro-Tip: Unlike standard motors that allow remote lockable disconnect exceptions under strict industrial supervision, Article 440 HVAC disconnects generally demand a local disconnect within sight and readily accessible from the unit!

💬 Save this post for your next HVAC wiring layout!

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