Quick Hits

Episode 1: Scope, Listing & Nameplate Requirements (646.1 – 646.6)

SLIDE 1 (HOOK / COVER) ⚡ NEC Quick Hit: Modular Data Centers (Part 1 - Scope & Nameplates) ⚡ 

Preassembled, containerized server rooms delivered straight to the job site—welcome to Article 646. How does a prepackaged modular data center (MDC) differ from a standard site-built ITE room? Let's break down the fundamentals! 👇

SLIDE 2 (SCOPE & CONTAINERIZED DATA CENTERS)

What is a Modular Data Center (MDC)?

• Factory-Built Enclosures: MDCs include installed information technology equipment (ITE), HVAC, power distribution, and grounding housed inside a preassembled, portable equipment enclosure (often called a containerized data center).

• The Difference: While an ITE room (Article 645) is built and equipped on-site inside a permanent building, an MDC arrives prepackaged. Because they are large enough for personnel to enter, they have specific access and working space rules.

SLIDE 3 (MANDATORY LISTING & NAMEPLATES)

Listing and Enclosure Data:

• Listed & Labeled: All MDCs must be listed and labeled (evaluated to standards like UL Subject 2755).

• Permanent Nameplate: Each enclosure must feature a visible permanent nameplate detailing supply voltage, phases, frequency, full-load current, service short-circuit current rating (SCCR), and electrical diagram numbers.

SLIDE 4 (WRAP-UP)

💡 Apprentice Pro-Tip: Always check the MDC nameplate before pulling feeders to a containerized data center. The marked full-load current dictates your minimum conductor ampacity, and the SCCR tells you if the enclosure can handle the available fault current!

💬 Save this post for your next containerized data center hookup! 🔗 

More code breakdowns and study tools at www.JoshTheSparky.com

← View Chapter 6 Home

← Back To Article 626 Home

← Back To Quick Hits Home