Quick Hits

Episode 4: Equipment Markings, Threading & Special Bonding (500.8 – 500.30)

SLIDE 1 (HOOK / COVER)

⚡ NEC Quick Hit: Equipment Markings, Threading & Bonding (Part 4) ⚡

Why do NPT threaded entries require at least five full threads engaged? How do you properly bond raceways in classified areas? Let's finish Article 500! 👇

SLIDE 2 (EQUIPMENT MARKINGS & TEMPERATURE RATINGS)

Required Nameplate Details:

• Equipment nameplates must specify the Class, Division, Material Group, Temperature Class (T-code), and ambient temperature range.

• Equipment identified for Division 1 is also permitted and suitable for Division 2 locations of the same class, group, and temperature class.

SLIDE 3 (THREADING & FIVE FULL THREADS)

Securing Explosionproof Integrity:

• NPT-threaded entries into explosionproof equipment must be made up with at least five threads fully engaged (four and one-half for listed factory-threaded entries).

• All unused openings must be securely closed with listed blanking elements or close-up plugs.

SLIDE 4 (WRAP-UP)

💡 Apprentice Pro-Tip: All conduit joints in hazardous locations must be made wrenchtight to ensure a reliable ground-fault current path and prevent arcing. Bonding jumpers are not a permitted substitute for tight threaded joints!

💬 Save this post for your final code review on Article 500!

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

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