Quick Hits

⚡ NEC Quick Hit: Electroplating Equipment (Article 669) ⚡ 

Extremely high currents, ultra-low voltages, and bare copper busbars running right through the shop—welcome to Article 669! How does the Code govern wiring for electroplating, anodizing, and electropolishing? Let's break down the rules! 👇

SLIDE 2 (WIRING METHODS & BARE CONDUCTORS) Running High-Current Busbars:

• Under 60V DC: Insulated or bare copper/aluminum conductors are permitted to be run without enclosed raceways, provided they are supported on insulators and protected from physical damage.

• Over 60V DC: Where systems exceed 60V DC (common in aluminum anodizing), bare conductors supported on insulators must be guarded against accidental contact per Section 110.27!

SLIDE 3 (WARNING SIGNS, DISCONNECTS & OCPD) Safety, Disconnects & Protection:

• Mandatory Warning Signs: Must be posted to indicate the presence of bare conductors (compliant with Section 110.21(B)).

• Multiple Power Supplies: Where more than one power supply serves the same DC system, a disconnect (or removable link/conductor) is required on the DC side of each supply.

• DC Overcurrent Protection: Provided via fuses, circuit breakers, or approved current-sensing disconnect devices.

SLIDE 4 (WRAP-UP) 💡 Apprentice Pro-Tip: 

Branch-circuit conductors supplying electroplating units must have an ampacity of not less than 125 percent of the total connected load. Always verify your heavy-duty busbar ampacity ratings per Article 366!

💬 Save this post for your next industrial electroplating shop layout! 🔗 

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