Quick Hits

Episode 4: Ground-Fault Protection for Personnel & OCPDs (590.7 – 590.9)

SLIDE 1 (HOOK / COVER)

⚡ NEC Quick Hit: Personnel GFCI & OCPD Safety (Part 4) ⚡

Construction site GFCI mandates, portable generator rules, and current-limiting services—let's finish Article 590! 👇

SLIDE 2 (GROUND-FAULT PROTECTION FOR PERSONNEL)

Stopping Jobsite Shocks:

• Receptacle Mandates: All 125V, single-phase, 15-, 20-, and 30-ampere temporary receptacle outlets (whether permanent wiring used temporarily, temporary site wiring, or on 15kW/smaller portable generators) require GFCI protection for personnel.

• Industrial Exception: Industrial establishments with qualified supervision may use an Assured Equipment Grounding Conductor Program (AEGCP) instead of GFCIs only where GFCI protection causes a greater hazard (like ventilation fans) or is incompatible.

• AEGCP Testing: If an AEGCP is used elsewhere, continuous written testing for ground wire continuity and correct polarity is required at intervals not exceeding 3 months.

SLIDE 3 (REUSED OCPDS & CURRENT LIMITING)

Equipment Integrity:

• Reused OCPDs: Previously used overcurrent protective devices installed in temporary setups must be examined to ensure proper maintenance and no evidence of failure.

• Current Limiting Services: Service OCPDs for solidly grounded wye systems over 150V to ground (up to 1000V) with available fault currents exceeding 10,000 amperes must be current limiting to reduce incident energy.

SLIDE 4 (WRAP-UP)

💡 Apprentice Pro-Tip: Never bypass construction site GFCIs because of "nuisance tripping"—they are lifesaving devices catching real ground faults and insulation breakdowns in portable tools!

💬 Save this post for your final code review on Temporary Installations!

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

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