📱 EPISODE 3 — The Annexxed Information Series (Part 3 of 3)

Torque Tables, Medical Equipment & the 2029 NEC Preview

SLIDE 1 — Annex I: Tightening Torque Tables
 

🔧 THE TORQUE WRENCH'S BEST FRIEND

Annex I (from UL 486A-486B) gives RECOMMENDED torque values for screw-type connections when the manufacturer doesn't specify their own:
 

🔹 Table I.1 — slotted head screws No. 10 and larger, by conductor size and connector type (split-bolt vs. other)
 

🔹 Table I.2 — smaller slotted screws (for 8 AWG or smaller conductors)
 

🔹 Table I.3 — recessed Allen/square drive screws, by socket size

⚠️ Critical reminder: checking torque AFTER installation isn't reliable — some relaxation naturally occurs in service. Get it right the first time.

SLIDE 2 — Annex K: Medical Electrical Equipment in Dwellings
 

🏥 A GROWING CONCERN — HOME HEALTHCARE

Added during the 2023 NEC cycle, Annex K addresses the rise of Medical Electrical Equipment (MEE) used in homes and residential board-and-care occupancies.

Key concepts:
 

🔹 Class I MEE — relies on EGC bonding as protection against shock; must be permanently installed

🔹 Class II MEE — relies on double/reinforced insulation instead; no bonding provisions
 

🔹 Life support equipment — the highest-stakes category. Recommendations include: individual branch circuit where feasible, limiting MEE loads to 50% or less per 210.23(B)(2), backup power analysis, and audible alarms for power loss
 

🔹 Required labeling on shared-circuit receptacles: "WARNING — Power loss risk to life-support and medical equipment on same circuit. DO NOT OVERLOAD"
 

🔹 Wet/damp location use requires an IP rating (IPX1 minimum) on the equipment — "Keep Dry" umbrella symbol means dry locations ONLY

SLIDE 3 — Annex L: The 2029 NEC Reorganization Preview
 

🔮 A GLIMPSE INTO THE FUTURE OF THE CODE

Annex L shows the PROPOSED organization for the 2029 NEC — approved for public review by the NEC Correlating Committee. This is a massive restructuring effort that's been underway since the 2023 cycle.

Highlights of what's changing:
 

🔹 Chapters get renumbered — e.g., Chapter 2 becomes "Wiring and Protection for Systems 1000V AC, 1500V DC and Below"
 

🔹 Article 220 (Load Calculations) becomes Article 120
🔹 A NEW Chapter 3 splits out everything over 1000V/1500V into its own dedicated chapter
 

🔹 A NEW Chapter 4 consolidates ALL limited-energy systems (Class 2/3, fire alarm, communications) together

 🔹 Circular raceways (conduit/tubing) get grouped into a new Chapter 8; noncircular raceways into Chapter 9
 

🔹 Even "Chapter 9 Tables" becomes "Chapter 30 Tables" in the new numbering

📌 This is a LONG-TERM roadmap — but if you're building study habits now, it's worth knowing the Code's structure is heading toward a major reorganization.

SLIDE 4 — Final Exam Question
 

🧠 FINAL EXAM QUESTION FOR THE ANNEXXED INFORMATION SERIES

Q: Per Informative Annex L, what does Article 220 (Load Calculations) become renumbered to in the proposed 2029 NEC?

A) Article 110
 

B) Article 120
 

C) Article 210
 

D) Article 300

(Drop your final answer 👇)

🎉 That's a wrap on the Informative Annexes — the reference backbone behind the entire National Electrical Code! From product standards (Annex A) to load calc examples (Annex D) to the mysterious optional Article 80 (Annex H) to a peek at 2029's reorganized future (Annex L) — this closes out our full NEC 2026 series.

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