Quick Hits

Article 384 (Part 1 of 2)
Strut-Type Channel Raceway — Full Article Breakdown!

SLIDE 1 — Scope, Listing & Reconditioned Equipment (384.1, 384.2, 384.3)
🏗️ WHAT IS A STRUT-TYPE CHANNEL RACEWAY?
Covers use, installation, and construction specs for strut-type channel raceway and its accessories.
✅ Must be LISTED and identified for the use (384.2).
🚫 Reconditioned strut-type channel raceways AND reconditioned accessories are NOT permitted to be installed (384.3(B)).

SLIDE 2 — Uses Permitted (384.10)
✅ WHERE YOU CAN USE THEM
1️⃣ Exposed
2️⃣ Dry locations
3️⃣ Corrosive vapor locations — if protected by finishes approved for the condition
4️⃣ As power poles
5️⃣ Hazardous (classified) locations — as permitted in Chapter 5
6️⃣ Extensions of unbroken length through walls/partitions/floors — if closure strips are removable from either side and the in-wall/floor portion stays covered
7️⃣ Ferrous raceways/fittings protected ONLY by enamel — indoors only

SLIDE 3 — Uses Not Permitted (384.12)
⛔ WHERE YOU CAN'T USE THEM
1️⃣ Concealed — period.
2️⃣ Ferrous raceways/fittings protected ONLY by enamel — NOT permitted where subject to severe corrosive influences

SLIDE 4 — Conductors: Size & Fill (384.21, 384.22) + Final Exam
📏 SIZE LIMIT (384.21)
No conductor larger than what the raceway is listed for.
📊 FILL (384.22)
🔹 Percentage fill per Table 384.22, using the Chapter 9 tables for conductor cross-sectional area
🔹 Raceways with EXTERNAL joiners → 40% fill calc
🔹 Raceways with INTERNAL joiners → 25% fill calc
🔹 310.15(C)(1) adjustment factors do NOT apply IF ALL THREE are true: raceway cross-section > 2500mm² (4 in.²), current-carrying conductors ≤ 30, AND total conductor area ≤ 20% of interior cross-section

🧠 FINAL EXAM QUESTION FOR ARTICLE 384 (Part 1)
Q: Per Table 384.22, a strut-type channel raceway using INTERNAL joiners must use what percentage fill calculation?
A) 20%
B) 25%
C) 40%
D) 75%
(Drop your final answer 👇)

Article 384 Part 1 = DONE ✅ Part 2 drops next — support, splices, grounding & construction specs! ⚡ #JoshTheSparky #NEC2026 #ElectricianLife

← View Chapter 3 Home

← Back To Article 384 Home

← Back To Quick Hits Home