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📱 EPISODE 2 — Article 368 (Part 2 of 3)

Support, Branches & Grounding

SLIDE 1 — Support and Dead Ends
🛠️ SUPPORT (368.30)

Securely supported at intervals not exceeding 5 ft (1.5m) — unless otherwise designed and marked.

🔚 DEAD ENDS (368.58): must be CLOSED — no open, exposed bus ends.

SLIDE 2 — Branches from Busways (368.56(A))
🔌 WIRING METHODS PERMITTED FOR BRANCHES

A long list of compatible wiring methods: AC cable, MC cable, MI cable, IMC, RMC, FMC, LFMC, PVC, RTRC, LFNC, EMT, ENT, busways themselves, strut-type channel raceway, surface metal raceway, surface nonmetallic raceway.

Where a separate EGC connects to the busway, it must comply with 250.8 and 250.12.

SLIDE 3 — Cord/Cable Branches
🔗 CORD AND CABLE ASSEMBLIES (368.56(B))

Permitted for portable OR stationary equipment (facilitating interchange) IF:
✅ Attached to the building by approved means
✅ Length from plug-in device to tension take-up support: max 6 ft (1.8m)
✅ Installed as a vertical riser from support device to equipment
✅ Strain relief cable grips at BOTH the busway plug-in AND equipment terminations

Exception (industrial only, qualified persons): lengths CAN exceed 6 ft if supported at intervals ≤8 ft (2.5m).

Trolley-type busways (368.56(C)): suitable cord/cable assemblies permitted for movable equipment connections per 400.10/400.12.

SLIDE 4 — Grounding + Exam Question
🌎 GROUNDING (368.60)

Busway connects to an EGC, equipment bonding jumper, OR grounded conductor per 250.92(B)(1) or 250.142.

🏷️ MARKING (368.120): voltage/current rating + manufacturer name/trademark, visible after installation.

🧠 TEST YOURSELF

Q: Per 368.56(B)(2), what is the maximum length permitted from a busway plug-in device to a tension take-up support device, under general (non-industrial) conditions?

A) 3 ft
B) 6 ft
C) 8 ft
D) 10 ft

(Drop your answer 👇)

FOLLOW — Part 3 wraps up the over-1000V requirements (Part IV) ⚡ #JoshTheSparky #NEC2026 #ElectricianLife

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