Quick Hits

Episode 3: Lamp Protection, Splices & Support Rules (590.6(D) – 590.6(I))

SLIDE 1 (HOOK / COVER)

⚡ NEC Quick Hit: Temporary Splices & Supports (Part 3) ⚡

Construction site splice exceptions, lamp guards, and tree support rules—let's review Sections 590.6(D) through (I)! 👇

SLIDE 2 (LAMP GUARDS & CONSTRUCTION SPLICES)

Guards and Box Rules:

• Lamp Protection: All lamps for general illumination must be protected from accidental contact or breakage by a guard (metal guards must be grounded).

• Splice Enclosures: Splices normally require a box with a cover, but construction sites permit splicing multiconductor cords without a box provided equipment grounding continuity is maintained.

• Disconnecting Means: Suitable switches or plug connectors must disconnect all ungrounded conductors simultaneously, using identified handle ties for multiwire branch circuits.

SLIDE 3 (SUPPORT & PROTECTION FROM DAMAGE)

Hanging and Routing Rules:

• Elevated Cords: Cable assemblies and flexible cords serving as branch circuits or feeders shall not be installed on the floor or ground (extension cords are exempt from this support rule).

• No Vegetation Support: Vegetation must not be used to support overhead spans of branch circuits or feeders.

• Holiday Exception: Trees may support holiday lighting for up to 90 days if proper strain relief and tension take-up devices protect conductors from tree sway.

SLIDE 4 (WRAP-UP)

💡 Apprentice Pro-Tip: While extension cords can cross floors if protected from physical damage, temporary branch circuits and feeder cables must be elevated and securely supported off the ground!

💬 Save this post for your next jobsite safety walkthrough!

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