Quick Hits

Episode 3: Grounding, Bonding & Weatherproofing (600.7 – 600.9)

SLIDE 1 (HOOK / COVER) ⚡ NEC Quick Hit: Sign Grounding & Wet Locations (Part 3 - Article 600) ⚡ 

Metal sign bodies, flexible conduit bonding limits, and outdoor drainage holes—Part I of Article 600 keeps outdoor signs electrically safe. Let's check out the rules! 👇

SLIDE 2 (EQUIPMENT GROUNDING & BONDING)

Tying Metal Parts Together:

• EGC Connection: Metal parts of signs and outline lighting must connect to the branch circuit equipment grounding conductor.

• FMC Bonding Limit: Listed Flexible Metal Conduit (FMC) or Liquidtight FMC enclosing secondary neon wiring is permitted as a bonding means if the total accumulated length does not exceed 30 m (100 ft).

SLIDE 3 (LOCATION & WET LOCATION DRAINAGE)

Surviving the Elements:

• Vehicle Clearance: Sign equipment must be at least 4.3 m (14 ft) above areas accessible to vehicles unless protected from physical damage.

• Drain Holes: Outdoor weatherproof signs must include drain holes between 6 mm (¼ in.) and 13 mm (½ in.) positioned at every low point to prevent moisture accumulation.

SLIDE 4 (WRAP-UP)

💡 Apprentice Pro-Tip: 

Portable or mobile electric signs used in wet locations must come equipped with a factory-installed GFCI featuring integral open-neutral protection built right into the attachment plug or cord!

💬 Save this post for your next exterior sign rough-in! 🔗 

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