Quick Hits

Episode 4: Bonding, Intersystem Terminations & GFCIs (545.26 – 545.28)

SLIDE 1 (HOOK / COVER)

⚡ NEC Quick Hit: Relocatable Bonding & GFCIs (Part 4) ⚡

Chassis bonding rules, shared communication terminations, and outdoor compartment GFCI requirements—let's finish Article 545! 👇

SLIDE 2 (CHASSIS BONDING & INTERSYSTEM TERMINATIONS)

Equalizing Potential Across Sections:

• Bonding Exposed Metal: All exposed non-current-carrying metal parts likely to become energized must be bonded to the panelboard grounding terminal/enclosure, with a bonding conductor connected to an accessible terminal on the chassis.

• Connecting Multiple Sections: Chassis of multiple relocatable sections physically connected together must be bonded with a solid copper 8 AWG minimum conductor.

• Intersystem Bonding: Connected units can share a single communication system bonding termination (connected via a minimum 6 AWG copper conductor to each chassis bonding conductor).

SLIDE 3 (OUTDOOR GFCIs)

Compartment Safety:

• Outdoor Compartments: In addition to standard Article 210.8 rules, all receptacle outlets installed in compartments accessible from outside the relocatable structure must have GFCI protection for personnel.

SLIDE 4 (WRAP-UP)

💡 Apprentice Pro-Tip: Ensuring continuous chassis bonding and reliable grounding across joined modular trailer sections is critical for eliminating hazardous touch potentials!

💬 Save this post for your final code review on Manufactured Buildings and Relocatable Structures!

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