Washington – NEC 2026 – Grounding and Bonding

Covers 2026 National Electrical Code changes to feeders, services, and grounding and bonding, beginning with multiple feeders and emergency disconnects in Article 225 and service requirements in Article 230, including service equipment listing, outdoor service disconnects for dwellings, surge protection for emergency responder sleeping quarters, meter sockets, and ground-fault protection for DC services. Participants then review Article 250 changes to performance requirements, separately derived systems, grounding electrode conductors and connections, intersystem bonding, and equipment grounding conductor identification.

The course then addresses medium voltage services in new Article 268, including listing, service-entrance conductor sets, and disconnect location. Later lessons cover new Article 270 for systems over 1000 VAC and 1500 VDC: general grounding requirements, objectionable current, substation fences, main and system bonding jumpers, transformers, separate buildings, portable generators and equipment, impedance grounded systems, grounding electrodes and electrode conductors, equipment grounding conductors, and bonding of piping and structural metal.

Learning objectives

• Identify changes to feeder and service requirements in Articles 225 and 230, including outdoor service disconnects, surge protection, and DC ground-fault protection.
• Apply revised Article 250 requirements for separately derived systems, grounding electrode conductors, intersystem bonding, and receptacle grounding.
• Locate requirements for medium voltage services in new Article 268.
• Determine grounding and bonding requirements for systems over 1000 VAC and 1500 VDC under new Article 270.

Disclosure of proprietary interest. No instructor, subject-matter expert or content author involved in developing or delivering this course holds any financial or ownership interest in any product, instrument, device or material referenced in it, and none receives any royalty, profit share or other consideration from the promotion or endorsement of any product. This course does not endorse any commercial product or service.