March 19, 2026
March 19, 2026
For years, medium-voltage work lived in an awkward middle ground within the National Electrical Code. It wasn’t low voltage, but it also wasn’t given the same clean, intuitive structure that electricians were used to for systems under 1,000 volts. Requirements were packed into broader articles, grounding rules were buried inside larger sections, and finding specific guidance often meant digging through pages that covered multiple system types at once.
The 2026 NEC changes that in a big way.
Rather than tweaking a few paragraphs here and there, the Code has taken a step back and reorganized medium-voltage requirements into a clearer, more parallel structure — one that mirrors how lower-voltage systems are already laid out. The result is a Code that’s easier to navigate and far more practical for electricians working on medium-voltage installations.
Let’s break down what changed — and why it matters.
In previous editions of the NEC, Article 235 covered branch circuits, feeders, and services over 1,000 volts AC and 1,500 volts DC. While it technically contained everything you needed, it lumped together multiple system components under one umbrella. That structure worked on paper, but in the field — or in the classroom — it often slowed people down.
Need a rule for medium-voltage feeders? You still had to sift through service requirements and branch-circuit language to find it. Teaching medium-voltage systems meant constantly bouncing around inside one large article rather than walking through a logical progression.
The 2026 NEC deletes Article 235 entirely — but the content hasn’t disappeared. Instead, it’s been reorganized into separate, purpose-driven articles:
This mirrors the structure electricians already know from lower-voltage installations. Each major system component has its own dedicated space, with requirements tailored specifically to that portion of the installation. From a practical standpoint, this is a huge improvement. If you’re working on a medium-voltage feeder, you go straight to Article 266. If you’re dealing with outside installations, Article 267 is now your home base. No more hunting through a combined article trying to separate which rules apply to which part of the system.
The Code is finally organized the way electricians actually think about electrical systems.
One of the long-standing frustrations with medium-voltage rules was that they didn’t “line up” with how lower-voltage systems were laid out in the NEC. For systems under 1,000 volts, electricians are used to distinct articles that separate branch circuits, feeders, services, and special conditions. That structure makes training easier, inspections clearer, and troubleshooting faster.
By reorganizing medium-voltage work into the same conceptual framework, the NEC has created consistency across voltage levels.
That consistency brings several real-world benefits:
In short, the Code now works with the way electricians already think — instead of forcing them to adapt to an awkward structure.
The reorganization didn’t stop with circuits, feeders, and services.
Another major improvement in the 2026 NEC is the creation of Article 270, which now exclusively covers grounding and bonding for medium-voltage systems.
Previously, medium-voltage grounding lived in Part X of Article 250 — mixed in with grounding rules for lower-voltage installations. While the information was there, it often felt buried. Electricians had to sort through large sections of Article 250 to determine what applied specifically to medium voltage.
Now, grounding and bonding for medium-voltage systems has its own dedicated article. Grounding medium-voltage systems involves different hazards, equipment considerations, and system behaviors than typical low-voltage installations. Giving it its own article recognizes those differences and provides a cleaner, more focused set of requirements.
Once again, the NEC is creating a parallel structure:
Medium-voltage systems now follow the same logical flow electricians are used to elsewhere in the Code.
From a day-to-day standpoint, these changes won’t necessarily alter how medium-voltage systems are installed — but they will dramatically improve how the Code is used.
Expect to see:
For instructors, this is especially valuable. Teaching medium-voltage systems can now follow the same structure students already understand from lower-voltage coursework. That reduces learning friction and helps new electricians build confidence faster.
For experienced electricians, it means less page-flipping and more time focused on the work itself.
These medium-voltage updates aren’t happening in isolation. They’re part of a broader effort within the 2026 NEC to make the Code more logical, organized, and user-friendly.
The NEC isn’t being restructured because it failed — it’s being restructured because it worked for over a century and now needs modernization to match today’s electrical world. Electrical systems are more complex, technology is evolving faster, and electricians need a Code that supports efficiency rather than slowing it down.
Yes, this reorganization will require some retraining. Old habits will have to change. Muscle memory for article numbers will need updating.
But the long-term payoff is clear:
Medium-voltage work, in particular, benefits enormously from this cleaner structure.
The 2026 NEC finally gives medium-voltage systems the organizational clarity they’ve needed for years.
By breaking up the old catch-all Article 235 into focused, system-specific articles and creating a dedicated grounding and bonding article with 270, the Code now treats medium voltage with the same logical structure used throughout lower-voltage installations.
For electricians who work in this space — and for those training the next generation — this is a meaningful improvement. It won’t feel natural on day one. But just like past NEC reorganizations, it will quickly become the new normal. And when medium-voltage rules are easier to find, easier to teach, and easier to apply correctly, the entire industry benefits.
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