Salar Saeedi

I started this project thinking I was building a “simple” low-voltage control and distribution panel for my workshop expansion.

By the end, I had a much better panel, a lighter wallet, two burned weekends, one failed inspection-style review, and a deep respect for standards.

This is my real-world DIY journey, step by step, from sketching the enclosure to understanding why standards and compliance are not just paperwork. They directly affect safety, testing, wiring layout, labeling, and whether your panel is actually usable in the real world.

A quick note before I begin: I am sharing this as a project story and learning guide, not as a substitute for local code requirements, certified design review, or licensed electrical work. For anything that touches mains power, short-circuit ratings, or legal installation, I now always involve a qualified electrician or panel professional.

A few years ago, I decided to rebuild the power distribution inside my small workshop panel after adding a bigger air compressor, a drill press, and a compact CNC machine. At first, I planned to wire everything with oversized cables and call it done.

That plan lasted until I opened an old industrial control cabinet and saw how cleanly the power was distributed with busbars.

That moment changed how I looked at electrical panels.

In this article, I will share my real DIY learning journey with busbars: what they are, why they exist, how they work, what types I compared, how I sized and installed them, how I inspected them, and the mistakes I made along the way. I will also cover related terms like bus coupler, bus duct, and busbar trunking system, because I got confused by all of those at the beginning too.

A quick safety note before we start: I only do limited low-voltage panel work within my competence, and I consult licensed electricians/engineers when needed. If you are dealing with mains distribution, high fault levels, or high-voltage equipment, do not treat this as a substitute for professional design or code compliance.

I’ve done a lot of DIY over the years—paint, framing, plumbing repairs—but nothing has demanded more humility (and more respect) than working around electrical panels. Not because it’s “mysterious,” but because it’s unforgiving. One wrong assumption—one “it probably fits”—can turn into heat, arcing, damaged bus stabs, or worse.

This blog is my hands-on, real-life project to clean up and expand a home load center, figure out what breakers are compatible with GE, decode GE breaker IDs, and navigate through the rabbit hole of compatibility vs interchangeability. Along the way: a few small wins, a couple expensive mistakes, and one moment where I stopped and called a pro—because safety isn’t optional.

Safety note (serious): I’m sharing a realistic DIY journey and decision process—not encouraging unqualified panel work. If you’re not trained, don’t remove the dead-front or modify service equipment. In many places, adding a main breaker or changing service equipment requires permits and a licensed electrician.

I used to think “electrical fires” were mostly about overloaded circuits. Then I opened up a couple of old receptacles during a remodel and noticed: slightly loose terminals, darkened insulation, and that faint “hot plastic”. That was my turning point. I decided to learn arc-fault protection (AFCI) properly, and upgrade the circuits I was touching so the safety matched the new finishes.

Quick safety notes before we start: working inside a panel can kill you. I did most of this as a DIYer, but I still pulled permits where required, followed lockout practices, and had a licensed electrician verify the final work and torque settings. If you’re not fully confident, hire it out. Your future self will thank you.