Enclosures don’t usually get the spotlight. It’s like they’re just… there. Doing their job;
until they’re not—and suddenly you’re dealing with corrosion, overheating, failed components, or a compliance headache you didn’t budget for.
We’ve seen it happen more times than we can count. The controls are solid. The components are right. But the enclosure choice? That’s where things go sideways.
Here are five most common enclosure mistakes we see in the field—and how to avoid learning these lessons the hard way.
Mistake #1: Treating the Enclosure Like an Afterthought
The panel design is done, the components are picked, and someone says, “Just grab a box big enough to fit it all.”
That’s how cramped panels, impossible wiring, and miserable maintenance are born.
An enclosure isn’t just a container—it’s the working environment for every component inside it. Too small and heat builds up and wiring turns into a spaghetti bowl. Troubleshooting becomes an all-day event.
How to avoid it:
Start with the enclosure early. Plan space for wiring, airflow, future expansion, and human hands that will eventually need to work inside it. Oversizing slightly now is far cheaper than rebuilding later.
Mistake #2: Choosing the Wrong Rating for the Environment
On paper, the enclosure looked fine. In the environment? Not so much.
Dust, moisture, washdowns, chemicals, outdoor temperature swings—these things don’t care what your spec sheet meant to say. A clean, climate-controlled enclosure dropped into a harsh environment won’t survive long.
We’ve seen standard enclosures rust, leak, and fail simply because the environment was underestimated.
How to avoid it:
Be honest about where the enclosure will live. Indoor or outdoor? Washdown or dusty? Temperature extremes? This is where proper NEMA or IP ratings matter—and pretending they don’t always lead to expensive surprises.
Mistake #3: Ignoring Heat (Until It’s Too Late)
Electronics hate heat. They hate it quietly, at first—then all at once.
Drives, power supplies, and PLCs into a sealed enclosure without a thermal plan is a classic mistake. Everything works great… until summer hits, production ramps up, or a filter clogs.
Sudden faults, shortened component life, and unexplained shutdowns usually trace back to heat that had nowhere to go.
How to avoid it:
Account for heat load from the beginning. That might mean filtered fans, air conditioners, heat exchangers, or simply giving components more breathing room. Managing temperature upfront protects every investment inside the enclosure.
Mistake #4: Forgetting the Human Who Has to Service It
An enclosure can be electrically perfect and still be a nightmare.
Poor door swing, no lighting, components mounted too high, too low, or too tight and there’s no room to get a meter in without scraping knuckles.
Maintenance teams remember these panels—and not fondly.
How to avoid it:
Design for the person opening the door at 2 a.m. Add internal lighting, leave service loops and make labels readable. Choose layouts that make sense to someone who didn’t design the panel. A service-friendly enclosure saves time, frustration, and downtime.
Mistake #5: Buying for Today and Forgetting About Tomorrow
The system works now. But what happens when production increases? A new sensor gets added? Communication upgrades become necessary?
Enclosures that are built with zero margin leave no room for growth—and force costly redesigns later.
How to avoid it:
Think long-term and leave space. Choose enclosures and accessories that allow for expansion. Planning for “future you” is one of the smartest design decisions you can make.
The right enclosure makes everything else better, it’s not flashy— it’s foundational.
If you’re planning a new panel or fixing one that’s already causing headaches, let’s talk. We’re here to help you avoid the mistakes—and build an enclosure that does its job quietly, reliably, and for a long time.
Because the best enclosures? You only notice them when they don’t cause problems.