Rittal NEMA 4X Enclosure vs. RAL 7035: A Practical Buying Guide (Plus: What Is Networks?)

There Is No 'One Rittal Enclosure'

I'm an office administrator at a 120-person manufacturing company, and I handle a lot of the supply ordering. Maybe 60 enclosure orders a year—or rather, closer to 50, I'd have to check the system. Ballpark $300K a year across eight vendors. When someone says 'we need a Rittal enclosure,' I'm the one who turns that into a part number. I'm not an engineer. I've just ordered enough of these to know what to ask before buying.

Here's the thing: there's no single 'best' Rittal enclosure. The right answer depends on where it goes and what's inside it. Searching for a Rittal NEMA 4X enclosure gives you one set of options. Searching for Rittal RAL 7035 gives you another. And if you don't know the difference, you're not alone. I didn't either when I started. I usually double-check part numbers against Rittal Corp's website before ordering, because the model numbering isn't exactly intuitive.

If you found this because you googled 'what is networks,' let's get that out of the way first. A network is just a group of devices connected so they can share data. In an office, that's computers, printers, a router, a switch, maybe a server. In a factory, those same kinds of devices often sit in an enclosure. If the enclosure is the wrong one, the network may still run—just not for long.

Sort Your Situation First

Before you order, put the project into one of three buckets: dry indoor, wet or dusty industrial, or coastal/chemical exposure. The questions I ask are actually simple: Where is the enclosure going? Will it ever get hosed down or sprayed with chemicals? Can you taste salt in the air?

That's the whole logic. No magic formula.

Scenario 1: Dry Indoor Network Closet (RAL 7035 Is Usually Enough)

If the enclosure sits in an air-conditioned office closet or a clean part of a plant, a standard Rittal enclosure in RAL 7035 is often the sensible choice. RAL 7035 is the light gray powder-coat finish you see on most industrial panels. It's not a rating. But for a dry environment, it looks professional and it holds up fine.

For a small network setup, I'd get a Rittal wall-mount enclosure with 19-inch rails, a fan/filter kit, and a plain door. Put a switch, patch panel, and router in it. If you want to see the status LEDs without opening the door, add a window—but keep in mind windows add cost and don't help with heat. I'd skip it unless your team actually uses it.

Honestly, I'm not sure why the industry settled on RAL 7035 as the default gray. My best guess is it hides dust better than pure white and doesn't show scuffs as much as darker colors. Whatever the reason, it's what you'll see on most Rittal indoor cabinets.

One honest caveat: for a truly dry indoor room, a NEMA 4X enclosure is overkill. People overshoot because 'industrial' sounds like it requires armored everything. It doesn't. A standard Rittal RAL 7035 enclosure will likely outlast the equipment inside it. Bottom line: if it's dry, don't pay for stainless.

Scenario 2: Washdown, Dust, or High Humidity (Go With a Rittal NEMA 4X Enclosure)

Now we get to the place where I made my classic rookie mistake. In my first year of buying, I assumed 'water resistant' meant the same thing as NEMA 4X. It doesn't. A regular enclosure might keep out some dripping water, but if you're in a food plant, washdown area, or anywhere that gets hosed down, you need a real Rittal NEMA 4X enclosure.

Per NEMA 250-2021, a NEMA 4X enclosure is designed for indoor or outdoor use and provides protection against windblown dust and rain, splashing and hose-directed water, and corrosion. The 'X' matters because it means corrosion-resistant. If you're in a washdown area, I'd go with stainless steel rather than painted mild steel, even if the paint is RAL 7035. Paint can chip at the edges, and that's where rust starts.

One thing I wish someone had told me: a sealed NEMA 4X enclosure has no airflow. If the device inside generates heat, you need a cooling solution. A PoE network switch can get surprisingly warm. I once ordered a sealed cabinet for a small network device because I thought 'sealed = protected.' That switch rebooting at 2 a.m. proved me wrong. Rittal makes climate control units for these cabinets, but that's a separate part and a separate conversation. If the device inside is a simple sensor or actuator, fine. If it's generating heat, plan for it.

Scenario 3: Coastal or Chemical Environments (Go Stainless, Ideally 316L)

Salt air is a different animal. A powder-coated RAL 7035 enclosure near the ocean will look fine at first. Then it won't. I still kick myself for not pushing back on a coastal project years ago. We used painted cabinets to save money, and about eight months later the hinges started to corrode and the paint was lifting around the door seals. The cost of replacing them far outweighed the upfront savings.

For coastal spots or chemical exposure, buy a Rittal NEMA 4X enclosure in stainless steel. For heavy chlorine exposure or salt spray, I'd try to get 316L rather than 304. I want to say 304 is fine for most inland washdown applications, but don't quote me on that—check the material spec against the actual chemical. This is also the scenario where I tell people to look at the whole system, not just the box. If the enclosure sits in direct sun, it will absorb heat. Add a shade, choose a light color if the manufacturer offers it, or include an enclosure air conditioner.

Dodged a bullet recently when I double-checked a part number before hitting submit. I was one click away from ordering a NEMA 1 enclosure for a washdown area just because it was listed in 'gray.' That would have been embarrassing.

Wait, What Is 'Networks' Anyway?

If you're still thinking about that search phrase, here's the practical version. A network device doesn't care what color the enclosure is. It cares about heat, water, and physical damage. If the device is on a network in a factory, it's probably a switch, a router, a controller, or a small server. Every one of those devices has an operating temperature range and a tolerance for moisture. The box around it has to protect that device, not just look industrial.

So when someone asks me 'what is networks?' I answer: it's a bunch of devices talking to each other. And the enclosure is what keeps them talking—by keeping rain, dust, and curious hands away.

How to Tell Which Scenario You're In

Here's the shortcut I use when a request lands on my desk.

• If the enclosure is going to a dry, climate-controlled room and nothing will ever be sprayed with a hose: standard Rittal RAL 7035 enclosure. Done.
• If the area gets washed down, is dusty, or has high humidity: Rittal NEMA 4X enclosure, stainless steel if you can justify it.
• If it's near salt water or a chemical process area: Rittal NEMA 4X in 316L, and make sure whoever installs it uses the right gland plates and seals.
• If the spec already says 'NEMA 4X' and someone is offering you a RAL 7035 cabinet, that's a red flag. Ask for the datasheet.

Also, check whether the panel needs to be UL 508A listed. If it does, the enclosure itself is part of a larger assembly. You'll likely have it built by a panel shop, not bought off the shelf and wired by whoever's around. That changes the conversation—you'll give the panel builder the Rittal part number and let them handle the listing.

Bottom Line

No single Rittal enclosure works for every job. For dry indoor network equipment, a Rittal RAL 7035 enclosure is usually the cost-effective, no-drama answer. For wet, dusty, salty, or chemical-heavy environments, a Rittal NEMA 4X enclosure in stainless steel is the safer call.

And if you're ever on the fence, ask the person who has to work on it. I've learned more from watching maintenance fight with a bad enclosure than from any brochure.