Whether you are ordering one enclosure for a prototype or sourcing cases for a larger production run, it helps to know what information to check before placing your order. Below are some of the most common questions customers ask before ordering enclosures.

How do I know what size enclosure I need?

To determine the correct enclosure size, measure the height, width, and depth of your internal components. Compare these measurements against the internal dimensions on the enclosure's drawing. Polycase provides STEP, DWG, and PDF drawings on the product pages to make finding the right enclosure easy.

How do I search for an enclosure by size?

To find an electronics enclosure by dimensions, use an online enclosure sizing tool to input your required length, width, and height. Since physical shapes and component thicknesses vary, you should always cross-reference your needed dimensions with the product's official engineering drawings rather than relying solely on approximate external sizing. Polycase has a Shop By Size tool to enter your required internal or external dimensions along with advanced filters to instantly narrow your results by material type, application environment, color, and more. Our customer service team can also assist.

What if a manufacturer doesn't make an exact enclosure that matches my required dimensions?

If an exact size isn't available, the closest stock enclosure is the fastest and most cost-effective solution. Fully custom molded enclosures require new tooling, making them expensive and a service most manufacturers don't offer.

What enclosure should I use for outdoor locations?

For outdoor, wet, or heavy washdown environments, outdoor electrical boxes often require a NEMA 4X or NEMA 6/6P rating to ensure water and corrosion protection. Polycase has more than 300 certified waterproof electrical boxes engineered to meet these standards.

EXPLORE NEMA ENCLOSURES

Durable American-Made Outdoor Waterproof Enclosures:

  • ZH Series: Heavy-duty junction boxes, rated up to NEMA 6P weatherproof polycarbonate enclosures equipped with a continuous neoprene gasket, designed to withstand demanding industrial and outdoor applications.
  • ML SERIES: Impact-resistant, UV-stabilized polycarbonate electrical enclosures featuring a clean, modern design that is ideal for outdoor controls and small electronic assemblies.
  • HP SERIES: Available in black or gray durable polycarbonate, providing excellent NEMA 4X protection against moisture and debris.
  • HN SERIES: This brand-new series features advanced environmental protection with both IP68 and NEMA 6P ratings.

If your project has a specific rating requirement, make sure the enclosure you choose meets that rating. If you are unsure, contact us with the environment details so our team can help you find the right nema enclosure to fit your needs.

"Excellent product, well-built with integrity and pride, and it reflects in the finished product. Solid, strong construction with the base and cover mating perfectly, and no sharp edges to cut you during installation or after-install use. This is a product of value that will withstand the test of time and will keep your installation safe from the outside environment wherever you are." — John S.

Where can I find NEMA-rated enclosures?

Polycase manufactures a comprehensive selection of UL-listed, high-quality NEMA-rated enclosures built for harsh environments. These ratings are often required in the irrigation, industrial controls, HVAC, and marine industries.
"My go to NEMA boxes. I have deployed hundreds of these across our company. Polycase is always quick to ship and a price that cannot be beat. Superior protection from the elements, and different mounting and closing options to meet our needs." — Jason B.

Where can I buy IP-rated enclosures?

Polycase offers UL-listed IP-rated enclosures. An IP rating describes protection against solid ingress like dust and liquids like water.

If your application requires a specific IP rating (such as IP65, IP66, IP67, or IP68), check the product page for the enclosure you are considering.

Are there enclosures made for DIN rails?

Yes, there are many enclosure styles manufactured for the use of DIN rails. When choosing a DIN rail enclosure, always consider the physical dimensions of your internal electronics and wire entry pathways.

SHOP DIN RAIL ENCLOSURES

We offer a large selection of DIN rail enclosure options including:

  • EK Series: Plastic enclosures designed with a mounting clip that snaps directly to DIN-35 rail
Top series designed with PCB mounting bosses designed to simplify DIN rail installations:
  • HN Series: Rugged screw-down enclosures available in gray or black with multiple mounting options for demanding applications.
  • HP Series: High-performance impact-resistant outdoor enclosures featuring a hinged cover for convenient access during installation and maintenance.
  • SK Series: Fiberglass-reinforced polycarbonate enclosures with metric knockouts for industrial and electrical applications.
  • ZH Series: Heavy-duty polycarbonate enclosures rated up to NEMA 6P, available with clear or opaque covers.

Can I get an enclosure with a clear cover?

Many enclosures are available with clear cover options, allowing you to view displays, LEDs, status indicators, labels, or internal components without opening the enclosure. We have multiple enclosures with the option of a clear cover, with pricing found right online.

"The clear [cover] part is crystal clear with no damage." — Kento B.

Where can I get cutouts and graphics added to an enclosure?

Polycase offers customization services for the majority of our enclosures. Customization includes precision CNC machining for cutouts and advanced graphics for full-color digital printing and laser marking. CNC machining is ideal for cable entries, buttons, display screens, specialized hole types (threaded, counterbore, etc.). Digital printing is ideal for infographics, component identification, and custom artwork/branding.

You can quote customization to a stock enclosure online using our instant quote tool. It takes under 90 seconds and you just need to know:

  • How many sides/surfaces require customization.
  • How many unique features or print colors your project requires.
"I added 5 custom holes that needed to be drilled out on the south face of my enclosure. They were crisp, and clean. Same quality as my previous orders, which have always been perfect!" — Tyler G."

How do I get a quote for stock enclosures?

While many manufacturers require you to reach out for a quote, we believe in full pricing transparency by providing pricing right on the product page. All pricing, including quantity price breaks, is available on the product page alongside current inventory, engineering drawings, ratings, and additional specifications.

How do I check inventory for enclosures before ordering?

Polycase shows inventory levels on the website. Search the part number to see all stock availability listed in the inventory tab. Most standard enclosures are manufactured in our Avon, Ohio factory and can ship the same business day when ordered before 3 PM EST. If an enclosure is out of stock, contact us to review your options. For the few items not manufactured directly by Polycase, the inventory tab will show high-quality American-made alternatives. Our team will reach out within 1 business day (often within a few hours) to inform you of any delays after an order is placed.

"The case I ordered was out of stock and I did not notice until the email confirmation showed the delivery date was past the date I needed the item. I emailed customer service asking if a different item could be substituted. Within a few hours the substitute case was on my order and confirmed by email. Huge thank you to Brandon B and the team at Polycase." — Steve K.

Are all of Polycase's products manufactured in the United States?

No, not all enclosures are American made, but the vast majority of our products are made in Ohio. Our best-selling American-made series include:

  • LP Series: Indoor plastic boxes often used for aviation, agriculture, alternative energy, and building controls.
  • FB Series: Compact, durable enclosures specifically designed for commercial key fobs and remote control sensing applications.
  • HD Series: Heavy-duty industrial enclosures great for medical devices, heavy equipment, and robotics.
  • HP Series: High-performance, impact-resistant outdoor enclosures built for remote monitoring, transportation, and biopharma controls.

Can I return or exchange a Polycase enclosure?

Most stock items are eligible for return. Contact a customer service representative to obtain an RMA number before returning any product. You will need to provide the reason for the return, the order number, and the total quantity of parts being returned.

"Customer service is top-notch. I had to return and reorder a part and the new part showed up the next day. Crazy fast and unexpected. This place is awesome." — Billy R.

Where can I find enclosure drawings, datasheets, and specifications?

We provide enclosure drawings directly on the product page in the "Downloads" tab.

Customers often need this technical data to confirm structural fit, plan external mounting, review material flammability, check industrial ratings, or share engineering details with procurement teams.

"...I can't help but to applaud the amazing detailed pictures for every product you guys have on your website, keep up the good work, truly amazing pictures and products." — Miles P.

Can I get shipping costs before placing an order?

You can view your exact shipping costs in the cart before checking out by entering your address.

"The fastest shipping in the world!" — Amanda D.

Does Polycase have international distributors?

We work directly with our customers and do not have any official distributors. We ship anywhere in the world and consistently negotiate international shipping costs to pass our freight discounts specific to their products directly to our customers.

Final thoughts before ordering

Before placing an enclosure order, it is worth taking a few minutes to confirm the size, rating, material, cover style, and any customization needs. A little extra review upfront can help prevent sizing issues, delays, returns, and order changes later.

If you are not sure which enclosure is the right fit, Polycase is happy to assist. We are open Monday-Friday 8:00 AM - 5:00 PM EST, where our team in Avon, Ohio will always answer the phone, chats, and emails, never a bot or automated system.

Written by Polycase