Custom NEMA 4X Enclosure Manufacturer in China

KDM NEMA 4X Enclosure

Metal NEMA 4X enclosure

KDM NEMA 4X enclosure just like other enclosures, it has a very little difference, as it can be used both in indoors or in outdoor environments. If provide enough protection to the people from accessing the component as it poses hazardous effect into them. The electrical component is also protected from damage by the adverse environmental conditions such as ingress of solid objects, dust, water, and snow.

NEMA 4X enclosure from KDM has strong ability to provide protection to internal components against hose-directed water. This also provides an additional level of protection of other forms of corrosion that would pose a great threat to the equipment. And that will be undamaged by the external formation of ice on the enclosure.

KDM offer several types of NEMA 4X enclosure, including wall mount enclosure, floor mount enclosure, free standing enclosure, enclosure with viewing window, double door stainless steel enclosure, free standing industrial enclosure with file pocket, free standing modular enclosure with window, free standing enclosure with locks and latches, lockable enclosure with polycarbonate window and more.

The entire range of above-mentioned NEMA 4X products is developed using the latest technology that ensures optimum reliability. Our NEMA 4X enclosure is generally manufactured using metal and non-metallic materials, depending on the requirements of your application, you had the choice to make on the kind of material required. For the options, including pre-punched holes, insulation retainers, welded couplings and view windows, KDM will handle your orders.

KDM, as the premier manufacturer of NEMA enclosure in China, we have been a leading provider of NEMA 4X enclosures for decades. We are capable of meeting the demands of our clients as per their choice, preference, and requirements. Let us be your enclosure solution so that you will save labor, cut material costs and at the same time, increase productivity. We have 24-hour customer service, so feel free to contact us anytime!

The Definitive FAQ Guide to NEMA 4X Enclosures

What does NEMA Type 4X mean?

Type 4 enclosures protect personnel from accidental contact with live parts, as well as protect the equipment from windblown dust, rain, snow, ice, hose-directed water, and corrosion.

NEMA Type 4X enclosures have more PU gaskets, more welded parts, and more resistant materials, making them suitable for most harsh environments.

Typical NEMA 4X box

How is NEMA 4X different from NEMA 4?

NEMA 4X is the same as NEMA 4, except it offers extra protection against corrosive agents, such as alkaloids, acids, and highly polar solvents like acetone and MEK.

Usually, this is due to the materials used.

Are NEMA 4X enclosures used outdoors?

NEMA 4X enclosures are very often used outdoors, as well as indoors in industrial places.

Because of the type’s protection against water and corrosion, it is perfectly suitable for the outside.

What is the standard NEMA 4X enclosure configuration?

The standard configuration we provide is a gland plate with modules for cable entry, ground connections, fluorescent lamps with a switch, a radiating fan, PU gaskets.

NEMA 4X enclosures should also be marked if they require waterproof fittings, conduit connections, and mounting hubs.

You can also request any other feature you need.

What are the common applications for NEMA 4X enclosures?

NEMA 4X enclosures are used mainly for industrial applications. 

These include electrical hydraulic or pneumatic control box, terminal or junction wiring enclosures, operator interfaces, and consoles with corrosion-resistant properties.

NEMA 4X
Because of this type’s resistance to water, these enclosures are often found in marine or naval applications, transportation industries, and various municipalities like water treatment plants.

Furthermore, irrigation systems and process industries heavily rely on 4X enclosures.

Why?

Well, such industries work with various chemicals like fertilizers, minerals, petroleum, alkalines, etc.

Also, food processing factories, pharmaceutical factories, and even research institutions need corrosion-resistant enclosures to withstand frequent sanitization and leakage of chemicals.

For more information, check out our general NEMA エンクロージャに関する FAQ!

How are NEMA 4X enclosures tested?

You can refer to the latest NEMA 250 document for requirements of self-declaration of NEMAラベル.

NEMA 4X is tested using the external icing test, the hose down test, the outdoor corrosion test, the gasket test, and an additional 4X corrosion test.

External icing test involves spraying the enclosure with water and then cooling down the room until 20mm of ice has formed over the enclosure.

 External icing test
The enclosure should be undamaged and operable at the end of the test.

Outdoor corrosion test involves making a 5% sodium chloride solution and spraying it onto the enclosure continuously for 200 hours (8.3 days).

The hose down test sprays water at a rate of 246 liters per minute for as long as it takes to test all weak points like seams, joints, fittings, and other such places.

 Hosedown test
NEMA 4X enclosures also undergo various gasket tests to evaluate how they age while stretched at high temperatures.

As long as there are no cracks, deformations, and the tensile strength remains the same, the enclosure passes this test.

It is needed because good gaskets are key to good protection against water ingress.

Why does the 4X corrosion test require only 200 hours of testing instead of 600?

This is because the 4X corrosion test requires the enclosure to be compared with 304 steel, instead of galvanized steel, as is the case with outdoor corrosion test.

In other words, a different comparison standard calls for a different test duration.

  Corrosion test

How can I be sure of the quality of NEMA 4X enclosures?

KDMでは、 ISO9001認証 見ることができるもの。

また、品質と適合性評価の確認が必要な場合は、エンクロージャの独立したサードパーティテストを実施することもできます。

What is NEMA 4X in IP standards?

Although it is difficult to translate one set of standards into another, NEMA Type 4X is similar to IP55 and IP66.

  NEMAとIP 

ノックアウト、通気口、継手などはエンクロージャの定格に影響しますか?

Individual fittings, vents, knockouts, etc —ideally —should have a better NEMA rating than the enclosure itself.

However, this may not be possible, so these features should have the same rating as the overall structure.

If they have a lower rating, the rating of the entire enclosure goes down.

The most vulnerable place in an enclosure is between its body and its lid – here is where dust, moisture, and corrosion can creep in.

However, KDM designs sealing gaskets that are either moulded or screwed in place flush against the surface.

PU sealing gaskets

What are common designs for NEMA 4X enclosures?

Some common designs for NEMA 4X enclosures include free-standing, floor-mounted, wall-mounted, and custom.

自立型, 床置き型, and walk-in enclosures are all used for bigger equipment.

要件に応じて、ドアを 1 つまたは複数にすることができます。

Such enclosures can also have pedestals, casters, leveling feet, and lifting eyes to help install and move them around.

自立型エンクロージャ
壁掛け そして ポールマウント NEMA 4X enclosures are typically small and house fuses and switches.

これらは移動性は劣りますが、占有するスペースも少なくなります。

これらは、外部のみ、または内部要素も備えた特殊なブラケットを使用して取り付けられます。

壁掛け式エンクロージャ
Custom enclosures can be of any size, dimension; they can have any combination of features, such as doors, hinges, ventes, windows, and much more.

Custom 4X enclosure
Overall, higher NEMA ratings benefit from U-shaped designs since those require less seam welding, which is great for corrosion protection.

U-shaped enclosure (top part)

どのような追加機能が含まれることが多いですか?

通気口、窓、蝶番付きドア、錠、ケーブル管理システムなどをリクエストできます。

通気口, as well as radiating fans, provide a path for heat to escape through.

They cool down the electrical components of the enclosure.

通気口はより受動的な空気の流れを提供しますが、ファンは積極的に空気を動かし、急速に熱くなる機器を冷却するために使用されます。

This prolongs the life of the equipment and decreases the possibility of malfunctions and electrical fires like アークフラッシュ.

If you want to include a drainage opening, there should also be a removable plug.

Vented enclosure
これらは筐体内の空気圧を安定させ、筐体の電気部品を損傷する可能性のある結露を防ぎます。

ウィンドウズ 担当者が迅速かつ非侵襲的な方法で電気部品を検査するのに役立ちます。

And if something does go wrong, a window helps to see what is happening right away.

Usually, windows are made from polycarbonate.

窓付きの囲い 
蝶番ドア 筐体のドアまたはカバーがどのように、どの程度開くかを制御します。

You can also choose from a variety of handles for your hinged doors.

Some of the hinges we offer include continuous, offset, flag, spring-loaded, and more.

ロック, latches, and clamps add a layer of security to your NEMA 4X enclosure.

They make sure no one tampers with it or accidentally accesses its electrical components.

ケーブル管理システムには、フック、ラック、その他の整理機能が含まれる場合があります。

We also offer secondary features like file pockets, drip caps, switches, lights, and anything else you request.

  File pocket
File pockets store operating manuals; drip caps protect the enclosure from splashing water; solar shields protect against UV rays; switches and lights help operate the equipment inside the enclosure.

How do NEMA 4X enclosures maintain temperature?

Generally, enclosures can have air conditioners, coolers, heat exchangers, and heater strips to control the temperature inside the enclosure.

This prevents the equipment from overheating or freezing.

If your enclosures are for cold environments, then heat exchangers and heater strips may be necessary.

Heat exchangers are closed loop systems that are easy to maintain.

As equipment works, it may heat the air around it, and heat exchangers push hot air into colder compartments, which results in an equalized temperature and pressure.

Heat exchanger
Heater strips use electricity to heat up the air inside the enclosure to protect its contents from low temperatures, condensation, and subsequent corrosion on the inside.

Heater strip
Enclosure heaters range in performance from 50 to 1200 Watts, depending on the size of your enclosure.

Air conditioners and various air coolers are vital for enclosures situated in warm environments.

Equipment needs to be cooled down to prolong its life.

What materials are used for NEMA 4X enclosures?

これらは 亜鉛メッキ鋼、 そして ステンレス鋼 – 通常はグレード 304、316、または 316L です。

We do offer carbon steel, but it is not the best for 4X enclosures since this steel is more vulnerable to corrosion.

Stainless steel, on the other hand, is perfect for NEMA 4X.

It is created by adding chromium, nickel, and molybdenum to the iron-carbon alloy.

 ステンレス鋼と亜鉛メッキ鋼
鋼種 304 と 316 では、すべての添加剤の含有量が異なります。

316 stainless steel provides the best protection against salt spray, certain acids, and high temperatures.

This is why 316 is used more for marine applications.

Meanwhile, 304 resists sulfates and chlorine more.

亜鉛メッキ鋼 腐食を防ぐ亜鉛の保護層でコーティングされています。

このタイプの鋼はステンレス鋼よりも高価で重いです。

鋼を使用する場合、製造業者は、NEMA 規格に準拠するために必要な鋼板の特定のゲージまたは厚さを念頭に置く必要があります。

NEMA 4X enclosures use 16 or 14 ゲージ鋼, which is about 1.6-2 mm.

グラスファイバー 非常に強力で、熱を放散し、電気を絶縁し、干渉の影響とショックの可能性を低減します。

プラスチックの中にガラス繊維を入れて作られています。

 グラスファイバー 
エンクロージャはアルミニウム合金で作ることもできます。

これらは必ずしも鋼合金より優れているわけではありませんが、目的やニーズによっては優れている場合もあります。

鋼のグレードと同様に、アルミニウム合金は 5052 シリーズまたは 6061 シリーズのいずれかになります。

アルミニウムとステンレス鋼
どちらも軽量ですが、5052 は溶接性に優れ、6061 は耐腐食性に優れています。

また、6061 の方が高価です。

アルミニウムの表面には腐食を防ぐ酸化物の層があります。

For NEMA Type 4X enclosures, stainless steel grade 304, polymers like fiberglass, and aluminum 6061 are most recommended.

さらに詳しく知りたい方は、 お問い合わせを送信 今すぐご相談ください！

What paints and coatings can be used for NEMA 4X enclosures?

当社の筐体は十分に保護されていますが、適切なコーティングを施すことでさらに保護を強化できます。

アロジンコーティングとも呼ばれる クロメート化成コーティングは、塗装の下地として鋼鉄やアルミニウムに使用され、腐食を防止します。

アロジンコーティング
This is a cheaper process than anodizing, and can be recognized by its characteristic greenish-yellow hue unless it is painted over.

任意の色のエナメル塗装または粉体塗装を選択できます。

粉体塗料 is deposited with the electrostatic force and is quicker and easier than enamel.

外観もより柔軟で、光沢仕上げとマット仕上げのオプションが用意されています。

粉体塗装仕上げ
エナメル塗料 has a glossy finish and is weather-resistant.

陽極酸化処理 コーティングでは、陽極を使用して金属（通常はアルミニウム）を酸化し、厚さを増やして耐腐食性を高めます。

Anodizing a 4X aluminum enclosure can definitely be a plus.

Steel is not typically anodized because it can actually speed up its corrosion.

There can also be anti-graffiti and anti-poster coatings to protect your enclosure from vandalism if you plan to install it outdoors.

NEMA 4X enclosures most often use powder coating, but epoxy enamel and PU enamel are also great for industrial enclosures.

あらゆる色と仕上げのコーティングをご提供できますので、 お問い合わせ 今日！

How can symbols be put on a NEMA Type 4X enclosure?

You can customize your enclosure with our engraving and silk-screening services.

Silk Screening is the easiest and most affordable method.

Any flat side of the enclosure can be silk-screened with labels, warnings, serial number, your company name, logo, and anything else.

Although, beware!— silk-screening on stainless steel or aluminum can be worn or scratched off.

However, a clear powder coat can help prevent that.

  Silk-screening
Engraving the enclosure is your second choice of customizing your enclosures.

このオプションはシルクスクリーン印刷よりもコストがかかり、時間もかかりますが、より長期にわたります。

通常、表面から約 0.005 インチまたは 0.010 インチの金属が除去されます。

金属が取り除かれたら、ご要望に応じて任意の色のエポキシ塗料で塗りつぶします。

彫刻
Besides symbols, there should be other markings.

If the equipment has to be installed in a particular orientation, this has to be marked on the enclosure.

Also, areas where live parts will also have to have a mark.

Any warning or danger signs should also be engraved or silk-screened onto the enclosure as well.

エンクロージャを注文する際に他に注意すべきことはありますか?

人々が犯す一般的な間違いがいくつかあります。

これらには、間違った NEMA タイプ、間違った材料、間違ったサイズ、間違った設計の選択、機能の無視などが含まれます。

NEMA 4X is built for non-hazardous, indoor and outdoor locations with normal air pressure, rain or dripping water, some dust, snow, sleet, and ice.

NEMA 4X usually uses stainless steel 304 or aluminum to increase resistance to corrosion.

The size and the design of the enclosure depending on the specific electrical equipment you plan to house there.

However, NEMA 4X enclosures are usually medium-sized or big.

Another note is that if you are choosing stainless steel, be prepared that it is not stain-free.

Sometimes, corrosion does show in the form of mild staining, but it is easy to get rid of with just water.

As for the design and features, these are case-specific, so consult your manufacturer for advice.