Enclosure Protection Ratings & Standards

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All Enclosure Rating Types

Ratings and criteria indicate safety and security. Electrical cabinet enclosures are evaluated based on their appropriateness for certain applications and the level of equipment protection they provide. Each form of enclosure is assigned a rating depending on its capacity to resist environmental conditions. Our ratings include:

エンクロージャー定格

Why Enclosures Have NEMA And IP Ratings

“Waterproof” and “sealed” are ambiguous. They're not useful for enclosure selection. Design engineers must know “exactly how waterproof?” Is the enclosure for dripping water or full submersion? Designers must protect their electronic and electrical components from moisture, dust, and other pollutants.

That’s why electrical enclosures are rated based on their ability to withstand a varying degree of environmental elements, including dust, water, and ice. 

The enclosure maker should give testing results upon request to prove a rating. Because testing takes time and money, manufacturers don't usually employ NEMA and IP ratings for enclosures. Understanding rating systems allows you to confidently say that a NEMA-rated enclosure provides equal protection to an IP-rated enclosure and vice versa.

IP Enclosure Ratings Chart

IP説明
IP44エンクロージャー内に直径1mmを超える固体粒子が侵入しないよう、密閉された機器を保護すること。
IP54水や雨の飛沫から電気機器を保護できるため、交通管制キャビネットとしてよく使用される。
IP55風による粉塵や水の浸入をある程度防ぐ耐候性のエンクロージャー。
IP56NEMA 3エンクロージャとよく似た設計ですが、3Rエンクロージャは換気が可能です。
IP57耐候性に優れているため、しばしばレインタイト・エンクロージャーと呼ばれる。
IP65一般に、腐食性物質から保護するため、304および316ステンレス鋼を使用して製造される。
IP66パンチアウトのない防塵エンクロージャー。
IP67水深15cmから1mに一時的に30分間浸漬した際の水濡れから保護する。
IP68水深1.5mに30分間沈めると、水によるダメージから保護される。

NEMA Enclosure Ratings Chart

NEMA説明
NEMA 1General-purpose enclosures are typically manufactured to protect live parts.
NEMA 2Offer the same level of protection as NEMA 1, but NEMA 2 enclosures are drip-tight.
NEMA 3風による粉塵や水の浸入をある程度防ぐ耐候性のエンクロージャー。
NEMA 3RNEMA 3エンクロージャとよく似た設計ですが、3Rエンクロージャは換気が可能です。
NEMA 4Often called rain-tight enclosures due to their excellent weather resistance.
NEMA 4x一般に、腐食性物質から保護するため、304および316ステンレス鋼を使用して製造される。
NEMA 5一般に、腐食性物質から保護するため、304および316ステンレス鋼を使用して製造される。
NEMA 6一般に、腐食性物質から保護するため、304および316ステンレス鋼を使用して製造される。
NEMA 12Dust-tight enclosures that are constructed without punch-outs.
NEMA 13Built for indoor industrial applications that require protection from dust, lint, splashing oil, and non-corrosive liquids.

All Enclosure Rating Types

NEMA And IP Enclosure Protection Ratings FAQs

1.What is the difference between NEMA and IP rating?

An IP rating solely evaluates protection against the entrance of solid foreign objects and water, whereas NEMA ratings take into account corrosion and structural details. A NEMA type can be compared to an IP rating, but the reverse is not true. The comparison between NEMA and IP inclosure ratings is merely approximative.

続きを読む NEMA規格とIP規格:その違いとは?

2.Is NEMA the same as IP?

While NEMA and IP ratings are not the same, they are quite comparable and may sometimes be used interchangeably for evaluating enclosures for industrial situations. IP ratings are primarily concerned with protecting against the intrusion of solid foreign objects or liquids, whereas NEMA ratings also address additional circumstances, such as the presence of corrosive substances.

3.Is NEMA 4X the same as IP65?

In general, an IP65 enclosure and a NEMA 4 enclosure offer essentially equivalent levels of protection. The primary difference between the two is corrosion prevention. Because IP enclosures are not certified for corrosion protection, a NEMA 4X enclosure is essential for applications requiring corrosion resistance.