我們都熟知IP評(píng)級(jí)，但是你知道NEMA評(píng)級(jí)嗎？

NEMA評(píng)級(jí)多用于附件。

NEMA 1 General Purpose - Indoors

Type 1 enclosures are intended for general purpose indoor use primarily to provide a degree of protection against contact with the enclosed equipment or locations where unusual service conditions do not exist.

類型1外殼通常用于室內(nèi)使用，主要提供一定程度的防止與封閉設(shè)備或不存在異常使用條件的位置的接觸。

NEMA 2 Drip Proof - Indoors

Type 2 enclosures are intended for general purpose indoor use primarily to provide a degree of protection against limited amounts of falling water and dirt.

類型2外殼用于室內(nèi)使用的一般用途，主要用于提供一定程度的防止有限量的下落的水和污垢。

NEMA 3 Dust Tight, Rain Tight, & Ice/Sleet resistant - Indoors/Outdoors

Type 3 enclosures are intended for general purpose outdoor use primarily to provide a degree of protection against windblown dust, rain, and sleet; and to be undamaged by the formation of ice on the enclosure.

類型3外殼用于通常用于戶外使用，主要提供一定程度的防止風(fēng)吹灰塵，雨水和雨夾雪; 并且通過在外殼上形成冰而不受損壞。

NEMA 3R Rain Proof & Ice/Sleet Proof - Indoors/Outdoors

Type 3R enclosures are intended for general purpose outdoor use primarily to provide a degree of protection against falling rain; and to be undamaged by the formation of ice on the enclosure.

3R型外殼適用于通用戶外使用，主要提供一定程度的防雨保護(hù); 并且通過在外殼上形成冰而不受損壞。

NEMA 3S Dust Tight, Rain Tight, & Ice/Sleet Proof - Outdoors

Type 3S enclosures are intended for general purpose outdoor use primarily to provide a degree of protection against sleet; and to be undamaged by the formation of ice on the enclosure.

3S型外殼用于通用戶外使用，主要用于提供一定程度的防雨雪保護(hù); 并且通過在外殼上形成冰而不受損壞。

NEMA 4 Water Tight & Dust Tight - Indoors/Outdoors

Type 4 enclosures are intended for general purpose indoor or outdoor use primarily to provide a degree of protection against windblown dust and rain, splashing water, and hose directed water; and to be undamaged by the formation of ice on the enclosure.

4類外殼用于室內(nèi)或室外使用的一般用途，主要用于提供一定程度的防止風(fēng)吹灰塵和雨水，飛濺水和軟管引導(dǎo)水; 并且通過在外殼上形成冰而不受損壞。

NEMA 4x Water Tight, Dust Tight, & Corrosion Resistant - Indoors/Outdoors

Type 4X enclosures are intended for general purpose indoor and outdoor use primarily to provide a degree of protection against corrosion, windblown dust and rain, splashing water, and hose-directed water; and to be undamaged by the formation of ice on the enclosure.

4X型箱體用于室內(nèi)和室外使用，主要用于提供一定程度的防腐蝕，吹風(fēng)灰塵和雨水，飛濺水和軟管導(dǎo)向的水; 并且通過在外殼上形成冰而不受損壞。

NEMA 5 Superseded by NEMA 12 for Control Apparatus

Type 5 see NEMA 12

參見NEMA 12

NEMA 6 Submersible, Water Tight, Dust Tight, & Ice/Sleet Resistant - Indoors/Outdoors

Type 6 enclosures are intended for general purpose indoor or outdoor use primarily to provide a degree of protection against the entry of water during temporary submersion at a limited depth; and to be undamaged by the formation of ice on the enclosure.

6型外殼用于室內(nèi)或室外使用的一般目的，主要是為了在有限深度的臨時(shí)浸沒期間提供一定程度的防止水進(jìn)入的保護(hù); 并且通過在外殼上形成冰而不受損壞。

NEMA 7 Underwriters Lab Class 1-Groups C&D -Explosion Proof - Indoors

Type 7 enclosures are for indoor use in locations classified as Class I, Groups A, B, C, or D, as defined in the National Electrical Code.

Type 7 enclosures shall be capable of withstanding the pressures resulting from an internal explosion of specified gases, and contain such an explosion sufficiently that an explosive gas-air mixture existing in the atmosphere surrounding the enclosure will not be ignited. Enclosed heat generating devices shall not cause external surfaces to reach temperatures capable of igniting explosive gas-air mixtures in the surrounding atmosphere. Enclosures shall meet explosion, hydro-static, and temperature design tests.

類型7外殼用于在國(guó)家電氣規(guī)范中定義的分類為I類，A，B，C或D組的室內(nèi)使用。

7型外殼應(yīng)能承受特定氣體內(nèi)部爆炸所產(chǎn)生的壓力，并且包含足夠的爆炸，以使存在于外殼周圍大氣中的爆炸性氣體-空氣混合物不會(huì)被點(diǎn)燃。 封閉式發(fā)熱裝置不應(yīng)使外表面達(dá)到能夠點(diǎn)燃周圍大氣中的爆炸性氣體-空氣混合物的溫度。 外殼應(yīng)滿足爆炸，靜水壓和溫度設(shè)計(jì)試驗(yàn)。

NEMA 8 Underwriters Lab Class 1-Groups C&D -Explosion Proof - Indoors

Type 8 is same as NEMA 7, except the unit is oil-immersed.

類型8與NEMA 7相同，只是單元是浸油的。

NEMA 9 Underwriters' Lab Class II - Groups E,F,G - Indoors

Type 9 enclosures are intended for special purpose indoor use in locations classified as hazardous (Class II, Groups E, F, or G, as defined in the National Electrical Code).

Type 9 enclosures shall be capable of preventing the entrance of dust. Enclosed heat generating devices shall not cause external surfaces to reach temperatures capable of igniting or discoloring dust on the enclosure or igniting dust-air mixtures in the surrounding atmosphere. Enclosures shall meet dust penetration and temperature design tests, and aging of gaskets (if used).

9型外殼用于在危險(xiǎn)場(chǎng)所（II級(jí)，E，F(xiàn)或G組，國(guó)家電氣規(guī)范中定義）的室內(nèi)特殊用途。

9型外殼應(yīng)能防止灰塵進(jìn)入。 封閉式發(fā)熱裝置不應(yīng)使外表面達(dá)到能夠點(diǎn)燃或褪色外殼上的灰塵或點(diǎn)燃周圍大氣中的灰塵-空氣混合物的溫度。 外殼應(yīng)滿足灰塵滲透和溫度設(shè)計(jì)試驗(yàn)，以及墊圈（如果使用）的老化。

NEMA 10 Bureau of Mines

NEMA 11 Corrosion Resistant & Drip Proof - Oil Immersed - indoors

NEMA 12 Industrial Use - Dust Tight & Drip Tight - Indoors

Type 12 enclosures are intended for industrial indoor use primarily to provide a degree of protection against dust, falling dirt, and dripping noncorrosive liquids.

12型外殼適用于工業(yè)室內(nèi)使用，主要提供一定程度的防塵，防灰塵和非腐蝕性液體的防護(hù)。

NEMA 13 Oil Tight & Dust Tight - Indoors

Type 13 enclosures are intended for industrial indoor use primarily to provide a degree of protection against dust, spraying of water, oil, and noncorrosive coolant.

13型外殼適用于工業(yè)室內(nèi)使用，主要提供一定程度的防塵，防水，防油和非腐蝕性冷卻液的防護(hù)。

NEMA評(píng)級(jí)和IP外殼等級(jí)比較（比較僅為近似的）

內(nèi)容來(lái)自:懶蟲工控 原文鏈接：http://www.lanchonggk.com/thread-2350-1-1.html