Standards
W hat’s hat’s in a rating? As a way of standardizing standardizing enclosure performance, performance, organizations like like NEMA, UL, CSA NEMA, CSA,, IEC, and VDE use rat rating ing sys system temss to ide identi ntify fy an an enclosure’s ability to resist external environmental influences. Resistance to everything from dripping liquid to hose-down to total submersion is defined by the ratings systems.While systems. While these ratings are all intended to provide information information to help you make a safer, safer, more informed product choice, there are differences differences among them.
In North Amer America, ica, NEM NEMA, A, UL, and CSA are the commonly recognized organizations. Their ratings are based on s imilar application descriptions and expected expected performance. UL and CSA both require enclosure testing by qualified evaluators in their labs.They also send site inspectors to make sure a manufacturer adheres to prescribed manufacturing manufactur ing methods and material specifica spec ification tions. s. NEM NEMA, A, on the other hand, does not require independent testing and leaves compliance completely up to the manufacturer.
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Data subject to change without notice
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North American American enclosure rating systems also include a 4X rating that indicates resistance to corrosion.This rating is based on the enclosure’s ability to withstand prolonged exposure to salt water spray. While a 4X rating is a good indicator that an enclosure can can resist corrosion, corrosion, it does not provide information on how a specific corrosive agent will affect a given enclosure material. It is best to conduct a full analysis of the specific application and environment to determine the best enclosure enclosure choice. (See Chemical Resistance Charts starting on page A.20.)
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A T e c h n i c a l I n f o r m a t i o n
In Europe, IEC ratings are based based on performancee criteria similar to NEMA. performanc Nevertheless, Neve rtheless, there are differences differences in how enclosure performance performance is interpreted. For example, UL and CSA test requirements requirements specify that an enclosure fails the watertight test if even a single drop of water enters the enclosure. In the IEC standards for each protection protectio n level (IP), a certain amount of water is allowed to enter the enclosure.
Data subject to change without notice
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S t a n d a r d s
IEC does not specify degrees of protection against risk of explosion or conditions such as moisture or corrosive vapors. NEMA, on the other hand, hand, does specify specify for most environmental environmental conditions. For this reason, and because the tests and evaluations evaluations for other characteristics characteristics are not identical, the IEC enclosure classification designations cannot be exactly equated with NEMA enclosure Type Type numbers. num bers.
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Standards CE and IEC Classifications
CE The CE Mark is a European Union (EU) compliance symbol and acronym for Conformité Européenne.The Européenne.The CE Mark indicates that a product complies with all European directives and essential harmonized standards for health, safety safety,, environ environment, ment, and consumer protection that may apply to that product. In addition, addition, the CE Mark promotes free trade movement from outside and within the EU. For industrial control equipment, equipment, the CE Mark is not intended to be applied to empty enclosures because such enclosures are inactive components componen ts of a final assembly assembly.. The responsibility of ensuring compliance with all applicable EU directives and harmonized standards belongs with the final equipment manufacturer. Hoffman enclosures are designed in compliance with European standards and are eligible to receive a Manufacturer’s Declaration of Conformity.The Conformity .The certificate assists the final equipment manufacturer in obtaining the CE Mark. Contact Applications Applications Engineering at (763) 422-2175 for further information. Hoffman enclosures meet the requirements of the applicable European standards specified below.
Applicable European Directives 73/23/EEC Low Voltage Directive for Electrical Equipment within Certain Voltage Limits
International Standards IP Protection Classification IEC Publication 60529 Classification of Degrees of Protection by Enclosures provides a system for specifying enclosures of electrical equipment on the basis of the degree of protection protectio n required. IEC 60529 does not specify degrees of protection against risk of explosions or conditions such as moisture (produced, (produced, for example, by condensation), corrosiv corrosivee vapors, fungus, or vermin. NEMA Standards Publication 250 does test for environmental condition cond itionss such as corrosion corrosion,, rust, icin icing, g, oil, and coolants. For this reason, reason, and because the tests and evaluations for other characteristics are not identical, the IEC enclosure classification classification designations cannot be exactly equated with NEMA enclosure enclo sure Type Type numbers. numbers . The table on page A.07 provides a crossreference from NEMA enclosure Type numbers to IEC enclosure classification classification designations. This cross-reference is a Hoffman approximation based on the most current available information on enclosure test performance and is not sanctioned by NEMA, NEMA, IEC,VDE, or any affiliated agency. To use the table on page A.07, first find the appropriate NEMA rating along the vertical axis and then read across the horizontal axis for the corresponding corresponding IP rating. Do not use this table to convert IEC classification designations to NEMA Type numbers.
89/336/EEC EMC Directive Relating to Electromagnetic Compatibility 98/37/EC Machinery Directive Note:The EMC Directive Directive is only secondarily applicable since an empty enclosure does not produce electromagnetic interference.
Applicable International Standards IEC 60529 (IEC529) Degrees of Protection Provided by Enclosures
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IEC 60204 (IEC204) Electrical Equipment of Industrial Machines Data subject to change without notice FAX 763 422 2600 ¤ 763 422 2211
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IP Rating Categories
First Numeral IP 0
Second Numeral Protection of Persons
Protection of Equipment IP
No Protection
No Protection
Protected against contact with large areas of the body (back of hand)
0
No Protection
T e c h n i c a l I n f o r m a t i o n
Protected against vertically falling drops of water, e.g. condensation
Protected against objects over 50 mm in diameter
1
A
Protection of Equipment
1
Protected against contact with fingers
Protected against direct sprays of water up to 15 from vertical
Protected against solid objects over 12mm in diameter
2
2
Protected against tools and wires over 2.5 mm in diameter
3
Protected against solid objects over 2.5mm in diameter
Protected against sprays to 60 from vertical vertical
3
Protected against tools and wires over 1 mm in diameter
4
Protected against solid objects over 1mm in diameter
Protected against water sprayed from all directions (limited ingress permitted)
4
Protected against tools and wires over 1mm in diameter
5
Protected against dust (limited ingress, no harmful deposit)
5
Protected against tools and wires over 1mm in diameter
6
S t a n d a r d s
Protected against low pressure jets of water from all directions (limited ingress permitted)
Protected against strong jets of water
Totally protected against dust
6
7
8
Protected against the effects of immersion between 15 cm and 1 m
Protected against long periods of immersion under pressure CE IEC SYMBOLS
Example Rating If 1st IP number is...
and the 2nd IP number is...
Then the IP rating
2
3
IP 2 3
(protec (pro tectio tion n agai against nst sol solid id obj object ects) s)
(protec (pr otectio tion n agai against nst liq liquid uids) s)
(An enc enclos losure ure wit with h this this des design ignati ation on pro provie viess prot protect ection ion aga agains instt touc touch h with with a fing finger er and pen penetr etratio ation n of of solid objects greater than 12mm and against sprauying water.)
Data subject to change without notice
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Standards NEMA, NEM A, UL, and CSA Rat Rating ingss NEMA,, UL, and CSA NEMA CSA Ratings Ratings NEMA, UL, and CSA are standard standard writing organizations organizations commonly recognized recognize d in North America.Their ratings are based on similar application descriptions descriptions and expected performance. performance. UL and CSA both require enclosure enclosure testing by qualified evaluators.They also send site
inspectors to make sure a manufacturer adheres to prescribed manufacturingg methods and material specifications. manufacturin specifications. NEMA, on the other hand, does not require independent independent testing and leave leavess compliance completely up to the manufacturer.
Enclosure Types Non-Hazardous Location Enclosure Rating
National Electrical Manufacturers Association (NEMA Standard 250) and Electrical and Electronic Mfg. Association of Canada (EEMAC)
Underwriters Laboratories Inc. (UL 50 and UL 508)
Canadian Standards Association (Standard C22.2 No. 94 94)
Type 1
Enclosu Encl osures res are are int intend ended ed for for indo indoor or use use prima primaril rily to p ro ro vivi de de a de de gr gr ee ee of of pr pr ot ot ec ec titi on on a ga ga in in st st co co nt nt ac ac t w itit h t he he enclosed o sed equipment p ment or loca locatio tions ns where where unu unusual sual service ce conditions do not exist.
Indoo In doorr use pri primar marilily to provi provide d e prot protec ectition on agai against nst con conta tact ct w it h t he he e nc nc lo lo se se d e qu qu ip ip me me nt nt an an d a ga ga in in st st a lili mi mi te te d amount amou nt of of fall falling i ng dir dirt. t.
Genera Gen erall purpo purpose se encl enclosu osure re.. Pro Prote tect ctss again against st acci accident d ental al c on on ta ta ct ct wi wi th th lili ve ve pa pa rtrt s. s.
Type 3
Enclosu Encl osures res are int intend ended ed fo forr outd outdoor oor use primaril m arilyy to to provi pro vide de a degre degreee of prot protec ectition on agai against nst wi wind ndbl blown own dust dust,, ra in, a nd nd slsle et et; un da dam ag aged by by th the fo for ma mation of of ice on on th the enclosure.
Outd Ou tdoo oorr use use to to prov provid idee a de degre greee of pro prote tect ction ion ag agai ainst nst windblo n dblown wn dust dust and and win windbl dblown o wn rain rain;; und undama amaged ged by by the the fo rm rma tition of of ic e on th the en enc losur e. e.
Indoor Ind oor or out outdoo doorr use; use; pro provi vides des a degr degree ee of of pro prote tect ction ion against again st rain rain,, sno snow w, and win windb dblo lown wn dust dust;; un undam damage agedd by the ex exter na na l for ma mation of of ice on on th th e enc lo su sur e. e.
a Type 3R
Enclosu Encl osures res are int intend ended ed fo forr outd outdoor oor use primaril m arilyy to to p ro ro vivi de de a d eg eg re re e of of p ro ro te te ct ct io n ag ag ai ai ns ns t fa fa l in g ra ra in in a nd nd slee t; un und ama ged by th e for m ation of ic e on the enclosure.
Outd Ou tdoo oorr use use to to prov provid idee a de degre greee of pro prote tect ction ion ag agai ainst nst f al al li ng ng r ai ai n; n; u nd nd am am ag ag ed ed b y t he he f or or ma ma titi on on o f i ce ce o n th e enclos ur e.
Indoor Ind oor or out outdoo doorr use; use; pro provi vides des a degr degree ee ooff pro prote tect ction ion a ga ga in st st r ai ai n an an d sn sn ow ow ; u n da da ma ma ge ge d by by t he he e xt xt er er na na l for m ation of ice o n th e enclo sur e.
E nc nc lo lo su su re re s a re re in in te te nd nd ed ed fo fo r i nd nd oo oo r o r o ut ut do do or or us us e p riri ma ma riri ly t o p ro ro vivi de de a d eg eg re re e o f p ro ro te te ct ct io n a ga ga in st st wind wi ndbl blow ownn dus dustt and and rain, n , splashin a shingg wate waterr, and ho hose se dir ected water; un u nda ma ged by th e fo r ma tio n of ic e on the enclosure.
E itit he he r i nd nd oo oo r o r o ut ut do do or or us us e t o p ro ro vi vi de de a d eg eg re re e o f p ro ro te te ct ct io n a ga ga in in st st f al al li ng ng r ai ai n, n, s pl pl as as hi hi ng ng w at at er er, a nd nd hoseho se-di direc recte tedd wat water er;; un undam damag aged ed by th thee form format atio ionn of of ice ice on the enc losur e.
I nd nd oo oo r o r o ut ut do do or or us us e; e; p ro ro vivi de de s a de de gr gr ee ee of of pr pr ot ot ec ec titi on on a ga ga in in st st r ai ai n, n, s no no w, w, w in in db db lo lo wn wn d us us t,t, s pl pl as as hi hi ng ng an an d hose-d hos e-dire irect cted ed wa wate ter; r; un undam damage agedd by by the the ex exte terna rnall for m ation o f ice o n th e enclo sur e.
Type 4X
E nc nc lo lo su su re re s a re re in in te te nd nd ed ed fo fo r i nd nd oo oo r o r o ut ut do do or or us us e p riri ma ma riri ly t o p ro ro vivi de de a d eg eg re re e o f p ro ro te te ct ct io n a ga ga in st st corro co rrosi sion,wind on,windbl blown own dus dustt and rain rain,, splashin a shingg water water,, an andd hos ee-d ir ec ec te te d water; un da dam ag age d by th the fo for ma mation of of ic ice on the enclosure.
E itit he he r i nd nd oo oo r o r o ut ut do do or or us us e t o p ro ro vi vi de de a d eg eg re re e o f p ro ro te te ct ct io n a ga ga in in st st f al al li ng ng r ai ai n, n, s pl pl as as hi hi ng ng w at at er er, a nd nd hoseho se-di direc recte tedd water water;; un undam damag aged ed by the the format formatio ionn of ice on th the en enc losur e; e; r es esists co cor ro ros ion.
I nd nd oo oo r o r o ut ut do do or or us us e; e; p ro ro vivi de de s a de de gr gr ee ee of of pr pr ot ot ec ec titi on on a ga ga in in st st r ai ai n, n, s no no w, w, w in in db db lo lo wn wn d us us t,t, s pl pl as as hi hi ng ng an an d hose-d hos e-dire irect cted ed wate water; r; un undam damage agedd by the exte externa rnall for ma mation of of ic ice on on th th e enclo su sur e; e; re sisists co co rrrr os os io n. n.
Type 6
Enclosu Encl osures res are int intend ended ed for for use use indoors n doors or out outdo doors ors w he he re re o cc cc as as io io na na l su su bm bm er er si si on on i s e nc nc ou ou nt nt er er ed ed . lilimi mite tedd dept depth; h; und undama amaged ged by the the form format atio ionn of ic icee on the enc lo sur e.
Indoo Ind oorr or out outdo door or use use to to provi provide d e a de degre greee of pro prote tecti ction on a ga ga in in st st e nt nt ry ry o f w at at er er d ur ur in in g te te mp mp or or ar ar y su su bm bm er er si si on on a t a at a limited m ited dept depth; h; und undama amaged ged by the the ext extern ernal al form format atio ionn of ic e on the enc losur e.
Indoo Ind oorr or out outdoo doorr use; use; pro provi vides des a degre degreee of pro prote tecti ction on a ga ga in st st th th e en en trtr y of of wa wa te te r du du riri ng ng t em em po po ra ra ry ry s ub ub me me rs rs io io n at a lilimit mited ed dep depth th.. Un Undam damage agedd by th thee exte externa rnall form format ation ion of ice o n th e enclos ur e; res ists co rr os io n.
Type 12
E nc nc lo lo su su re re s ar ar e in te te nd nd ed ed f or or i nd nd oo oo r us us e pr pr im ar ar ilil y to to provi pro vide de a de degre greee of pro prote tect ctio ionn aga again inst st dus dust, t, fa fallllin ingg di dirt, rt, and dr dripp in g no nonc or ros ive liquids.
I nd nd oo oo r us us e to to p ro ro vi vi de de a de de gr gr ee ee o f p ro ro te te ct ct io n ag ag ai ai ns ns t dust,, di dust dirt rt,, fiber b er flflyi yings ngs,, drippin p pingg wa wate terr, an andd ext extern ernal al cond ensa tio n of of n onco rr os iv e liquids.
I nd nd oo oo r us us e; e; p ro ro vivi de de s a de de gr gr ee ee o f p ro ro te te ct ct io n ag ag ai ai ns ns t circulatin circul a tingg du dust st,, lilint nt,, fifibe bers rs,, and flyings y ings;; drippin p pingg and liligh ght t s plas hing of of no non- cor r osiv e liq uids; n ot pr pr ovide d wi with knockouts.
Type 12K
Enclosures with knockout Enclosures knockoutss are intend intended ed for indoor use primaril m arily to pro provi vide de a de degre greee of pro prote tect ctio ionn aga again inst st dus dust, t, f al al li ng ng d ir t,t, a nd nd d riri pp pp in in g no no nc nc or or ro ro si si ve ve l iq ui ui ds ds.
Indoor use to provide a degree of protect protection ion against dust du st,, di dirt rt,, fiber b er flflyi yings ngs,, drippin p pingg wa wate terr, an andd ext extern ernal al c on on de de ns ns at at io n of of n on on co co rrrr os os iviv e lili qu qu id id s. s. K no no ck ck ou ou ts ts l oc oc at at ed ed in the to p or b ottom walls, or or both.
Indoor use: provides a degree of protect protection ion aganst circulatin circul a tingg du dust st,, lilint nt,, fifibe bers rs and flyings y ings;; drippin p pingg and l ig ht ht s pl pl as as hi hi ng ng o f n on on -c -c or or ro ro si si ve ve l iq ui ui ds ds ; p ro ro vi vi de de d wi wi th th k nock outs.
Enclosu Encl osures res are int intend ended ed for for ind indoo oorr use use prima primaril rily to provi pro vide de a deg degree ree of pro prote tect ctio ionn aga again inst st dus dust, t, spr spray ayin ingg of of water, o il, a n d nonc orr os ive co olant.
Indoo In doorr use use to pro provi vide de a de degre greee of pro prote tect ction ion ag agai ainst nst lint, n t, dust see dust seepa page ge,, ex exte terna rnall con conden densat sation ion an andd spr sprayi aying n g of water, o il, a nd n onco rr os iv e liquids.
Indoor Ind oor use use;; pro provi vides des a degre degreee of pro prote tect ction ion ag agai ainst nst circulatin circul a tingg dust dust,, lilint nt,, fifibe bers rs,, and flyings y ings;; see seepa page ge an andd s pr aying o f no n-c or ros ive liquids, in i n c l u d i n g o il s a n d coolants.
Type 4
Type 13
a NFPA 70 (National Electric Code) defines new Type Type 3RX as providing the same degree of protection as Type 3R, with the addition of protection against corrosive agents. This mat materi erial a l is rep reprod roduc uced ed wi with th pe permi rmissi ssion o n fr from om NE NEMA. MA. The prec precedi eding n g descr descript iptio ions ns,, ho howe wever ver, are not not intend intended ed to b e co co mp mp le le te te r ep ep re re se se nt nt at at io ns ns o f Na Na titi on on al al E le le ct ct riri ca ca l Manufac Manu facture turers rs Asso Associa ciatio tionn stan standard dardss for for enclosures o sures nor those th ose of th thee El Elec ectri trical c al an andd Ele Elect ctron ronic ic Man Manuf ufact actur urers ers Association of Canada.
This Th is mat materi erial a l is rep reprod roduc uced ed wi with th per permi missi ssion o n fro from m Underwr Unde rwrititers ers Labo Laborat ratori ories e s Inc.Encl Inc.Enclos osure uress for Elect Electri rical cal E qu qu ip ip me me nt nt , U L 50 50 , C o py py riri gh gh t 19 19 99 99 a nd nd I nd nd us us trtr ia l Control Con trol Equipment, p ment, UL 508 508,, Copy Copyrigh rightt 2001 2001 by Unde Un derwr rwrititers ers Lab Labora orato torie riess Inc Inc..
This Th is mat materi erial a l is rep reprod roduce ucedd wit withh perm permis issi sion on fr from om th the e Canadia Canad iann Standa Standards rds Asso Associ ciat ation ion..
Underwriters Laboratories Inc. (UL) shall not be responsible for the use of or reliance upon a UL Standard by anyone. UL shall not incur ncur any obligation or liability for damages, including consequential damages, arising out of or connection with the use, use, interpretation of, or reliance upon a UL Standard.
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Data subject to change without notice
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Comparison of Specific Non-Hazardous Applications Applications Outdoor Locations Provi de des a Degree of Protection Against the Following Environmental Conditions
Type of Encl os osure 3 3Ra
3RXa
4
4X
Incidental contact with the enclosed equipment Rain,snow, and sleet sleet b
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
A
6
Sleet c Windblown dust
•
Hose-down Corrosive agents
•
•
Occasional temporary submersion a b c
•
These enclosures may be ventilated. External operating mechanisms are not required to be operable when the enclosure is ice covered. External operating mechanisms are operable when the enclosure is ice covered.
Comparison of Specific Non-Hazardous Applications Applications Indoor Locations Provides Provid es a Degr Degree ee of Pro Protec tectio tion n Agai Against nst the th e Fo Foll llow owin ing g En Envi viro ronm nmen enta tall Co Cond ndit itio ions ns
Type of Enc Type Enclos losure ure 1a 4
4X
6
11
12
12K
Incidental contact with the enclosed equipment
•
•
•
•
•
•
•
•
Falling dirt
•
•
•
•
•
•
•
•
•
Falling liquids and light splashing Dust,lint, fibe fibers, rs, and flying flyingss b
•
•
•
•
•
•
Hose-down and splashing water
•
•
•
Oil and coolant seepage
13
•
•
•
•
•
•
•
•
Oil or coolant spraying and splashing
• •
Corrosive agents
•
Occasional temporary submersion
• •
a These enclosures may be ventilated. However However,, Type 1 may not provide protection against small particles of falling dirt when ventilation is provided in the enclosure top. Consult Hoffman for more information. b These fibers and flyings are non-hazardous materials and are not considered Class II type ignitable fibers or combustible flyings. For Class III type ignitable fibers or combustible flyings see the National Electrical Code Section 505. The preceding tables are reproduced by permission of the National Electrical Manufacturers Association from NEMA Standards Publication 250 “Enclosures for Electrical Equipment (1000 Volts Maximum),” copyright 1997 by NEMA.
Data subject to change without notice
T e c h n i c a l I n f o r m a t i o n
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S t a n d a r d s
Industry Standards
Cross-Reference (Approximate) NEMA NEMA,, UL, CSA, vs. IEC Enclosur Enclosure e Type (Cannot be used to convert IEC Classifications to NEMA Type Numbers) Enclosure Rating Type 1
IP20
IP22
IP55
IP64
IP65
IP66
IP67
•
Type 3
•
Type 3R 3RX
•
Type 4
•
Type 4X
•
Type 6
•
Type Typ e 12, 12K
•
Type 13
•
IEC 60529 60529 has no equivalents equivalents to NEMA NEMA enclosure enclosure Types Types 7, 8, 9, 10, or 11. • Indicates Indicates compliance. compliance.
Enclosure Type Rating vs. IP Rating Electrical enclosures enclosures are rated by type (NEMA 250 / UL 50), and/or IP rated (IEC 60529) based on the degree of protection protection provided. provided. Type ratings and IP ratings have only the following in common: 1. A degree of protection for persons from from hazardous components components inside the enclosure 2. A degree of protection protection for equipment equipment inside the enclosure enclosure from ingress of solid foreign foreign objects, including dust 3. A degree of protection for equipment equipment inside the enclosure from from ingress of water NEMA 250 and UL 50 type rating documentation defines additional requirements requirements that a type-rated enclosure enclosure must meet.These include: • Mec Mechani hanical cal impact impact on enclosu enclosure re walls walls • Gask Gasket et aging aging and and oil resist resistance ance • Cor Corro rosio sion n resista resistanc ncee • Door and and cover cover latching latching require requirement mentss • Sheet metal metal gauge construction requir requirements ements (UL (UL 50 only) Electrical enclosures enclosures that carry only an IP rating have not been designed to the additional type-rating requirements.Therefore, requirements.Therefore, a type rating cannot be assigned to an enclosure that has been only IP-rated. Electrical enclosures manufactured by Hoffman are tested for both type-rating and IP-rating and carry both type and IP ratings.
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Data subject to change without notice
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Glossary Terms Specifying Non-hazardous Environmental Conditions Corrosion-Resistant
Rain-tight
Oil-Resistant
Constructed to provide a degree of protection against exposure to corrosive agents such as salt spray.Type 4X enclosures meet this requirement.
Constructed so that oil will not interfere with successful operation of equipment. Type 12 and 13 enclosures meet this requirement.
Dust-tight
Oil-tight
Constructed so that circulating or airborne dust will not enter the enclosure under specifie spec ified d test cond condition itions.T s.Type ype 3, 4, 4X, 12, 12K, and 13 enclosures enclosures meet this requirement. Drip-tight
Constructed so that falling moisture or dirt does not enter the enclosure under specified test cond condition itions.T s.Type ype 3, 4, 4X, 12, 12K, and 13 enclosures meet this requirement. Indoor
Not to be exposed to weather weather.Type .Type 1, 3, 3R, 4, 4X, 6, 12, 12K, and 13 13 enclo enclosure suress meet meet this this requirement.
Constructed so that oil will not enter the enclosure under specified test conditions. Type 13 enclosures meet this requirement. Outdoor
Constructed or protected so that exposure to the weather will not interfere with successful operation of equipment.Type 3, 3R, 4, 4X, and 6 enclosur enclosures es meet meet this requirement. Rainproof
Constructed, protecte protected, d, or treated to prevent beating rain from interfering with the successful operation of the apparatus or result in wetting of live parts and wiring within the enclosure under specified test conditions.Type 3R enclosures meet this requirement.
Constructed or protected so that exposure to beating rain will not result in water entering the enclosure under specified test condition cond itions.T s.Type ype 3, 4, 4X, and 6 encl enclosur osures es meet this . Water-tight
Constructed so that moisture will not enter the enclosure when it is subjected to a stream of water under specified test conditions.Type conditions.T ype 4, 4X, and 6 enclosures enclosures meet this requirement. Weatherproof
Constructed or protected so that exposure to the weather will not interfere with successful operation of the equipmen equipment. t. Rainproof, rain-tight, or water water-tight -tight equipment can fulfill the requirements for weatherproof where varying weather conditions other than wetness, wetness, such as snow, ice, dust, or temperatu temperature re extreme extremes, s, are not a factor.
A T e c h n i c a l I n f o r m a t i o n
Wett Locations We
See Rainproof.
S t a n d a r d s
Data subject to change without notice
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