The Mysteries of IP65, IP66, and IP67 Rated Enclosures Explained

It is often confusing for an engineer to know what type of rating they need to look for when they desire to have a “waterproof” enclosure.  Much like with watches or other sensitive information, there is a big difference between waterproof, water resistant, and other descriptive but not specific labels.  To help out, there are several rating systems that have been developed although and several testing agencies that verify the results. Among these, the two best known are NEMA and IP. This blog will deal only with the IP system.

For enclosures, the typical “waterproof” IP ratings are IP67, IP66 and IP65 enclosures.  The chart below gives the specifics of what these ratings mean and how they are measured.

  IP Rating Protection Description Test Method

IP65 Enclosures

Able to protect against water jets Water projected by a nozzle (6.3 mm) against enclosure from any direction shall have no harmful effects. Test duration: at least 15 minutes
Water volume: 12.5 litres per minute
Pressure: 30 kPa at distance of 3 m

IP66 Enclosures

Able to protect against powerful water jets Water projected in powerful jets (12.5 mm nozzle) against the enclosure from any direction shall have no harmful effects. Test duration: at least 3 minutes
Water volume: 100 litres per minute
Pressure: 100 kPa at distance of 3 m

IP67 Enclsoures

Able to protect against Immersion up to 1 m Ingress of water in harmful quantity shall not be possible when the enclosure is immersed in water under defined conditions of pressure and time (up to 1 m of submersion). Test duration: 30 minutes
Immersion at depth of at least 1 m measured at bottom of device, and at least 15 cm measured at top of device

 IP65 enclosure, PN clear lid - MB

IP ratings, or ingress protection, were developed by the IEC (International Electrotechnical Commission) and are most heavily used in Europe and Asia, with some adherents in North America as well.  Since these are international standards, the testing is often certified by the TUV instead of UL, although both provide stringent testing.  One area to note is that while these are developed to deal with harsh environments, they do not address UV protection standards (outdoor) and the engineer should look for or ask about the ability of the enclosure to include UV protection materials.

In a later Blog, I will discuss NEMA ratings and how they relate to the IP standard.


About Blair Haas

CEO Bud Industries
This entry was posted in IP 65 66 67 Enclosure. Bookmark the permalink.

135 Responses to The Mysteries of IP65, IP66, and IP67 Rated Enclosures Explained

  1. Sadhana says:

    Its has to be very useful and short and clear!!!!

  2. Robert says:

    Thank you for the clear and precise definition. IP66 would seem to be aimed at areas of high humidity. Regardless, my customer desires IP66 in a Southern California area. Perhaps they are over spec’ing the project.

  3. paul muigai says:

    cool stuf.i now get
    the ip meaning

  4. Michael Rizzi says:

    Hi I’m installing IP66 rated cameras in freezers which are at -28degrees, just wondering of these are suitable, thanks

  5. Attila says:

    It’s TÜV not TUV.

  6. Steve Jobs says:

    It’s not the keyboard, Blair, it’s the font. Special characters like Ü aren’t built into a lot of the fonts from Microsoft.

  7. John Van Allen says:

    Is there a rating system for lights exposed to salt spray found at homes right on beachfronts. I have been taken to the cleaners by some China led floodlight sources who claim that the lights will be fine in such an environment and 3 months after installation they are rusting and corroded.

    • mm Blair Haas says:

      John, sorry it took so long to answer. You want to make sure that these meet either NEMA 4x or 6p – both of those letters advise that the units have been salt spray tested. IP ratings do not deal with corrosion.

  8. Dave says:

    Question… We have parts that need only the exposed surface IP tested. For example, a car radio could have the user interface portion (exposed surface) protected, while the non-exposed surface (area not seen) would not need protection. Can we have our parts IP tested with that (exposed surface only) as the objective?

    • mm Blair Haas says:

      This would be difficult to do based on the tests that go into the rating. For example, the spray test would not be able to be directed only to the suggested surface as there would be overspray. Typically in this situation, the box is tested before any modifications (ventilation, holes cut, etc.) and then as long as the exposed surfaces are protected (i.e. gaskets around the connectors), you should be safe.

  9. prashanth kumar says:


  10. Shawn says:

    I’m just wondering if IP67 and IP68 are better than IP66 in all cases.

    Example being equipment such as lighting and switches for an ATV. They do get submerged which in deeper water crossings. ATV’s are, however, often scrubbed down with pressure washers at close range.

    Does something that has a rating of IP67/IP68 not only protect against submersion but the same high pressures as is offered by IP66?


    • mm Blair Haas says:

      Hi Shawn

      The pressure provided during the submersion tests for IP67 and IP68 is greater than that produced during the spray tests, so the IP 67/68 would provide even greater protection against spray than the IP65 and IP66. Thank you for such a good question

      • Simon says:

        This is incorrect.
        IP ratings are only Cumulative to IP65. IP66, IP67 and IP68 are all separate and this is why you will quite often see manufacturer marking their equipment with all three.
        For example, 1m immersion for IP67 will only exert a pressure of 10kPa, however IP66 requires 100kPA pressure, an order of magnitude higher. Equipment rated for IP67 only could therefore easily fail a test for IP66 or IP65.

  11. What is the maximum defined pressure and time for IP 67?

  12. rajaram Kharat says:

    I am very cleared after its reading has to be very useful and short and clear!!!!

  13. Ash says:

    Can you please advice which is better, IP67 or IP68? what the difference when you are buying a waterproof TV for your bathroom for example? thanks

    • mm Blair Haas says:

      IP 68 is better than IP67. The test for IP68 is submersion in water for an extended time period, while IP67 is for between 30 and 60 minutes depending on the tester. I do not know how this works for a waterproof tv and where you plan to use it

  14. NK says:

    Hello Blair,
    Thanks so much for sharing this great info on IP ratings. A couple of questions.
    1. Would a device require testing for IP66 and IP67 if it is being sold in the US? these ratings are covered under EN60950-22 for outdoor requirements.
    2. If the enclosure has been tested for IP66 and IP67. would we still need more tests on the final product?

    • mm Blair Haas says:

      Keep in mind that the enclosure is tested without any access holes or slots. So there are several options:
      1. If you have insured that your enclosure as modified is IP 66 or 67, then you can say it is designed to meet those ratings
      2. You have to be cautious about the types of connectors or readouts or whatever that you are using with this product to insure they meet those standards
      3. Our products are tested by UL. If you want to assert that they meet tested standards, than you have to retest but the enclosure already being tested and certified makes that process less costly and easier.

      • Shafeeq says:

        I am Shafeeq, from Qatar. Working as Product manager for ICT System Integrator. I have a requirement for IP67 rated Enclosure – 600mm width X 600mm Height X 400 mm Depth. Initially 40 Pcs, and will reach to 200. Can you suggest a manufacturer US / Europe origin. ?
        send me the details to Shafeeq.rcdd

      • Cole says:

        Hi Blair, not sure if you are still checking this old post but I’m interested in clarification on the above point. If a certified IP67 enclosure is modified, for example to mount a button to the cover, and the button itself has a gasket and is independently tested and validated to IP67, does that mean the end-product (combination of enclosure and button) can claim a certified IP67 without retesting? Or is retesting required in any case where the enclosure is modified, but we would at least be confident in passing that testing if all sub-components have been individually tested? Thanks

        • mm Blair Haas says:

          Hi Cole. Here is the deal. To claim it is “tested” to meet that standard, or that it is TUV or UL approved, then it needs to be retested. On the flip side, you can claim that all components ensure that it meets the standards or similar verbiage. If you need to have it certified, then you should feel confident it will pass the test. I hope that helps. Thanks for checking in with us

  15. jason says:

    Thanks for this post, i was looking at getting IP66 / 68 seals for a diving project.

    Are there any other ratings i should look at for diving applications ? up to 30 meters but normally around 5 meters.

    • mm Blair Haas says:

      I don’t know of other ratings. Keep in mind that the test for IP68 requires that one exceeds the requirements for IP67 – so longer than either the 30 minute duration or deeper than 1 meter. However, you should verify with the manufacturer what their tests were and whether you might need additional testing to insure the protection you need. Due to the pressure and materials involved, 30 meters is very different than 5 or even 1.

  16. DMO says:

    It appears that that IP65 and IP66 differences are the nozzle size, pressure and duration. Can you compare these with the similar characteristics required for NEMA 4?

    • mm Blair Haas says:

      Here is the UL 508 NEMA test:

      8.6.1 The enclosure and its external mechanisms shall be subjected to a stream of water from a hose that has a 25mm inside diameter (1 inch) nozzle that delivers at least 240 L per minute (65 gallons). The water shall be directed at all joints from a distance of 10-12 feet. The nozzle shall be moved along each joint one time at a uniform nominal rate of 1/4 inch per second. A conduit may be installed to equalize internal and external pressures, but shall not serve as a drain. The enclosure shall be considered to have met the requirements if at the conclusion of the test, no water has entered the enclosure

  17. Nguyen Nga says:

    Short and sharp. Thank you very much for sharing.

  18. Alper says:

    Hello Blair,

    I have a device which should operate in very humid and salty environment. The device is not tested for salt fog but has IP rating of 54. I am planning to buy external enclosure which withstands salt fog and has IP 66 rating. Technically, is putting my device in this enclosure guarantees salt fog protection or do I have to get my device tested for salt fog?

    • mm Blair Haas says:

      I am sorry it has taken me so long to respond. The rating of the enclosure does not transfer to the completed product but should be helpful in passing later tests. Also, keep in mind that IP66 does not necessarily convey salt resistant. Good luck.

  19. According to BS EN 60529 (IP ratings) the test duration for IP65 is a minimum of 3 minutes (depending on product size – 1 min per square meter is the requirement). If you are referencing a different standard for this I would expand.

    There is also nothing in this standard that references pressure aside from a rather ambigous comment that states to adjust pressure to achieve delivery rate.

    If you are getting information from a different location then I would strongly recommend referencing it because as things stand for IP x5 you aren’t strictly correct as per the standard.

  20. Raj says:

    I have searched the internet, and was not able to find information on an IP65S rating. Can you tell me what the “S” in the represents, please?

  21. Mario garcia says:

    Hello, thank you for this interesting and useful review.
    One comment and your answer did reference to cold/humid environment (as freezers and big storage rooms) , your answer indicated that IP66 would work but is not the most suitable because of gaskets deterioration. Could you guide me to the appropriate certification for this cold/humid environment, a certification that covers water infiltration and cold/humid environment?
    Thank you.

  22. mehdi babaei says:

    Residential want to make use of sandwich panels with ip66 standard, please advise Which way we use and what material

  23. Chevy says:

    Hi Blair,

    Can you please provide us some test proof showing that IP67 & IP68 tests for waterjet propulsion pressure are better than IP65/IP66 since they only mention when submerged under water. Up to now, we still have no clue since we have not made tests. Thank you.

    • mm Blair Haas says:

      I do not have the facility to provide those tests. If you check the UL website, you can find details of their testing methods. The concept is that the pressure of 1 m or in the case of IP68, more than 1m is greater than the force of the spray. I hope that helps

    • Glenn says:

      That statement is incorrect, 1m of water is about 9.8kPa, the IP66 spec is for 100 kPa. This would be more analogous with 10m submersion as far as pressure. That said, a partial seal spray is likely less challenging for an enclosure than full submersion at the same pressure. Many products feature multiple ratings for that reason, e.g. IP66/67.

  24. Emir says:


    There is protection difference between IP65, IP66, IP67. So i want to ask what is this difference source ? About enclosure shape, material, type or Gasget type?

    Example: if we use an ip 66 enclosure’s gasget on ip65 enclosure. Can we enhance ip65 to ip66 only with this job?

    • mm Blair Haas says:

      You would still need to test, but yes, the gasket can have the impact of changing the rating. Bud has just changed the gasket on our AN series of die cast boxes, raising it from IP66 to IP68. Again, we had the units tested to verify. There can be other factors, not the least of which is the tightness of the seal. I hope that helps.

  25. Emir says:

    You have IP65 tablet enclosure products. How to maintain the IP65 rating after cut the enclosure for TFT Display Space?

    • mm Blair Haas says:

      If you make the cut in any NEMA/IP rated enclosure, then the hole that is cut must be sealed and tested. Therefore, if you are putting in a display, you need to be sure it is rated to the level you require and that there is appropriate gasketing around the display. It also must be tested.

  26. sunday adoga says:

    Excellent info on about ingress protection on 65, 66 and 67.

  27. Iman says:

    which is the best water resistance IP level ?

  28. Sorabh Mukhi says:

    If a system is IP67 protected, then does it mean that even outside air will not enter the system?

  29. Anbarasu says:

    hi… can you define for Servo motor on which condition IP67 is defined, as the Rotor is rotating part surely the water/liquid penetrates inside the motor, then how to perform the test. please suggest IP67 standards for rotating location and testing procedures

  30. MaC says:

    Hi Blair,

    I was looking for explanation regarding devices rated IP66&IP67 and I’ve found the answer in this thread.

    So I just wanted to thank you.

  31. Dave says:

    How does the rating apply to pressures lower than atmospheric pressure, like ascending into the atmosphere? Will this guarantee negative and positive pressure change or only pressure increases?

  32. Basavaraj says:

    Hi Blair,
    My query is regarding the IP67 testing.
    Do we have to test the product for IP67 when it is new, or do we have to test after subjecting the product for Reliability testing (Like Vibration, temperature cycle etc) ?

    • mm Blair Haas says:

      We do not get involved with vibration and other tests since those are based on your internal equipment. I suggest you work with your local resource for testing on this.

  33. Jon says:

    Hi Blair

    Can you tell me where the information is to say that the pressure created when carrying out the IP 67 test, is grater then that produced when carrying out the IP 66 test and therefore meaning that the IP 67 protection is greater than IP 66. My colleagues and I often have this debate a lot and can’t find concrete evidence. We still think that beacuse of the natures of the tests one is not a better type of protection, just a different type of test. Yes IP 61-66 are the same type of tests so to speak but 66 and 68 are different.

    • Jon says:

      If this was the case ie 67 being better than 66 why are a lot of enclosures subjected to both an IP 66 test and an IP 67 test. If the 67 is better like you say why would manufacturers waste money doing both tests and getting enclosures certified for both? It is my belief that just because an enclosure is subject to an IP 67 test it will not necessarily pass an IP 66 test.

      • mm Blair Haas says:

        It is typical that a company will test for IP65 or IP66 first before they test for IP67. Therefore, since they have slightly different meanings, they may show both ratings. While I am not an expert on the physics of the tests, typically, if the box can withstand the pressure of being under 1 meter of water for at least 30 minutes then it can withstand the spray tests. This is why the testing is typically done sequentially (IP66 then 67) because if it won’t pass IP66 it would not normally pass IP67. Further, the proper rating should be obtained based on the application. If one is dealing with submersion, then one would need to go up to at least IP67. I hope that helps answer your question.

  34. adeel says:

    Sir we are using CNC plasma and gas cutting machine with control panel rating IP65. in our area humidity sometime goes upto 70 to 80 percent.sand storms are often coming.heat index upto 52 degree.

    kindly explain this control panel with IP 65 is suitable for such conditions.waiting for your kind resposne.

    • mm Blair Haas says:

      If I understand your question – the control panel on the machine is rated IP65 and you are concerned about operating the machine in those temperatures. IP65 means that the controls would be dust tight, so it should withstand the sand storms. The rating also means that it can withstand a strong flow of water. However, there is no testing done for the temperature issues and its impact on the internal equipment. This is something that you should discuss with the equipment manufacturer.

  35. Bob Sanders says:

    Hey Blair,

    Your insight is quite useful. My question is related to the temperature difference between the camera unit itself ( inside the camera housing) versus the temperature outside. If the unit is internally 60 degrees Farenheit and outdoors in 40 or colder, will condensation form inside the case?

    Cheers Bob

    • mm Blair Haas says:

      Bob, I think it is possible for condensation to develop. The enclosure is protected from external water sources, but it cannot protect against internal water development. You might look into methods of protection under these conditions as the gasket will not stop this.

  36. T Ravi Shankar says:

    One of my machine cluster is IP 66 protected but still moisture enters in it in rainy seasons. Please let me know how to solve the same.

    • mm Blair Haas says:

      I am not sure of the source of the moisture. It is possible that the seal/gasket on the box lid or any openings for input/output have failed and need to be replaced. The other issue, raised in prior comments, is that moisture can occur with the internal components based on variations in temperature or humidity. The gaskets keep moisture out but cannot stop it from being created internally. I would suggest you discuss it with the manufacturer of the machine.

  37. Chad Haering says:

    This article only tells half the story. IN IP67, the 6 refers to sand and dust and the 7 refers to water egress. So where are the dust test methods?

    • mm Blair Haas says:

      Hi Chad. Thank you for your thoughtful response. I did not focus on the first digit test because the blog was focused on the differences between IP65, IP66, and IP67. Since they all of the same dust-proof rating of a 6, I felt it did not fit. However, there are rigorous tests done, typically with dust chamber and specific sizes of talcum powder grains. There also may be a vacuum line used to create the proper pressure levels. The 6 means that as the chamber is activated and the dust swirls through the chamber at the specified rate, there will be no ingress into the box. I hope that answers your question.

      • Leigh says:

        Hi Blair,
        I realise that in IPXY X is w.r.t. dust and Y is w.r.t. water but I have a problem with ingress of cement dust into a displacement transducer that is IP66 (cement dust can be much finer than standard 75um talc) and am wondering if an IP67 protection might give more dust protection as a ‘side effect’ of its extra resistance to water ingress?

  38. Tjom Hilll says:

    Can IP 65 be worn in the shower

  39. Jason Chen says:

    Hello Mr. Haas, thanks for your great information. I have a device are operating in a normally very high solty and humidity (90-100%) beach area, should the device with IP 67 or IP68?

    • mm Blair Haas says:

      Either should work for you. The key issue to worry about is corrosion. You either should be sure that you are using either powder coated die cast or fiberglass reinforced plastic to avoid this issue. Good luck

  40. Ed salas says:

    Kindly advise if an ip66 standards is a gas or explosion proof device for a flloodlamp fixture?

  41. Anil says:

    Is it advisible to use IP66 enclosures under ground in landscape area?

  42. Alfie says:

    How deep in meters can a ip66 speaker go?

  43. Nick says:

    I am working on a project where the vendor has submitted a part that is rated IP65; however, the vendor states:
    “UL does not recognize the existence of IP ratings in the UL508A standard. Therefore, any device without a specific Type rating based on the NEMA standard must be considered Type 1 even though it would provide the protection stated in the IP rating. For this reason, the panel would have to be listed as Type 1.”
    Does this statement sound plausible to you?

    • mm Blair Haas says:

      It is up to them how they want to specify their product. They are correct that IP is a different rating system than the NEMA standard although they are closely related. Many of our products have both ratings so you should readily be able to find a product that has a NEMA rating.

  44. Giovani says:

    Hello Blair Haas, I’m doing a job for school, and I would like to know an average cost of an IP67 or IP68 certification, average price per device.

    • mm Blair Haas says:

      I don’t know the cost of the certification process as it varies by the product size and level required. I suggest you contact your local certification source for a quote

  45. I have some outdoor cameras “SAMSUNG SDC-7340BNC” that are rated ip66. So the owners manual said these should be installed below a overhang. My house has no overhangs. Is it ok to install out in the open on the side of my house even tho the manufacturer said it should be below a overhang because its ip66 rated? Or should i make something to go over the cams to help protect them? Can you refer me to a good tiny overhang supplier? I ask because my old cameras of 3 years from different manufacturer also ip66 rated w/no overhang have gotten hazy and blurred over the years from weather exposure. Apparently it has rained more than 3 minutes if you know what i mean. Thanks in Advance.

    • mm Blair Haas says:

      I am not a photography or camera expert, but here are some thoughts. The testing for IP66 does not deal with the impacts of the sun and UV rays. I am guessing that may impact both the seal on your camera as will as potential degradation of the lens. The goal of the overhang is probably not to protect from rain/snow/sleet but to protect the unit from the sun. I do not have any resources for the overhang but I would think that if you can just install some sort of panel over it that would protect the camera and specifically the lens from the sun, you should be ok. I hope that helps

  46. taha amjad says:

    I got two questions
    1. If a sensor is rated for IP68 then does that mean that the sensor also full fills and exceeds the IP67 requirements?
    2. A sensor typically has a single IP rating associated with it
    but some time multiple IP rating are given like:
    IP67, IP68 and IP69K ingress rating
    what does that signifies?

    • mm Blair Haas says:

      I am not a sensor expert, but it might be helpful if you review the testing process. IP67 is a submersion test of up to 1 meter in depth for 30 minutes. IP68 is a deeper test and it is up to the manufacturer to specify the time frame. Based on my understanding, the only time that IP67 would not be assumed to be passed if it passes IP68 is if the test for IP68 was for less than 30 minutes. On your second question, IP67 and IP68 might both be listed in case the customer is looking for one or the other and assumes that they might not know the difference. IP69k is a totally different test dealing with high temperature spray so this says the product can be submerged as well as meet high temp high powered spray tests. I hope that helps

  47. Ganesh says:

    I have a basic question regarding the ingress protection, whether in an IP66 or IP67 certified product , is there any chance that air/moisture can enter inside the enclosure?

    • mm Blair Haas says:

      The purpose of the tests is to keep moisture out under the tested conditions. It should avoid any moisture inside the enclosure as long as it meets the required conditions.

  48. st says:

    Nice and interesting article. It is not really clear for me what’s the water resistance level of an Ip67 enclosure related to time exposition at water.
    An ip67 enclosure will respect the standard if it has a water intrusion after 1 hour of rain?
    What’s the relation between the standard and the test done for his verification?
    If an Ip67 is used exposed to rain there should be a water penetration afte hours of rain weather (because the standard is tested only for 30minutes)?
    Thank you

    • mm Blair Haas says:

      I believe you have misunderstood the IP67 rating. It is not for weather such as rain, but for submersion such as in a pond or fountain for at least 30 minutes. The rain tests are IP65 and IP66 which deal with heavily directed water.

      • st says:

        Thank you very much to take the time to read and reply. I do not misunderstood i just had bad experience with an Ip67 box in which there was water intrusion after a raining day and also after few ours putting it in a box with just 5 10 cm of waters (to simulate rain condition). When the manufacturer said that it is Ip67 compliant because it is tested for 30 min in 1Mt deep water i tried to better understand this categorization.
        Because an Ip67 can resist for 30 min at 1Mt deep water but it is only for 30 minutes. It is a totally different things to have water (small quantity) for long time.
        And i cannot find detailed information abut this online.
        Apparently Ip67 should support hardly condition that rainy days but standard said that it is tested in only for 30 minutes.
        Best regards,

        • mm Blair Haas says:

          Please keep in mind that IP67 is a test for underwater immersion but given the pressure of the water, it should also withstand any rain storm. My guess is that either the box did not actually meet the standard or was damaged somehow while you were installing your components. We have never had an issue with our IP67 boxes leaking when used out of doors in all types of environments

          • st says:

            Thank you.
            The problem is exactly about the IP67 test. From my experience i have seen that a box will resist 30 min at 1mt deep but will fail with 4 raining days.
            If there are weak points they will resist 30 min with pressure but will fail a longer period with water applied constantly. This is why i don’t understand why i can’t see anything in Ip67 standardization talking about the resistance for long timing. Every Ip67 box producers will just say that if the box resist for 30 Min (1mt deep) it satisfy the standard.
            This is my main doubt, why standard doesn’t say anything about the timing?

  49. Cris says:

    Does IP66 or IP67 can work on acidic areas? if YES, can you provide my further explanation document or link regarding that matter.
    Best regards!

  50. Oscar Gonzalez says:

    If I install led lights for my car exterior and they have ip65 ratings will rainfall mess them up?

  51. sam says:

    Can you give an average cost for getting a small enclosure 5″ x 3″ tested for a rating of IP65

  52. Valentin says:

    Thanks for the wonderful post very useful guide helped me a lot.

  53. This blog is a really great one. I am glad to have read this. This guide is really helpful for good house waterproofing.

  54. DIVIZE b.v. says:

    You done a great job about this category, I got the best and useful information and suggestions from this category. You made a good site and it’s very interesting one. Thanks for sharing the best information. Regards.

  55. ankita says:

    Thank you for such a nice information .i like this blog.

  56. Paulson says:

    Hi Blair,
    I would like to know whether there is any correlation with Humidity and IP Rating. For Example, could i come to the conclusion that if the Fixture is having IP 65, can it withstand humidity ranges from 65 to 70%?

    • mm Blair Haas says:

      These are totally different tests so there is no specific or certifiable correlation

      • Matthew N Klunis says:

        Blair sorry to chime in with an unassociated question, but honestly WHICH IP rating is BEST for outdoor RAIN Downpours??
        Thank you,

        • mm Blair Haas says:

          Hi Matthew

          This is a good question. Any IP rating that has a 3 or greater rating as the last digit should protect against heavy rain. You might also feel comfortable with a NEMA 3S or 3R rating which are designed for rain, snow or sleet protection.

          • Rasika Mallawarachchi says:

            Thank you very much. This is the answer most of the ordinary people need.

  57. Hung Hoang says:

    Thank you for sharing this information with us. I really like your blog. Very useful short and clear information!!!!

  58. Brett says:

    Hi Blair,
    If a device is hermetically sealed, does it still require IP testing or is that waived? Thanks!

  59. Richard Aven says:

    Well there are different types of enclosures some are waterproof and some are not well it depends upon your usage the best enclosure from my view and my use is NEMA 6P enclosure because it is safe enclosure which you can use in your home.

  60. Theo Kocian says:

    I shopping game camera’s and two that I’m considering hapIP ratings of 56 and 66. Can you explain the difference?


  61. LEE says:

    I have requested for a supplier to do an IP56 enclosure test on an AC Brake to be coupled to an AC Motor. I have been told that one of the test requirements is they have do the jet spray outdoor at an ambient temperature not below 18 Deg C. Any temperature below 18 Deg C they can’t do it. However, I am unable to find any article that focus on the importance of temperature for carrying out an IP56 test except focus on issues like the nozzles size, duration and distance when spraying.
    Would you be able to advise on this temperature requirement which is really one of the criteria ??
    Also, will you be able to advise which website I can read more details about IP enclosure test procedures.

    • mm Blair Haas says:

      I have done some research and there is one issue with temperature and that deals with insuring that the air temperature (and thus logically the internal temperature of the box) and the water temperature are within a similar range. The concern is that if the water temperature is significantly different you will create the potential for internal condensation. A different approach to this is to have some sort of proper venting in the box to equalize the temperature. Perhaps the lab does not have the capability to properly vent your equipment. I hope that helps

  62. Tushar Kapoor says:

    I have a question about the comparison between NEMA and IP standard, IP 66 is compatible with NEMA 4 and 4x, IP67 to NEMA 6 and IP68 to NEMA 6P enclosure.

    However, I am confused about IP67-NEMA 6 and IP68-NEMA 6P, the difference between 6 and 6P is just the material that provides corrosion resistance or not. For example, carbon steel is used to construct NEMA 6 means doesn’t provide corrosion resistance, on the other hand, NEMA 6P provides it(SSL, powder-coated Al). But IP67 and 68 are categorized by ingress protection which determined by how long and deep they can submerge under the water. Why don’t they be categorize to the same NEMA rating? such as Both IP 67, 68 to NEMA 6

    according to
    page 8/9

    • mm Blair Haas says:

      I understand your frustration that the NEMA and IP ratings are not easy to cross. They were developed by different bodies and meet slightly different needs. They can be close, but they are not interchangeable. Always verify what you need, don’t over-specify

  63. Mark Lee says:

    Good day sir Blair,

    May i ask, for example IP65, first number 6 which is protected from total dust ingress. how could you satisfy the client for testing?

    It is possible testing for this, put in a box a panel board and fully closed and inside their is a dust then put hose to inject air to circulate the air inside the box?

    Thank you.

    • mm Blair Haas says:

      Our boxes have been tested by the proper test facilities so we do not conduct the tests ourselves. You can advise the customer based on this as long as you have not altered the box.

  64. Shaun Meyer says:

    With regards to the testing specifications for an IP66 rating, it requires that water is projected in powerful jets (12.5 mm nozzle) against the enclosure from any direction and that this shall have no harmful effects. Would it be acceptable to test the enclosure with 4-off smaller nozzles (+-6 mm nozzles) from multiple directions but still achieving the specified pressure (100kPa) and 100 litres per minute onto the enclosure.

    Thank you

    • mm Blair Haas says:

      From our Engineering Director – It will be ok as a preliminary test prior to a formal test that should be done according to the IP /UL standard.
      We at BUD use an air pressure assisted jet spray to achieve the water force effect but using less water, again this is a good internal approach to get a Pass /fail sense of the enclosure.

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