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Relation Between IP Rating and Ex Rating

11/01/2020 1:28 AM

Dear Gents,

kindly need your support as we need to know is any relation between IP (ingress protection) rating and Ex (explosion proof) rating, and if the equipment in installed in Hazardous area, and there was no mention in nameplate about Ex, only mention IP rating, can we consider this IP number as hazardous classification, please advise

Thanks

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#1

Re: Relation between IP rating and Ex rating

11/01/2020 1:55 AM

No.

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#2

Re: Relation between IP rating and Ex rating

11/01/2020 1:39 AM

Ex & Degrees of Protection (IP) According to IEC 60529

Ex & degrees of Protection (IP) according to IEC 60529 in comparison to NEMA Enclosure-Types.

A system for classifying the degrees of protection provided by the enclosures of Electrical Equipment

Definition of protection includes:

  • 1. Protection of persons against access to hazardous parts of equipment inside the enclosures.
  • 2. Protection of the equipment installed inside the enclosures, against the access (ingress) of foreign SOLID objects
  • 3. Protection of the equipment installed inside the enclosures, against the access and the resulting harmful effects of ingress of water.

The overall object of this system is to promote uniformity in methods of describing the protection provided by the enclosures through a structured CODE, known as IP CODE or IP INDEX, which is documented and implemented through a series of tests.

The details of the protection associated with FIRST CHARACTERISTIC Numeral

The details of the protection from WATER associated with SECOND CHARACTERISTIC Numeral

Added in the IEC60529-2013 edition

....click on link to continue explanations...

https://expeltec.com/2013/07/17/ex-degrees-of-protection-ip-according-to-iec-60529/

Yeah, you're talking about two different animals....

https://en.wikipedia.org/wiki/Electrical_equipment_in_hazardous_areas

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#3

Re: Relation Between IP Rating and Ex Rating

11/01/2020 11:08 AM

No, there isn't. It is perfectly possible to have IP68 equipment that is not certified for use in a hazardous area.

<...advise...>

Please stop, and receive training, along with the rest of <...we...>. Hazardous area electrical is not for the untrained.

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#4

Re: Relation Between IP Rating and Ex Rating

11/01/2020 1:43 PM

No, simply put they are completely different levels of protection (although they are related). If the equipment is installed in the hazardous zone it MUST be certified and marked as such (ATEX, IECEx, etc). Period.

If you have non-certified electrical equipment (or electrical equipment not protected using intrinsic safety techniques (where applicable)) in a hazardous area STOP!! Shut down the equipment in the Zone and replace the equipment before an explosion occurs.

Consult your applicable local hazardous area standards and/or talk to a local hazardous area inspector for guidence.

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#6
In reply to #4

Re: Relation Between IP Rating and Ex Rating

11/02/2020 2:41 AM

<...If the equipment is installed in the hazardous zone it MUST be certified...>

Ex ia and ib allows for "simple apparatus" in the hazardous area, and one can install bare wires in zone 0 under Ex ia.

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#7
In reply to #6

Re: Relation Between IP Rating and Ex Rating

11/02/2020 4:31 AM

...which would be IP00.

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#10
In reply to #6

Re: Relation Between IP Rating and Ex Rating

11/02/2020 1:28 PM

Yes, see second paragraph I posted which I noted possible exception examples.

I was not going to try and explain everything in depth because, like a twitter response a quick post on a forum is no substitute for reading and understanding the applicable standards as they relate to a specific situation.

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#5

Re: Relation Between IP Rating and Ex Rating

11/01/2020 2:07 PM

A skydiver whose parachute has failed,on the way down, met a man on the way up.

"Hey!Do you know anything about parachutes?" "

No!Do you know anything about EX rated enclosures?"

What ever you are trying to do,STOP NOW!

A little knowledge is VERY DANGEROUS!

'Nuff said.

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#8

Re: Relation Between IP Rating and Ex Rating

11/02/2020 5:12 AM

EX rating refers to the ability of the enclosure to prevent an internal explosion from igniting an explosive atmosphere external to the enclosure by means of cooling the explosion products below the ignition temperature of the external atmosphere should they escape. There is training on this side of the pond and many examinations before you can be certified to install EX equipment. Every item used in the installation must have been tested and carry the EX approval number and EX rating.

Being Ex designated does not mean it has an IP rating. It is not uncommon to find moisture in an EX rated enclosure.

IP rating is just a designation to determine how well the enclosure keeps foreign bodies from entering the enclosure.

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#9
In reply to #8

Re: Relation Between IP Rating and Ex Rating

11/02/2020 6:01 AM

<...EX rating refers to the ability of the enclosure to prevent an internal explosion from igniting an explosive atmosphere external to the enclosure by means of cooling the explosion products below the ignition temperature of the external atmosphere should they escape....>

Er, um, that's only Ex 'd'. One can get Ex 'e' enclosures as well, which don't do that, and a combination of the two in terms of indicators and push button stations. One can also do Ex 'p' for enclosures, and Ex 'o' and Ex 'q' techniques also have their applications.

The forum is highlighting the need for the original poster to receive training.

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#11
In reply to #9

Re: Relation Between IP Rating and Ex Rating

11/03/2020 5:33 AM

True, I just didn't go into the intracity of Class I or Class II, with all their sub zones 0, 1, 2, 20, 21, 22 and ignition temperatures and classifications.

As you say the if original Poster wants to delve more into the Hazardous Area Selection Criteria then this link may help oir maybe not.

https://www.frsa.com.au/FRSA/media/Media-Library/Documents/W-08-08-0181-Eflare-AT293-datasheet6_Eflare-Hazard-Chart.pdf

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#12

Re: Relation Between IP Rating and Ex Rating

11/29/2020 12:46 AM

NO.IP rating is common for all classes of motors.EX d Ex E Ex n are all different types of enclosure for use in Hazardous areas with different classifications and need to be marked upon Name plate.Further manufacturer has to comply with additional data provision on name plate if local regulations require which vary from country to country and state to state in some countries

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#13

Re: Relation Between IP Rating and Ex Rating

12/03/2020 5:28 AM

Seems as though this has been pretty much nailed.

Both IP and Ex are levels of protection against stuff getting inside.

All equipment must have been certified by the manufacturer.

IP is ingress protection against solids and liquids. There is a 3rd figure to do with impact. Can you push your finger into it, will dust get into it, will the rain get into it, can I hose it down. The minimum IP rating for Ex equipment is IP54.

ATEX and Ex is do with preventing ignition and there are a myriad of ways of achieving this. Exe, Exd, Exp, I.S - the list goes on. The area where the equipment is to be installed would also have been assessed to determine the risk of a leak and exactly what gas could be released. Different amounts of energy required to ignite hydrogen compared to methane.

Your question suggests you do not have an understanding of ATEX or Ex principles. It is a huge topic.

Absolutely time to stop and take advice from a qualified person.

IP rated equipment is not suitable for use in a hazardous area.

Suitable rated Ex rated equipment happens to be IP54 minimum but must be specified, selected , maintained and tested in accordance with ATEX (BS 60079-17)

With a question like this you may also want to google (other search engines available) SIL ratings. There's another minefield for you.

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