Class 1 Div 2 Motor

Gave you a GA! Stupid question: (for the OP) Why have ratings if we are going to ask questions instead of going by the rating? -- JHF

https://www.baldor.com/mvc/DownloadCenter/Files/CA501

Class 1 Div2 implies you could have an explosive atmosphere under fault conditions - like a leak in what looks like a driven compressor in yr photo & inadequate ventilation to disperse it. THIS IS NOT AN "ORDINARY LOCATION".

It is just possible the motor & coupling housing are pressurised with "gas-free" air & an approved pressure monitor/shutdown system.

But, according to memory, "non-sparking" includes not having hazards like a light alloy fan and a steel shroud around it - which can spark by mechanical contact.

As already mentioned, NO!

The appropriate motor must be used and the one you have DOES NOT COMPLY!

By trying to save a penny you could KILL PEOPLE, as in make them PERMANENTLY DEAD!

It might be allowed by code, and might be ok'd by the AHJ...but it's not a good idea....

..."

Re: Class 1, Division 2, Group B

Yes, you can install a TEFC motor in a 1-2-B electrical classification, providing there are no arcing devices. The one thing that you will need to be concerned with is temperature. As you are aware the motors today run hotter than the old days, due to the reduction of iron in the stator.
What you need to know is the AIT, (Auto-Ignition Temperature)of the chemical that you are dealing with, and then you cannot have any item have a surface temperature greater than 80 % of the AIT of the chemical that you have in the classified area.
You mention a TEFC motor, you can actually install a open type motor in a Class 1, Division 2 area, provided that their are no arcing devices. I am totally against installing an open type motor in a classified area, and I would not do it, but the code will allow it."...

http://forums.mikeholt.com/showthread.php?t=64641

Like you say, there's a big difference between allowing something versus recommending something.

I also found motor with the same mark "Recognized Component Electric Motor For Ordinary Locations", but in the motor enclosure also have nameplate indicate the motor suitable to be used in class 1 div 2 GR CD T3. in the nameplate indicate reliance electric 841XL. What is the type of protection for this motor? is it Ex-na?

Why isn't the original equipment manufacturer dealing with these concerns over the telephone?

I suspect protection type is Ex(p), IEC code - that is pressurised, it might be N - non-sparking, but I have seen that only when motor is outdoor, outside hazard area driving purge duct fan & yr first photo seems to drive adjacent compressor. Is the "green snake" in photo a pipe or cable?

It is a practical way of converting a standard TEFC motor to Ex. The complication is in having pressurised clean air - no problem in a plant using lots of pneumatics - and a certified fail-safe scavenge air pressure & flow monitor which stops the motor for any air fault. Also motor has to have bearing seals which do not mind Δp - not a problem to a maker who has experience with hose proof/ship deck/flooded motors. And some requirements like not having a magnesium alloy casing which sparks if you drop a steel hammer onto it or a fan housing which could contact the fan.

As has been commented, motor would be part of a UL or equivalent certified assembly with nominated critical components and approved drawings - Reliance probably safeguarded themselves by labelling motor "ordinary locations" to avoid users thinking "magic is in motor".

the "green snake" is grounding cable from structure to motor enclosure.

In other plan that use IEC std, we have ABB motor and its clearly mentioned the Ex protection is Ex-de.

but for the facility that using ANSI std it's not clearly mentioned the Ex protection, only statement classified for Class 1 Div 2 area.

Ex-de would be combination of d -flameproof (which is an enclosure with such narrow gaps & wide flanges that no flame will exit if you ignite flammable gas inside enclosure) and e - increased safety, which has such low temperature rise, insulation thickness & clearances it will never spark - probably the terminal box in this case. Ex(e) was much a German technique e.g. flameproof Ex(d) switch in Ex(e) panel: but in some cases, low ignition temperature risk, it is most economic.

Reliance was bought by Baldor and Baldor was bought by ABB.

ABB still carries some of the Reliance brand and frames.

I recommend contacting ABB / Baldor for your questions.

<...recommend contacting ABB / Baldor...> Absolutely. This guidance was available to Anonymous Poster #1 at #2⇑.

Slam-dunk.

The phone numbers are all in the public domain.

<unsubscribes>

Here in the u.s. , we have a store, harbor freight, many of the products they sell have a very similar nameplate. Most of these items fall into one of two categories. A. When it finally wears out, you throw it out in the trash. B. If it breaks, you throw it out in the trash and buy a replacement.