Are ExnA Type Motors Waterproof?

Doesn't anybody know how to Google?

Hazardous Areas Motors - Weg

Define: waterproof. Waterproof according to what? NEMA? EN / IEC 60034-5?

What does your motor vendor say?

If a gas can't get in, how will water?

Dear lyn,

there is a powerful tool - Google, I have searched, but there were too many information about this type of motors, could not find proper answer to my question, also I am not an electrical specialist.

Anyway, thanks for your answer, as a waterproof I have meant that if there is any damage for running motors from fire extinguishing system(sprinkler or drencher).

all kidding aside I know English isn't your 1st language but if you ask your question a little more clearly and completely maybe someone can offer you information you can use. "running motors off of a sprinkler system" doesn't make sense to me, sorry

And did you pose this question to whomever "informed" you in the first place?

I don't know if you can specify a "washdown" grade motor for hazardous applications, and I would never attempt to specify a motor without knowing if it is capable of performing according to the applicable specifications. That would be unethical.

What's your excuse?

Why don't you ask your motor supplier to do your job for you?

I'm fed up with incompetent people coming here for free advice, while being paid by someone who assumes that they are competent to do the work!!!!!

Where are your ethics?

From Lyn's source:

The Ex nA motor enclosure is built identically to a safe TEFC motor.

This may not be as fully water resistant as a "washdown" motor, but may suffice for your application. Please consult local electrical code officials.

Non-electrical-specialists should not be designing, specifying, acquiring, installing, testing or maintaining hazardous area electrical equipment without having first received appropriate training for the task.

So stop work. Either delegate the task to someone who is a specialist, or attend a training course without delay.

one sure way to find out...fill a bathtub with water, jump in lower the motor in the water and turn it on......please report back with your results

Good Day, sirs!

I would like to ask a question regarding to the type of motors. Recently, I was informed that according to IEC 60079-14, ExnA type motors can be used Zone 2 area according to Hazardous area classification. My concern is what would be if we use this kind of motors in Zone 2 area and are they waterproof? Any additional information regarding to this type of motor is welcomed.

Thanks in advance

Hazardous Areas Motors - Weg
Who did your work last week?

Waterproof is not enough as specification. Need atmosphere, bar, psi numbers or depth.

Also a motor that performs well in Ex zone has not always the correct materials to be submerged in water, especially salt water.

As Lynn says, it will work in water, just do not know for how long.

So is the EX version, unless it is a nitrogen fed casing.

For water proofing motor you will need IP55 protection for motor. Along with Hazardous protection.IP55 protection is for hose proof motors.

Thank you for posting this question, It is an interesting one

To answer the question..Unnecessarily

Waterproofing ( Rain, water jet, sprinkler system etc.) should be verified by motor nameplate data, factory inspection and testing report and certification i.e looking at IP degree or Nema enclosure type