Hazardous Classification How to tell

[codequestion]

Is the following materials Class I, Class II or Class III Division I or II per NEC 2014 Article 500?

- Paraloid B-72 Lacquer – 12.5 fluid ounces
- Paraloid B-67 in Naphtha – 5 fluid ounces
- Acetone – 32 fluid ounces
- “P.B. Blaster”
Penetrating Catalyst -- 11 ounce can

 

[user 100]

Is the following materials Class I, Class II or Class III Division I or II per NEC 2014 Article 500?

- Paraloid B-72 Lacquer – 12.5 fluid ounces
- Paraloid B-67 in Naphtha – 5 fluid ounces
- Acetone – 32 fluid ounces
- “P.B. Blaster”
Penetrating Catalyst -- 11 ounce can

I don't do any sort of chemical facilities, but I do read these other parts of the forum from time to time, and you are going to need to be more specific about the operation you are talking about in order to get a more precise answer.

If these chemicals are only being stored .....In one older thread, I seem to recall one of the mods (either rbalex or don_resqcapt19) had mentoned that as a very general rule storage may not require classification, but that the op still needed to consult NFPA 30.


Again, you need to give more depth about what is going on.

 

[codequestion]

I don't do any sort of chemical facilities, but I do read these other parts of the forum from time to time, and you are going to need to be more specific about the operation you are talking about in order to get a more precise answer.

If these chemicals are only being stored .....In one older thread, I seem to recall one of the mods (either rbalex or don_resqcapt19) had mentoned that as a very general rule storage may not require classification, but that the op still needed to consult NFPA 30.


Again, you need to give more depth about what is going on.

Above chemicals are stored in fire cabinet in Archaeological room. They are going to have hood/exhaust system in which they are doing work.

I am going to install electrical lights, hood and receptacle in that room.

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[petersonra]

I would suggest this. It is not up to the installing electrician to classify anything. Someone with the proper experience and/or training is responsible for that decision and properly documenting that decision. The electrician is responsible for the installation according to the requirements of the area classification, but not the actual classification decision.

 

[codequestion]

I would suggest this. It is not up to the installing electrician to classify anything. Someone with the proper experience and/or training is responsible for that decision and properly documenting that decision. The electrician is responsible for the installation according to the requirements of the area classification, but not the actual classification decision.

I am not electrician. By installation I should say I am reviewing and designing producing electrical drawings.

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[petersonra]

I am not electrician. By installation I should say I am reviewing and designing producing electrical drawings.

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I don't mean this to be offensive but it seems to me that if you are qualified to determine the area classification you would not need to ask semi-anonymous people on the Internet about it. If you are not qualified, you should seek qualified assistance. That could include asking anonymous people on the Internet, or reading a book on the subject.

It might be that the manufacturer of the hood has information that could be helpful.

 

[codequestion]

I don't mean this to be offensive but it seems to me that if you are qualified to determine the area classification you would not need to ask semi-anonymous people on the Internet about it. If you are not qualified, you should seek qualified assistance. That could include asking anonymous people on the Internet, or reading a book on the subject.

It might be that the manufacturer of the hood has information that could be helpful.

You cant ask electrical designer to determine chemical combustible, flammable or to determine class division.
Ofcourse electrical is not quailified I am asking for peoples opinion based on codes.

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[AKElectrician]

Is the following materials Class I, Class II or Class III Division I or II per NEC 2014 Article 500?

- Paraloid B-72 Lacquer – 12.5 fluid ounces
- Paraloid B-67 in Naphtha – 5 fluid ounces
- Acetone – 32 fluid ounces
- “P.B. Blaster”
Penetrating Catalyst -- 11 ounce can

500.5 Read the three pages associated with it. Hopefully that clears it up for you.

I am going out on a limb here and saying that these need to be placed in a flammable container by other governing rules than NEC, where the hood installed on top of the specific cabinet needs to follow manufacturers instructions. (NEC requirement if its a electrical vent not a wind powered vent.)

 

[rbalex]

You cant ask electrical designer to determine chemical combustible, flammable or to determine class division.
Ofcourse electrical is not quailified I am asking for peoples opinion based on codes.

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So why are you asking us and why do you keep getting involved with projects you're not qualified to do?

 

[GoldDigger]

So why are you asking us and why do you keep getting involved with projects you're not qualified to do?

:thumbsup::thumbsup:

 

[codequestion]

So why are you asking us and why do you keep getting involved with projects you're not qualified to do?

I get proects because i am good at electrical but electrical overlap with other discplines.

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[rbalex]

I get proects because i am good at electrical but electrical overlap with other discplines.

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OK, but why are you asking those of us "electrical" that aren't qualified? Some of your other questions have indicated you aren't particularly "...good at electrical..." either.

 

[codequestion]

OK, but why are you asking those of us "electrical" that aren't qualified? Some of your other questions have indicated you aren't particularly "...good at electrical..." either.

If you arent quailfies then dont answer and please dont insult share your knowledge.

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[jumper]

You cant ask electrical designer to determine chemical combustible, flammable or to determine class division.
Ofcourse electrical is not quailified I am asking for peoples opinion based on codes.

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The electrical designer/consulting EE is the person who uses the parameters in article 500 to classify the area.

The NEC does not classify areas. The NEC tells us what to do after that person has determined the classification.

 

[gadfly56]

The electrical designer/consulting EE is the person who uses the parameters in article 500 to classify the area.

The NEC does not classify areas. The NEC tells us what to do after that person has determined the classification.

Exactly. More typically, there should be a project architect who is responsible for determining the room's use and design characteristics (eg, need a firewall? 1 hour, 2 hour? etc).

 

[jumper]

Exactly. More typically, there should be a project architect who is responsible for determining the room's use and design characteristics (eg, need a firewall? 1 hour, 2 hour? etc).

Yep. He/she tells me the classification and I wire it according to the applicable code articles.

 

[codequestion]

Yep. He/she tells me the classification and I wire it according to the applicable code articles.

Not really. I read the code if their is something i missed. Not all the time i do what is being said on here. Anywaus i got my answer on this one.
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[rbalex]

Exactly. More typically, there should be a project architect who is responsible for determining the room's use and design characteristics (eg, need a firewall? 1 hour, 2 hour? etc).

Nine times out of ten, it will be an electrical engineer or designer that determines the electrical area classification of a location. NEC CMP14, the NFPA TC on Electrical Equipment in Chemical Atmospheres(NFPA 496,497,499), API Subcommittee on Electrical Equipment (API RP500, 505) are almost exclusively “electrical” people. A project architect or other design professional will usually determine the occupancy Class.

With regard to the OP, knowing the materials determines the Class, Group and T-Code, but not the Division. Division is determined by a knowledgeable understanding of the process and it’s associated activities. A gualified “electrical” engineer or designer can determine the electrical area classification.

 

[AKElectrician]

I have a lot more flammable material's in my single car garage, so do lots of others. I'd be willing to bet some people have all three classes in some single car garages. Gun powder, gas, painting supplies, wood dust, animal feed, welding bottles.... Forgot to add most also have the boiler in there also (ignition source)

 

[rbalex]

I have a lot more flammable material's in my single car garage, so do lots of others. I'd be willing to bet some people have all three classes in some single car garages. Gun powder, gas, painting supplies, wood dust, animal feed, welding bottles.... Forgot to add most also have the boiler in there also (ignition source)

Possibly, but see Section 500.1 IN No.1.