I have a fire marshal classifying a cabinet woodworking shop as a class 2 Div 1 location. All of the equipment has a dust removal system connected to them. Is sawdust the dust they refer to in class 2. Is the fire marshals classification correct or is a wood working shop a hazardous location at all. Or is it class 3. What are some publications that would help me classify this location.
Hazerdous locations
- Thread starter stpage
- Start date
- Status
Re: Hazerdous locations
Well under 500.6 (B)3 Class 2 group classifications. Group G is defined as "atmospheres containing combustible dusts not included in Groups E or F, including flour, grain,WOOD..." Reading 500.5 classification of locations, seems to me that this location would be a class 2 if's it divison 1 or 2 I guess would fall into the ahjs' hands. I'm leaning more towards divison 1 because of 500.5(C)1(2).
Equipment installed in these areas would be under 500.7 (B) Dust Igniton proof.
Well under 500.6 (B)3 Class 2 group classifications. Group G is defined as "atmospheres containing combustible dusts not included in Groups E or F, including flour, grain,WOOD..." Reading 500.5 classification of locations, seems to me that this location would be a class 2 if's it divison 1 or 2 I guess would fall into the ahjs' hands. I'm leaning more towards divison 1 because of 500.5(C)1(2).
Equipment installed in these areas would be under 500.7 (B) Dust Igniton proof.
- Location
- Mission Viejo, CA
- Occupation
- Professional Electrical Engineer
Re: Hazerdous locations
The essential quality is that it be "combustible dusts... of wood." NFPA 499 , the "Recommended Practice for the Classification of Combustible Dusts..." does not classify simple sawdust as a Class II material, especially under the housekeeping conditions described.
Note: The numerical designator for "Hazardous (Classified)" locations is an upper-case Roman numeral; i.e., Class I, II, or III.
The essential quality is that it be "combustible dusts... of wood." NFPA 499 , the "Recommended Practice for the Classification of Combustible Dusts..." does not classify simple sawdust as a Class II material, especially under the housekeeping conditions described.
Note: The numerical designator for "Hazardous (Classified)" locations is an upper-case Roman numeral; i.e., Class I, II, or III.
fbhwt
Electrical Systems Inspector
- Location
- Spotsylvania,Virginia
- Occupation
- Electrical Systems Inspector
Re: Hazerdous locations
I just received a copy of the 2002 Cooper Crouse-Hinds Code Digest which covers article 500-516 of the National Electrical Code with product recommendations for use in hazardous(classified)areas.They also included a CD of the same.
I just received a copy of the 2002 Cooper Crouse-Hinds Code Digest which covers article 500-516 of the National Electrical Code with product recommendations for use in hazardous(classified)areas.They also included a CD of the same.
- Status