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Hi Eng's, I could need your help

Hi Eng's, I could need your help

Hi Eng's, I could need your help

(OP)
Hi Eng's,

I could need your help with finding standards/regulations about the classification of hazardous areas (WWTP, Sewers, Pumpstations etc.) in Canada and US - if there are differences. Just need to know which class/div applies to which area. Thanks!

RE: Hi Eng's, I could need your help

I am assuming that you are talkking about electrical hazardous locations.  Detailed information can be found in NFPA Section 70, also know as The National Electric Code. Look at paragraphes 500-503 & 505.

www.nfpa.org

The following are examples the hazardous locations.


CLASS I
(Gases and Vapors)
(examples)    NEC 500-503        NEC 505
Acetylene         Group A         IIC
Hydrogen         Group B         IIC or IIB+H2
Ethylene         Group C         IIB
Propane        Group D        IIA


CLASS II
(Dusts)
(examples)         NEC 505-503
Metal dust         Group E
Coal dust         Group F
Grain dust        Group G


CLASS III
(Fibers & Flyings)
(examples)             NEC 505-503
Wood,paper or
cotton processing.    No sub-groups

  


RE: Hi Eng's, I could need your help

See "NFPA 820,Standard for  Fire Protection in Wastewater Treatment and Collection Facilities".

RE: Hi Eng's, I could need your help

Check the OSHA regs. for other hazard areas. You also have to consider confined spaces as hazardous.

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