
CHAPTER 9
Electrical Hazardous (Classified) Area
Design and Safe Work Practices
The National Electrical Code
(NEC
), NFPA 70
establishes the requirements for electrical
installations in areas that are ‘‘classified as hazardous locations due to materials handled,
processed, or stored’’ [1]. It does not classify any areas involved with the manufacture,
handling, storage, transportation, or use of explosive materials. Explosive materials would
consist of blasting powder, dynamite, ammunition, etc. Standards involving those materials
can be found in NFPA 495, Explosive Materials Code.
Hazardous (classified) locations are defined by two separate methods: Division ...