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PCRH

Hazardous Location Definitions

Hazardous (Classified) Locations are defined in the US National Electric Code (NEC), Articles 500-505, and in other international standards such as the IEC, and describe the requirements of electrical products used in these locations. Decisions on the classification of a particular site depend on several factors, including:

Tags: 
Insulated Joint Protection
Airport Fueling Systems
AC Mitigation
Decoupling Electric Equipment
PCRH
OVP
Hazardous Locations

Determining AC Fault Current

AC fault current available from an electrical source can follow unintended paths back to the source, affecting cathodically protected structures. A solid, metallic connection between the faulting source and the cathodically protected structure can result in heavy current flow, but even an isolated pipeline or structure can pick up moderate currents flowing in the soil. This latter case is an example of a pipeline in a common corridor with a power line.

Tags: 
Insulated Joint Protection
AC Mitigation
Decoupling Electric Equipment
Decoupling Power Company Grounds
Marine Galvanic Isolation
Stray Voltage Mitigation
Decoupling Power Cable Sheaths
PCR
OVP
OVP2
PCRH
SSD
ISP
VTNI
Alternating Current

Hazardous Locations

Many user sites are formally classified as hazardous locations, according to various standards. Other sites may commonly have explosive vapors or gases present, but haven't been identified as a "hazardous location" due to unfamiliarity with the classification requirements.

Tags: 
Insulated Joint Protection
Airport Fueling Systems
AC Mitigation
Decoupling Electric Equipment
PCRH
OVP
Hazardous Locations