Cable Shield and Outer Sheath Grounding (Earthing)
Cable shields and the metallic sheaths or armors need to be solidly grounded on at least one point in order to operate at or near ground potential at all times. …
Arc Flash Equipment Labeling Requirement
Equipment labeling requirement for arc-flash were initially introduced in NEC 2002 and later in NFPA 70E 2009.Since then, it has become a norm not only in North America but in …
Which Standard Prevails?
I have been involved in many projects wherein specifications and datasheets are required to comply with the local standards. Most of the time, this will create issues during the procurement …
Estimation of Plant Electrical Load – Part 3
Note: This is the third part of a series of articles in the estimation of pant electrical loads. Check these for Part 1 and Part 2 In Part 2, a …
Explosive Atmospheres – ANSI/ISA/UL/NFPA/EIC
In late 2009, the International Society of Automation (ISA) and Underwriters Laboratories Incorporated (UL) jointly issued ANSI/ISA 60079-0 Explosive atmospheres – Part 0: Equipment – General Requirements which is a …
Equipment Protection Level
In the selection of electrical equipment for Oil & Gas industry application, particularly those inside classified hazardous areas, the equipment protection level is necessary as a criterion. Equipment Protection Level …