Asynchronous (Induction) Motor Data – IEC 60909
Design engineers most of the time will refer to induction motor manufacturer’s data as an input to their design. This practice is totally acceptable. In the absence of a manufacturer’s …
Circuit Breaker Utilization Categories (IEC 60947-2)
Utilization category (for a switching device or a fuse) is defined in IEC 60947-1 as the combination of specified requirements related to the conditions in which the switching device or …
The Need for Power System Fault Analysis
Short-circuit analysis is carried out in electrical power systems to ensure that the selected electrical equipment and the installation as a whole is safe for workers as well as the …
IEC 62262 – IK Codes – Impact Protection for Electrical Enclosures
IEC 60529 – Degrees of protection provided by enclosures (IP Code) describes a system for classifying the degrees of protection provided by the enclosures of electrical equipment. The protection provided …
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 …