This document “A Brief Comparison of NEMA 250—Enclosures for Electrical Equipment (1000 Volts Maximum) and IEC 60529—Degrees of Protection Provided by Enclosures (IP Code) is a NEMA Standards Publication. In …
This paper presents the criteria in the selection and coordination of motor control centers (MCCs) components to comply with the requirements for motor service continuity in the most of industrial …
Hazardous area is defined in IEC 60079 as an area in which an explosive gas atmosphere is present, or may be expected to be present, in sufficient quantities to require …
Lightning is a very high-energy phenomenon. Lightning protection is oftentimes taken for granted as the probability of a lightning strike to a structure is low, and damage to properties and …
Rolling Sphere Method The Rolling Sphere Method is a popular and acceptable method of implementing lighting protection on structures. In the Philippine Electrical Code, the rolling sphere method is mentioned …
The differences between IEC methodology and ANSI/IEEE methodology in calculating short-circuit currents are: 1. DC Decay Component. ANSI/IEEE requires the calculation of a single Thevenin equivalent fault point X/R ratio, …