IEC 60079 Hazardous Area Zone Classifications
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 …
Arc-Flash Hazard Warning according to Philippine Electrical Code 2017 Edition
Required Protective Clothing The Philippine Electrical Code 2017 Edition requires switchboards, panelboards, motor control centers, and other equipment in locations other than dwelling units to be individually field marked with …
IEC 62305 – Protection against lightning
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 …
Lightning Protection – Rolling Sphere Method Accordning to Philippine Electrical Code 2017 Edition
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 …
Non-electrical Methods of Partial Discharge (PD) Detection
Partial discharge is defined as the localized electrical discharge that only partially bridges the insulation between conductors and which can or can not occur adjacent to a conductor. Partial discharge …
ANSI/IEEE vs IEC Short Circuit Calculations Methodology
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, …