Use of ATEX Certified Equipment
In July 2006, the European Union issued a directive to all manufacturers and users of equipment in hazardous areas called the ATEX Directive. The aim of directive is to allow …
What is the difference between a metalclad switchgear from metal-enclosed switchgear?
I. Introduction Metalclad switchgear and metal-enclosed switchgear are terms used to describe types of switchgear constructions, primarily in the realm of medium voltage (MV) systems. While they are often used …
IEC 60865 Short-circuit currents – Calculation of effects
What is IEC 60865? IEC 60865 pertains to standards set by the International Electrotechnical Commission (IEC) that address the effects of short-circuit currents in three-phase a.c. systems. The purpose of …
Arc-flash – hazards, mitigations and standards
What is Arc-Flash? Arc-Flash is a type of electrical explosion that occurs when an electrical current leaves its intended path and travels through the air from one conductor to another …
Use of Single-Pole Circuit Breaker as Overcurrent Device – Philippine Electrical Code 2009
Article 2.10.1.5 (B) – Multipole Common Trip Circuit Breaker Required Philippine Electrical Code 2009 Article 2.10.1.5 Identification for Branch Circuits Section (B) Disconnecting Means states that: Each multiwire branch circuit …
Philippine Electrical Code (PEC) – A Primer
What is the Philippine Electrical Code? The Philippine Electrical Code (PEC) is a set of standards and regulations that govern the safe and proper installation, operation, and maintenance of electrical …