Calculation of Maximum and Minimum Short-circuit Currents
The calculation of maximum and minimum short-circuit currents as per IEC 60909 is based on the following assumptions. No change in the type of short circuit involved, that is, a …
Why The PEC Needs to Adapt IEC
The first edition of the PEC published in 1962 by PAMEE was an adaptation of the NEC customized to suit local Philippine environment. Several decades later and the PEC is …
Conductor Stranding – IEEE vs IEC Standards
Note: A conductor size expressed in mm² shall be IEC standard and sizes in AWG or kcmil shall be IEEE standard. I. Introduction Conductors may be either solid or stranded. …
Explosive Atmospheres – ANSI/ISA/UL/NFPA
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 …
IEC 61439-1 Minimum Size for PE, PEN Conductors
Background In 2010, the new standard IEC 61439 series was published to replace the IEC 60439 series. The purpose of the IEC 61439 series of standards is to harmonize as …
PEC Requirement for Ground-Fault Protection
The Philippine Electrical Code 2009 edition have mentioned Ground-Fault Protection or sometimes Ground-Fault Circuit Interrupter Protection in the following articles: Article 2.10 Branch Circuits 2.10.1.8 Ground-Fault Circuit-Interrupter Protection for Personnel. …