History of Earthing / Grounding
When Thomas Alva Edison started his electric illuminating company and began the electrical distribution system, he used only one insulated (from earth) conductor and the earth for the return conductor. …
Classification of Grounding According to Functions
Electrical equipment grounding for a power system can be classified according to functions: working grounding, lightning protection grounding, protective grounding, and instrumentation and control equipment grounding. Working Grounding This is …
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 …
Is your Solar Panel Installation Compliant to Philippine Electrical Code 2017 Edition?
Philippine Electrical Code 2017 Edition – Requirements Effective January 1, 2019, the Philippine Electrical Code 2017 Edition, requires PV systems to be provided with a rapid shutdown for the safety …
Ground-fault Protection for Personnel In Dwelling Units In Accordance to Philippine Electrical Code 2017 Edition
Definition of Terms The Philippine Electrical Code has provided the definitions. Dwelling Unit A single unit, providing complete and independent living facilities for one or more persons, including permanent provisions …
Selective Coordination According to Philippine Electrical Code 2017 Edition
The Philippine Electrical Code defines Selective Coordination as “Localization of an overcurrent condition to restrict outages to the circuit or equipment affected, accomplished by the choice of overcurrent protective devices …