Design

Protection of the Neutral Conductor

Overload detection shall be provided for the neutral conductor in a multi-phase circuit Where the cross-sectional area of the neutral conductor is less than that of the line conductors. The overcurrent detection for the neutral…



Philippine Electrical Code – Scope

The Philippine Electrical Code has two (2) parts. The scope of PEC 1 is defined in Section 1.0.1.2(a) while Philippine Electrical Code 2 (PEC 2), Section 1.1.2(b) states The PEC 2 covers utility facilities and…


Philippine Electrical Code – Low Voltage

Low Voltage is mentioned many times in the Philippine Electrical Code (PEC). However, the PEC failed to explicitly include Low Voltage in the definition of terms. The purpose of the PEC, being a statutory document,…


Philippine Electrical Code

Spaces About Electrical Equipment – Working Spaces

One of the most taken for granted provision of the Philippine Electrical Code is Section 1.10.2.1 Spaces About Electrical Equipment. It may have been that Electrical Design Engineers and Electrical Inspectors are not aware of…


Transformer Voltage Regulation

The impedance of a transformer limits the fault current through the transformer in the event of a fault. On the downside, it influences the voltage regulation of the transformer. International Standards provide typical impedance of…


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