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Standards - Note 1


It is important to keep in mind that, before any actual electrical work is done, everything starts at the design stage. Considerations on SAFETY and QUALITY need to be included (and examined) on paper in order to avoid any mistakes that may result in costly back jobs, or worse, loss of life and property due to electrical fire.

Therefore, electrical practitioners in the Philippines need to be aware of the following provisions in the Philippine Electrical Code (PEC) concerning design analysis.


2017 PEC (A) Mandatory Rules.
[ 2017 NEC 90.5 (A) ]

"Mandatory rules of this Code are those that identify actions that are specifically required or prohibited and are characterized by the use of the terms SHALL or SHALL NOT."


2017 PEC (F) Plan Requirements - Design Analysis.
[ This PEC provision does not exist in NEC. ]

"Design analysis SHALL be included on the drawings or SHALL be submitted on separate sheets of standard size, and SHALL show:"

(1) "Branch circuits, sub-feeders, feeders, busways, and service entrance;"

(2) "Types, ratings, and trip settings of overload protective devices;"

(3) "Calculation of voltage drops."

(4) "Calculation of short circuit current for determining the interrupting capacity of overcurrent protective device for residential, commercial, and industrial establishment;"

(5) "Protection coordination of overcurrent protective devices;"
[ Added in 2017 PEC ]

(6) "Arc-Flash Hazard Analysis to determine required personal protective equipment (PPE) in other than dwelling place - (see Appendix H for PPE)"
[ Added in 2017 PEC ]


Professional Electrical Engineers (PEE) are required to perform such design analysis before signing and sealing any electrical plans.

Registered Electrical Engineers (REE) who wish to upgrade to PEE status are required by the Board of Electrical Engineering (BEE) to include design analysis in their Technical Engineering Report (TER).

Registered Master Electricians (RME) are required to understand design analysis so that they can interpret electrical plans and implement them properly.

There are simplified examples in 2017 PEC Appendix D (Wiring Design Examples) that will guide electrical practitioners in the right direction.


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