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Philippine Electrical Code 2009
Transcript of Philippine Electrical Code 2009
Electrical Code Historical Background Intention Why do Code Rules Change? Purpose The primary objective of the code is to establish basic materials quality and electrical works standards for the safe use of electricity for light, heat, power, communications, signaling and for other purposes. NOT intended as a design specification or an instruction manual for untrained persons. ....
The first documented case of a Code as a requirement of rules was published on 16th Nov. 1881 entitled “The Dangers of Electric Lighting”.
The first NEC was developed in 1897, eighteen after the invention of incandescent light bulb by Thomas A. Edison.
The 2009 PEC used the 2005 Edition of the National Electrical Code as referenced Code. “Practical safeguarding of persons and property from hazards arising from the use of electricity” •The term untrained persons can be interpreted to mean anyone who does NOT have an understanding of electricity and electrical construction.
•It can also mean that the Code assumes a person reading or studying it knows and understands basic Ohm Law, Kirchoff’s Law, the triangle of fire, etc. Scope the installation of electrical conductors, equipment, and raceways, monitoring, signaling, and communications conductors, equipment, and raceways; and optical fibers and raceways installed within or on, to from: •Public and private buildings.
-Installations in railway rolling stock,
aircraft, or automotive vehicles
-Installations of railways for generation, transformation, transmission, or distribution of power used exclusively for operation of transmission stock
Interpretation The Board of Electrical Engineering
shall render the final decision in the
interpretation of any portion of
the PEC, in case of controversy. Classification of Code Rules 1.Wiring Design Rules
Wiring Design Rules Installation Rules Manufacturing Rules Code Rules to determine sizes and
rating of circuit conductors
and devices. Example: 1.Branch of circuit conductors supplying a single motor shall have an capacity not less than 125% of the full-load current. Section 184.108.40.206
2.The disconnecting means for motor circuits shall have an ampere rating of at least 115% of the full-load current rating of the motor. Section 220.127.116.11
Example: 1.A disconnecting means shall be located within sight
from the motor controller. Section 4.30.102
2.In class II Division I Locations, motors, generators,
and other rotating electric machinery shall be dust
ignition proof or totally enclosed pipe ventilated and
shall be approved for class II locations.
Example: Section 18.104.22.168 A motor shall be marked with the following information:
2.Rated Volts and Full-load Amperes
3.Rated Frequency and Number of Phases,
if an alternating current motor, etc.
4.Rated full-load speed.
Existing provisions became unsafe
New methods or techniques (needs for CPE)
Thank You! by: Kit