pec (phil elec. code) (by jvm) - part-1
DESCRIPTION
PEC lectureTRANSCRIPT
BOARD OF ELECTRICAL ENGINEERING
PROFESSIONAL REGULATION COMMISSION
Philippine Electrical Code(Part-1)
Jaime V. Mendoza, PEE, MTMJaime V. Mendoza, PEE, MTM MemberMember
Board of Electrical EngineeringBoard of Electrical Engineering
2
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Abstract
Electrical Grounding is the most neglected subject by electricians, electrical inspectors, maintenance construction engineers, design engineers and many other members of the electrical industry in making electrical installations in the field, maintenance of factories, building or substations. Electrical Grounding is no big secret!!! It obeys the laws of electricity, and when examined piece-by piece, all elements fit together very nicely to form an effective grounding system.
When grounding is improperly installed, the results can range from minor physical harm, costly damage to electrical facilities, or even to death to an individual. This unwanted harm and damages are caused by electric shock and electrical faults. Once recent problem connected with faulty grounding installations is the effect they have on microelectronic equipment such as computers, audio recording studio, etc.. Faulty electrical grounding results in what we called “dirty electricity”. The use of high-technology is not decreasing rather, it will continue to increase. Stable, clean electrical power is now requirement, anything less unsatisfactory.
3
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
R. A. 7920
An Act For, A More Responsive and Comprehensive Regulation For the Practice, Licensing, and Registration of Electrical Engineers and Electricians.
Sec. 4 Powers and Duties of the Board The Board shall exercise executive
/administrative or quasi-legislative (rule-making) or quasi-judicial (investigative) powers in carrying out the provisions of this Act.
4
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Powers of the Board
Sec. 29. Revocation of Certificates of Registration and Suspension from the Practice of the Profession. The Board shall have the power, upon
proper notice and hearing, to revoke any certificate of registration of any registrant, to suspend him from the practice of the profession or to reprimand him for any specified in the preceding section, or for the use of perpetration of any fraud or deceit in obtaining a certificate of registration, or for gross negligence or incompetence or for unprofessional or dishonorable conduct, for violation of this Act, the rules and regulations and other policies of the Board and the Code of Professional Ethics.
5
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Licensing Definition – a permission granted by competent
authority to engage in a practice of profession or business or in an activity.
A PEE who designed, signed, and sealed an electrical plans – means he/she guaranteed the safety of the electrical plans for 15 years in accordance to Civil Code.
PEE, REE or RME who signed as in-charge of installations also guaranteed the safety of the electrical installations for 15 years.
You can only guaranteed the safety of your electrical designs/installations if you are well-versed in the Philippine Electrical Code.
“Licensing guarantees the safety
of your works!!!!”
6
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
PURPOSE OF PEC
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.
“Practical safeguarding of persons and property from hazards arising from the use of electricity”
THE PHILIPPINE ELECTRICAL CODEKEY TO SAFETY AND FIRE PREVENTION
COMPLIANCE TO THE PEC WILL ENSURE SAFETY AND PREVENT ELECTRICAL FIRES
7
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Components that Create a Fire or Explosion
In the Installation Rules , one element of the Triangle of Fire is removed to make the installation safe.
8
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
The National Electrical Code 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.
Since 1911, the NFPA of Quincy, Massachussets, has been responsible for the maintenance and publication of the NEC.
Regularly revised (every three years) to reflect the evolution of products, materials, and installation techniques.
21 Separate Committee, each consisting of 15-20 persons. Members of each committee meet several times, discuss proposed changes, accepting some and rejecting others, and rewrite (as required) the sections of the Code that were assigned to their committee.
9
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Consideration should be given for future expansion of electrical systems but this is not a Code requirement.
The PEC is a safety standard, NOT a design guide. Electrical designs must comply with the requirements of PEC to ensure safety.
THE PHILIPPINE ELECTRICAL CODE
Energy management, maintenance, and power quality issues aren’t within the scope of the PEC.
10
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
CLASSIFICATION OF CODE RULES1. Wiring Design Rules
2. Installation Rules
3. Manufacturing Rules
THE PHILIPPINE ELECTRICAL CODE
11
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Wiring design rules used to determine sizes and rating of circuit conductors and devices.
Example:1. Branch circuit conductors supplying a single motor
shall have an ampacity not less than 125% of the full-load current. Section 4.30.2.2
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 4.30.10.10(a)
THE PHILIPPINE ELECTRICAL CODE
CLASSIFICATION OF CODE RULES
12
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Installation rules
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. Sections 5.02.8
THE PHILIPPINE ELECTRICAL CODE
CLASSIFICATION OF CODE RULES
13
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Manufacturing rules
Example:
Section 4.30.1.7
A motor shall be marked with the following information:
1) Manufacturer’s Name
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
THE PHILIPPINE ELECTRICAL CODE
CLASSIFICATION OF CODE RULES
14
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Various Categories of the Code Rules which apply in a Motor and the Circuits
The Philippine Electrical Code
15
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Accessible, Readily
Accessible, Readily
16
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Accessible, Readily
17
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Overcurrent
18
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Service Conductors
Service Conductors – The conductors from the service point to the service disconnecting means.
Service Drop – The overhead service conductors from the last pole or other aerial support to and including the splices, if any, connecting to the service-entrance conductors at the building or other structure.
Connection point
19
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Service Lateral
Underground systems showing service laterals
run from a pole and from a transformer.
20
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Service Point
21
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Boundary: PEC 1 and PEC 2
The PEC 1 does NOT applyto service drop or service lateral conductors underthe exclusive control of the electric utility.
Service Point
22
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Wiring Methods
23
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Wiring Methods
24
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Wiring Methods
25
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Unused Raceway and Cable Openings
Unused cable or raceway openings must be closed with a fitting that provides equivalent protection.
26
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Unused Openings
27
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Integrity of Electrical Equipment
Internal parts of electrical equipment must be covered to avoid damage from paint or other substances.
28
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Deteriorating Agents
29
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Short-Circuit Current Rating
30
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Conductor Termination
31
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Conductor Termination
32
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Conductor Termination
33
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Conductor Termination
34
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Conductor Splicing
Conductors must be spliced by a listing splicing deviceand they are NOT required to be twisted together prior tothe installation of a twist-on wire connector.
35
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Conductor Sizing
36
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Receptacles
General Receptacle Placement -210.52(A)
37
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Maximum Distance to a Receptacle210.52(A)(1)
Receptacles
38
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Wall Spaces 600 mm (2 ft) in Width-210.52(A)(2)(1)
Receptacles
39
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Space Measured Around Corners
Receptacles
210.52(A)(1) & 210.52(A)(2)(1)
40
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Fixed Panels210.52(A)(2)(2) & 210.52(A)(1)
Receptacles
41
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Receptacle placement in a kitchen
Receptacles
42
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Electric Shock
Human in parallel with equipmentgrounding conductor during groundfault
Human completing the path for current the earth
43
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Electric Shock
Electric Shock Severity
1. Path of Current through Body
2. Length of Time Current Flows
3. Amount of Current through Body
44
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Effects of AC Electric Shock
Level (in milliamperes) of current through the body
ELCB!!!
45
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Ground Fault Circuit Interrupter
GFCI – A device intended for the protection of personnel that functions to deenergize a circuit or portion thereof within an established period of time when a current to ground exceeds the values established for a device.
The GCFI does not protect someone against receiving a electrical shock, but it does limit the time hazards exists. Hazard exist only during period of time fault is there.
46
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Ground Fault Circuit Interrupter
47
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Ground Fault Circuit Interrupter
240 - V
240 V – Line Source
48
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Ground Fault Circuit Interrupter
49
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Ground Fault Circuit Interrupter
50
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
Ground Fault Circuit Interrupter
A GFCI is designed to protect persons against electric shock.It operates on the principles of monitoring the unbalanced currentBetween the ungrounded and the grounded neutral conductor.
51
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
GCFI CAN ELIMINATE THIS!
Ground Fault Circuit Interrupter
52
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
GFCI Protection for Personnel1. Dwelling Bathroom Receptacle
and /or 250 V
53
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
GFCI Protection for Personnel2. Dwelling Garage Receptacle
54
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
GFCI Protection for Personnel2. Dwelling Garage Receptacle
All 15 and 20 A, 125/250 V receptacles in accessory
buildings and similar work areas must be GFCI protected.
55
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
GFCI Protection for Personnel3. Dwelling Outdoor Receptacle
56
BOARD OF ELECTRICAL ENGINEERING
Philippine Electrical Code
PROFESSIONAL REGULATION COMMISSIONIIEE – ERCSA
IIEE - SQC
GFCI Protection for Personnel4. Dwelling Basement Receptacle