PEC CHAPTER 1 AND 2 Flashcards by Calvin Calderon

What is the Title of the Chapter 1?

General

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What is the title of 1.0

Introduction

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What is the purpose of the PEC

Safeguarding of persons and property from hazards. MINIMUM requirements for safety

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R.A. 7920

National Electrical Engineering Law

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Authority of the PEC?
who oddopted it?

Approved and addopted by the board of Electrical engineering and PRC

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PRC means, PEC means

Professional Regulation Commission; Philippine Electrical Code.

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What are the main differences between Volume 1 and Volume 2 of the PEC?

Volume 1: Residential,
commercial installations

Volume 2: Distribution,
transmission, generation

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What types of electrical systems are excluded from the coverage of the Philippine Electrical Code (PEC)

Aircraft, motor vehicles, and railway rolling stocks (why? - They have their own standards)

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How does the PEC organize its rules using the three-tiered reference format, and what does each tier represent?

PEC: Chapter.Section.Subsection → Specific Rule

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What is OBO/EE?

◦ Office of the building Official/EE

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Difference between mandatory and Permissive rules

Mandatory - Required (“shall” , “shall not”)
Permissive - Allowed but not required (Shall be, shall not be)

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What is the measurement system used?

Metric System (SI)

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What is trades sizes?

Trade size designators will be used rather than dimensions to easily understand by others.

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Why does an RME need to go through apprenticeship, and who should guide them?

An RME needs apprenticeship to learn real-life electrical work. They must train under someone who already has a professional license, like a licensed electrician or engineer.

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What is needed before starting electrical work, and what information must be included in the electrical permit?

Required information includes:
- Applicant
- Electrical plans and specs signed and sealed by a PEE
- Licensed electrical practitioner in charge of the work
- Building owner
- Lot owner
- Building official
- Submit five sets of complete, signed, and sealed electrical plans

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When must the electrical inspection application be filed, and with whom?

The Office of the Building Official (OBO) before both the preliminary and final inspections

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What is the requirements for the Certificate of Final Electrical Inspection, and when is it required?

Obtained from OBO, signed by OBO/EE
◦ No connections to any power supply without the certificate
◦ Required for reconnection of service that has been cut off for more than 1 year

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Standard size of drawing sheet sizes

Standard Sizes:
◦ 760 mm x 1000 mm
◦ 600 mm x 900 mm
◦ 500 mm x 760 mm
◦ 297 mm x 420 mm (A3)*
◦ *Max 50sqm floor area and 3680VA load

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What are the required components of an electrical plan? (7)

Plan Requirements
◦ (A) Location and Site Plans
◦ (B) Legend or Symbols
◦ (C) General Notes and/or Specifications
◦ (D) Electrical Layout
◦ (E) Schedule of Loads
◦ (F) Design Analysis
◦ (G) One Line Diagram

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what is the specified height at the bottom of the sheet for this drawing’s title block

40mm

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Define Voltage

A voltage
rating must be at least equal to the circuit’s nominal voltage.

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What conductors to use?

Copper or aluminum
*i f not specified, sizes apply to copper
conductors

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what is Deteriorating Agents

Conductors and equipment must NOT be
placed in damp, wet locations, or areas with
gases, fumes, vapors, liquids, or excessive
temperatures unless they are specifically
identified for

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Can a conductor with dissimilar metals intermixed?

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Soldered splices shall first be ______ and ________ secure without solder

mechanically, electrically

what should all splices, joints, and free ends of conductors be covered with?

insulation

Is it okay if the circuit is rated 230V nominal, the equipment to be connected is 120 V

The high leg used white marking to differentiate it from the other conductors based on PEC. Observance or transgression

"high leg" which means higher voltage and the white marking is for grounding.

Conductor overload protection shall not be required where the interruption of the circuit would create a hazard, such as in a material-handling magnet circuit or fire pump circuit.

Power Loss Hazard

A conductor, other than a service conductor, that has overcurrent protection ahead of its point of supply that exceeds the value permitted for similar conductors that are protected

Tap Connductor

Standard Ampere ratings (give at least 5)

15,20,25,30

Surge arresters shall be made_________ to unqualified persons

inaccessible

Circuit breaker shall be capable of being closed and opened by _________

manual operation

A fuse or an overcurrent trip unit of a circuit breaker shall be connected in ________and with each_______

Series; Ungrounded conductor.

An electrical Enclosure located outdoor accessible to anyone, nuts and bolts that can be easily removed, providing direct access to live parts

A wall, screen, or fence shall be used to enclose an outdoor electrical installation to deter access by persons who are not qualified.

An electric panel is installed in the attic space where access is only possible using a portable ladder. Approve or not?

Not approved. The PEC indicates that it must be easily accessible without using a ladder or other tools to access the panel.

2 types of electrical layout

Power socket Layout and Lightning circuit Diagram

The minimum size of grounding electrode copper conductor shall be?

8.0mm^2; For the largest ones, 80mm^2 for alluminum: 14; 125

Spacing of receptacles horizontally shall not exceed?

1800mm

Size of largest Ungrounded service Entrance conductor or equivalent area for parallel conductors. (give the smallest and biggest

30 or smaller ; Over 500mm^2 For alluminum: 50 or smaller; Over 850

Not connected to ground or to a conductive body that extends the ground connection

Ungrounded

Provided with a means to permit circulation of air sufficient to remove an excess of heat, fumes, or vapors.

Ventilated

A flammable liquid having a flash point below 38°C

Volatile Flammable liquid

Constructed or protected so that exposure to the weather will not interfere with successful operation.

Waterproof

For grounded circuits, the voltage between the given conductor and that point or conductor of the circuit that is grounded;

Voltage to ground

A switch capable of making, carrying, and interrupting specified currents.

Interrupter switch

An assembly of a fuse support with either a fuseholder, fuse canier, or disconnecting blade

Cutout

A switching device capable of making, carrying, and interrupting currents under normal circuit conditions,

Circuit Breaker

The common point on a wye-connection in a polyphase system or midpoint on a single-phase, 3-wire system, or midpoint of a single-phase portion of a 3-phase delta system, or a midpoint of a 3-wire, direct-current system.

Neutral Point

Operation of equipment in excess of normal, full-load rating, or of a conductor in excess of rated ampacity that, when it persists for a sufficient length of time, would cause damage or dangerous overheating.

Overload

An enclosed assembly that may include receptacles, circuit breakers, fuseholders, fused switches, buses, and watt-hour meter mounting means;

power Outlet

The overhead conductors between the utility electric supply system and the service point

Service Drop

A general term for a complete subassembly of parts and devices for field conversion of utilization equipment

Retrofit Kit

At what maximum interval must all non-current-carrying metal parts of electric equipment, metal raceways, and cable sheaths be grounded and bonded to metal pipes and rails throughout a tunnel?

300m

What is the minimum clear workspace width required when cables are located on both sides?

900mm

What is the minimum clear workspace width required when cables are located on only one side?

750mm

What is the minimum vertical headroom required where cables are installed?

1800mm

At what maximum horizontal distance from the adjacent interior side wall can the vertical headroom be less than 1800 mm?

300mm

What must manhole covers have to prominently indicate their function?

Marking

What is the minimum total height required for a fence without any barbed wire extension?

2100mm

What is the minimum height of fence fabric and the minimum height of barbed wire extension allowed to meet the fencing requirements?

1800mm;300mm

At what height above the floor or grade level must an outdoor equipment enclosure be locked if it is accessible to unqualified persons?

2400mm above the floor or grade level.

what value considered as Low voltage?

all exposed live parts operate at not greater than 30 volts rms, 42 volts peak, or 60 volts dc.

For conductors of what size or smaller is connection by means of wire-binding screws, studs, and nuts with upturned lugs or the equivalent permitted?

permitted for conductors that are 5.5 mm² (2.6 mm in diameter) or smaller.

A power supply used to provide alternating current power to a load for some period of time in the event of a power failure.

Uninterruptible Power Supply

Constructed so that moisture will not enter the enclosure under specified test conditions

watertight

An assembly completely enclosed on all sides and top with sheet metal, containing primary power circuit switching or interrupting devices, with buses and connections?

Switchgear

What is defined as a large single panel, frame, or assembly of panels that contains switches, overcurrent and other protective devices, buses, and usually instruments, and is generally accessible from both the front and rear?

Switchboard

An automatic or nonautomatic device for transferring one or more load conductor connections from one power source to another.

Switch, Transfer

The point of connection between the facilities of the serving utility and the premises wiring.

Service point

he underground conductors between the utility electric supply system and the service point.

Service Lateral

An outlet where one or more receptacles are installed.

Receptacle Outlet

made up in the form of a cable.

Service cable

The conductors from the service point to the service disconnecting means.

Service Conductors

An enclosed channel of metallic or nonmetallic materials designed expressly for holding wires, cables, or busbars, with additional functions as permitted in this Code.

Raceway

A single panel or group of panel units designed for assembly in the form of a single panel, including buses and automatic overcurrent devices, and typically placed in a cabinet or cutout box accessible only from the front?

Panel Board

Electrically connected to a source of voltage.

Energized

What is defined as all circuit conductors between the service equipment, the source of a separately derived system, or another power supply source and the final branch-circuit overcurrent device?

Feeder

What is defined as an enclosure designed for surface mounting with swinging doors or covers that are secured directly to and telescoping with the walls of the enclosure?

Cutout Box

What does the term "dead front" mean in the context of electrical equipment?

It means that there are no live parts exposed to a person on the operating side of the equipment.

What is the ratio of the maximum demand of a system to the total connected load of that system called?

Demand Factor.

The circuit conductors between the final overcurrent device protecting the circuit and the outlet(s).

Branch Circuit

The current, in amperes, that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.

Ampacity

Title of Chapter 2?

Wiring and Protection

GFCI means

Ground Fault Circuit Interrupter.

What insulation rating is required for grounded conductors over 1000V?

Must be rated not less than 600V.

How are ungrounded DC conductors identified for sizes 14 sqmm or less?

-continuous red/black outer finish -red/black stripes -markings like “POS/NEG” every 610mm

how can a grounded conductor be identified?

By a continuous white or gray outer finish or, three continuous white or gray stripes on other than green insulation.

Branch Circuits In what areas is GFCI protection required in dwelling units? (Give at least three).

Bathrooms garages outdoors crawl spaces kitchens sinks boathouses bathtubs/showers laundry areas.

What is the “1800 rule” in outlet spacing?

Receptacles should be installed within 1800mm of appliances and spaced no more than 1800mm apart along walls.

What is the requirement for 20A branch circuits in dwellings?

Must be provided for small appliances, laundry, bathroom, and garage outlets—with no other outlets allowed on those circuits.

Where should bathroom receptacles be located

Within 900mm of the basin and not more than 300mm below it.

What is the max height for outdoor receptacles above grade?

2000mm

What is the outlet requirement for hallways 3000mm or more in length?

At least one receptacle outlet must be installed

Minimum Width of the working space is?

762mm

The working space must be less than what distance from the nearest edge?

7600mm

1.10.3 is?

Over 1000 Volts, Nominal

shall be provided for all working spaces about electrical equipment

Illumination

Grounded and bonded intervals is?

300 m throughout the tunnel.

Dimensions for manholes is?

Rectangular access openings shall not be less than 650 mm x 550 mm. Round access openings in a manhole shall not be less than 650 mm in diameter.

What are the minimum requirements for the width of a clear workspace and the vertical headroom where cables are located?

The clear workspace must be at least 900 mm wide if cables are on both sides. The clear workspace must be at least 750 mm wide if cables are on one side only. The vertical headroom must be at least 1800 mm, unless the opening is within 300 mm of the inside wall of the enclosure.

Title of 1.3.2.2 is?

PEC CHAPTER 1 AND 2 Flashcards

(102 cards)