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Questions and Answers
What is the primary objective of the Philippine Electrical Code (PEC)?
What is the primary objective of the Philippine Electrical Code (PEC)?
- To protect individuals and properties from electrical hazards. (correct)
- To promote the use of renewable energy sources.
- To improve the aesthetic design of electrical systems.
- To standardize the cost of electrical installations.
According to the PEC, who is authorized to perform electrical installations?
According to the PEC, who is authorized to perform electrical installations?
- Any homeowner with basic electrical knowledge.
- Only individuals holding valid licenses as electrical practitioners (PEE, REE, RME). (correct)
- Construction workers under the supervision of a foreman.
- Engineering students completing their academic projects.
Electrical installations governed by the PEC encompass which of the following?
Electrical installations governed by the PEC encompass which of the following?
- Only the design of electrical power plants.
- Maintenance of household appliances.
- Wiring for telecommunication systems only.
- The installation of conductors, equipment, raceways, and communication systems. (correct)
Which government body is responsible for enforcing the Philippine Electrical Code (PEC)?
Which government body is responsible for enforcing the Philippine Electrical Code (PEC)?
What documentation must be secured prior to commencing any electrical installation project?
What documentation must be secured prior to commencing any electrical installation project?
What term defines the maximum current a conductor can carry continuously without exceeding its temperature rating?
What term defines the maximum current a conductor can carry continuously without exceeding its temperature rating?
What electrical component is used to establish a secure connection between a flexible cord and a receptacle?
What electrical component is used to establish a secure connection between a flexible cord and a receptacle?
What measure is implemented to ensure electrical continuity and conductivity between separate metallic parts of an electrical installation?
What measure is implemented to ensure electrical continuity and conductivity between separate metallic parts of an electrical installation?
In electrical wiring, what are the conductors that extend from the final overcurrent protective device to the outlets called?
In electrical wiring, what are the conductors that extend from the final overcurrent protective device to the outlets called?
Which type of protective device is designed to automatically interrupt a circuit's current flow when a predetermined overcurrent is detected?
Which type of protective device is designed to automatically interrupt a circuit's current flow when a predetermined overcurrent is detected?
What electrical device is used to safely transfer connections for one or more load conductors from one power source to another?
What electrical device is used to safely transfer connections for one or more load conductors from one power source to another?
What is a panel called that acts as an assembly point for circuit breakers and other control devices designed for managing multiple power circuits?
What is a panel called that acts as an assembly point for circuit breakers and other control devices designed for managing multiple power circuits?
What is the purpose of a Ground-Fault Circuit Interrupter (GFCI)?
What is the purpose of a Ground-Fault Circuit Interrupter (GFCI)?
What type of electrical load is characterized by continuous operation for three hours or more?
What type of electrical load is characterized by continuous operation for three hours or more?
Which type of circuit breaker is designed to trip almost instantly in response to high levels of current flow, without any intentional delay?
Which type of circuit breaker is designed to trip almost instantly in response to high levels of current flow, without any intentional delay?
Flashcards
Purpose of Philippine Electrical Code (PEC)
Purpose of Philippine Electrical Code (PEC)
Protects persons and property from dangers arising from the use of electricity.
Who can use the PEC?
Who can use the PEC?
Only licensed electrical practitioners (Professional Electrical Engineer, Registered Electrical Engineer, and Registered Master Electrician) are authorized.
What does the PEC cover?
What does the PEC cover?
The installation of conductors, equipment, raceways, and communication systems.
Who enforces the PEC?
Who enforces the PEC?
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Electrical Permit
Electrical Permit
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Ampacity
Ampacity
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Attachment plug
Attachment plug
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Bonding conductor or jumper
Bonding conductor or jumper
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Branch circuit
Branch circuit
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Circuit breaker
Circuit breaker
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Transfer switch
Transfer switch
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Distribution board
Distribution board
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Raceway
Raceway
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Surge arrester
Surge arrester
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Grounding electrode conductor
Grounding electrode conductor
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Study Notes
- The Philippine Electrical Code (PEC)'s primary goal is to protect people and property from electrical hazards.
- Only licensed electrical practitioners, such as Professional Electrical Engineers (PEE), Registered Electrical Engineers (REE), and Registered Master Electricians (RME), have the authority to use the PEC for electrical installations.
- The PEC covers the installation of conductors, equipment, raceways, and communication systems.
- The Office of the Building Official (OBO) is the government agency in charge of enforcing the PEC.
- An Electrical Permit is required before starting an electrical installation project.
- Ampacity refers to the highest current a conductor can continuously carry without exceeding its temperature rating.
- Attachment plugs establish a connection between a flexible cord and a receptacle.
- Bonding conductors or jumpers are responsible for ensuring electrical continuity and conductivity between metal parts.
- Branch circuits are the conductors between the final overcurrent device and the outlets.
- Fuses and circuit breakers are protective devices that automatically open a circuit when a predetermined overcurrent occurs.
- Transfer switches transfer one or more load conductor connections from one power source to another.
- Distribution boards house circuit breakers and other control devices for power circuits.
- Raceways consist of enclosed channels designed to hold and protect electrical wires.
- Surge arresters limit voltage surges by bypassing surge current.
- General-purpose branch circuits supply two or more outlets for lighting and appliances.
- A "Service Drop" connects the utility supply to the service point in an electrical distribution system.
- Grounding electrode conductors provide an electrical path designed for safe grounding and fault current dissipation.
- Bonding jumpers ensure electrical continuity between metallic parts in an electrical system.
- Grounding systems are a protective measure used to prevent electrical shocks and ensure safe fault current dissipation.
- Grounded conductors carry current under normal conditions and are connected to the ground.
- The minimum headroom for working spaces around electrical equipment is 2000 mm.
- The minimum width of working space in front of electrical equipment is 750 mm.
- The clearance requirement for service drop conductors over public streets is 6 meters.
- The required burial depth for underground service lateral conductors is 600 mm.
- The minimum clearance for overhead service conductors above sidewalks accessible only to pedestrians is 3.7 meters.
- Arc-Flash Hazard Analysis calculates the possible energy release from an electrical arc fault.
- Short-circuit analyses determine the kAIC rating of circuit breakers.
- Circuit breakers protect a circuit against excessive current.
- Inspection Certificates ensure compliance with electrical safety standards in electrical installations.
- Building electrical designs must be signed by a licensed electrical practitioner for approval.
- Isolating switches isolate an electric circuit from the power source.
- Devices are units of an electrical system that carry or control, but do not utilize, electric energy.
- Ground-Fault Circuit Interrupters (GFCIs) automatically de-energize a circuit when a ground fault occurs.
- Continuous loads operate continuously for three hours or more.
- Instantaneous-trip circuit breakers trip instantly when excessive current flows without intentional time delay.
- Bonding jumpers connect two or more portions of the equipment grounding conductor.
- Overcurrent protective devices prevent excessive current flow that could cause damage in a circuit.
- Motor-circuit switches are rated in horsepower and interrupt motor currents.
- Bare conductors do not have covering or insulation.
- Surge arresters protect electrical systems from high transient voltage surges.
- Grounding systems provide a low-impedance path for fault current.
- Grounding electrode conductors connect the grounding electrode to the electrical system.
- Solidly grounded systems connect to the earth without inserting any resistor or impedance.
- Equipment grounding conductors (EGC) provide a path for fault current to return to the source.
- Bonding establishes electrical continuity between two normally non-current-carrying metal parts.
- Grounding electrodes provide a safe path for stray electrical currents.
- Equipment grounding conductors ensure a continuous, low-impedance path in a grounding system.
- The neutral point is the common point in a wye-connected polyphase system.
- Bonding conductors connect non-current-carrying metal parts to an effective ground-fault current path.
- Panelboards contain protective devices for power distribution.
- The minimum workspace width required in front of electrical equipment is 750 mm.
- The minimum height clearance for service entrance conductors above driveways is 4.5 meters.
- The minimum clearance required for overhead conductors above public streets is 7.5 meters.
- The required depth for buried service lateral conductors is 600 mm.
- The minimum headroom clearance required for electrical workspaces is 2000 mm.
- Short-circuit analyses determine the kAIC rating of protective devices.
- Before an electrical installation is approved for operation, it requires inspection and approval by the Office of the Building Official (OBO).
- Arc-flash hazard analyses determine the required personal protective equipment (PPE).
- One-line diagrams show the main electrical components and their interconnections.
- An electrical permit must be posted at the job site during electrical installation work.
- Electrical equipment rated at 1200 amperes or more requires 2 exits.
- Arc-flash hazard analyses determine the required personal protective equipment (PPE) for electrical work.
- Short circuits occur when two conductors come into direct contact.
- All electrical plans must be signed and sealed by a licensed electrical practitioner before installation.
- Bare conductors are uninsulated electrical conductors.
- Ground-fault circuit paths are continuous conductive paths designed to carry fault current safely.
- Grounded conductors are intentionally connected to earth.
- Demand factor is used in electrical design to calculate the expected maximum load demand.
- An electrical permit application must include a load schedule and a signed plan by a licensed electrical practitioner.
- The minimum required workspace depth in front of electrical equipment is 750 mm.
- Continuous loads increase at a steady rate over time.
- Equipment is a general term for all electrical materials, fittings, and devices in an installation.
- Main bonding jumpers ensure proper grounding of an electrical system.
- The clearance requirement for service drop conductors above residential driveways is 3.7 meters.
- The minimum headroom clearance for switchboards is 2000 mm.
- Trade size systems are used to assign standard sizes to electrical conduits.
- Surge arresters limit transient voltage surges.
- Individual branch circuits supply only one utilization equipment.
- Disconnecting means provide a way to manually disconnect electrical conductors from their power source.
- Insulated conductors are encased within material that is recognized as electrical insulation.
- Compliance with electrical safety standards requires a signed electrical permit and inspection certificate.
- Time-current curves show the tripping characteristics of a circuit breaker over time.
- During electrical installation, a valid electrical permit must be posted at the job site.
- The required minimum height of a panelboard above the floor is 1200 mm.
- Fuses are protective devices used in electrical installations.
- Grounding electrodes provide a stable reference point for electrical potential.
- Overcurrent protective devices protect conductors and equipment from excessive current.
- Electrical current is measured in Amperes.
- Planning for future electrical system expansion requires additional space in raceways and panelboards.
- Line voltage is the voltage between any two conductors in a three-phase system.
- Auxiliary gutters provide space for additional wiring and prevent overcrowding in an electrical installation.
- The minimum required burial depth for direct burial conductors under a concrete slab is 600 mm.
- Electrical installations located in outdoor amusement parks or fairgrounds are classified as temporary installations.
- Electrical permits ensure compliance with electrical safety codes.
- Before energizing a newly installed electrical system, inspection and approval by the proper authority is required.
- Service points are the point where a utility company's electrical supply connects to a consumer's wiring system.
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