Electrical Conduits and Connections Quiz

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary advantage of using a three-phase power circuit?

It is more suitable for small residential consumers.

It is less complicated than single-phase power.

It requires fewer wires than single-phase power.

It can efficiently handle larger power loads. (correct)

What role does a substation play in the electrical power system?

It generates electricity for consumers.

It converts electrical current and adjusts voltage levels. (correct)

It serves as the main power source for solar energy.

It connects renewable energy sources directly to households.

Which of the following describes single-phase power circuits?

They typically use alternating current and have three wires. (correct)

They consist of three or more wires for large power consumption.

They require no grounding for safety purposes.

They are more complex and used for industrial applications.

Which feature characterizes electrodynamics in electricity?

It encompasses the flow of electricity, such as alternating current. Signup and view all the answers

What is one of the ideal characteristics of the south region for solar panel placement?

It receives optimal sunlight throughout the year. Signup and view all the answers

What is the primary purpose of a circuit breaker?

To protect the circuit from overload or short circuits Signup and view all the answers

Which of the following describes a series circuit?

All components share the same current flow in a single pathway Signup and view all the answers

What function does a Ground Fault Circuit Interrupter (GFCI) serve?

To prevent electricity flow in wet or high moisture areas Signup and view all the answers

What is the role of a raceway in electrical wiring?

To hold and protect electric wires and cables Signup and view all the answers

The ground conductor is primarily used for what purpose in electrical systems?

To connect electrical equipment to the earth Signup and view all the answers

Which of the following components is NOT typically found in an electrical entrance cap?

Transformer Signup and view all the answers

What type of conduit is best suited for areas prone to corrosion?

Rigid Metal Conduit (RMC) Signup and view all the answers

Which electrical power source utilizes natural phenomena such as wind for energy generation?

Hydro Fuel Signup and view all the answers

What is the main responsibility of the National Grid Corporation of the Philippines (NGCP)?

Maintaining and ensuring optimal condition of transmission assets Signup and view all the answers

Which conduit type is preferred for residential low-voltage installations?

Electrical Metallic Tubing (EMT) Signup and view all the answers

Which of the following is a method NGCP uses to ensure energy delivery?

Routine maintenance on lines and substations Signup and view all the answers

Which component is typically part of the electrical power source options?

Nuclear Energy Signup and view all the answers

Which conduit does NOT offer significant impact resistance and is better used in specific installations?

Electrical Metallic Tubing (EMT) Signup and view all the answers

What is the main source of natural lighting during the daytime?

Windows and skylights Signup and view all the answers

Which type of reflection describes light being scattered in all directions?

Diffused Reflection Signup and view all the answers

What is the fundamental difference between direct and indirect lighting?

Direct lighting creates shadows, while indirect lighting distributes light upward and downward Signup and view all the answers

Which unit measures luminous intensity?

Candlepower Signup and view all the answers

What does glare refer to in the context of lighting?

The excessive brightness of light Signup and view all the answers

In terms of light rays, what happens when they encounter a dark surface?

They are distorted and absorbed Signup and view all the answers

Which of the following components is not part of conduit fittings?

Snap connectors Signup and view all the answers

Which term describes the bending of a ray of light as it passes through a material?

Refraction Signup and view all the answers

What is the SI unit for electric current?

Amperes Signup and view all the answers

Which unit is used to measure the potential difference in an electrical circuit?

Volt Signup and view all the answers

What does the formula W = V x A represent?

Power is equal to voltage multiplied by current Signup and view all the answers

Which of the following is a characteristic of alternating current (AC)?

Magnitude varies in a sinusoidal manner Signup and view all the answers

What type of resistance does a conductor provide to electric current?

Opposition Signup and view all the answers

Which of the following materials is moisture resistant and suitable for wet locations?

XHHW Signup and view all the answers

What is one characteristic of volt-amperes (VA)?

Equal to the product of voltage and current Signup and view all the answers

What is the purpose of a junction box in electrical wiring?

Joins and splices electrical connections Signup and view all the answers

Study Notes

Entrance Cap

3 electrical connections: Ground, Neutral, Hot

3 Phase Entrance Cap

3 electrical connections: Ground, Neutral, Hot with 3 additional positive connections (B, R, BL)

Conduit Types

**Galvanized Rigid Conduit (GRC) / Rigid Metal Conduit (RMC) **- common in industrial & hazardous areas.
**PVC PIPE CONDUIT (Polyvinyl Chloride) **- rigid pipe
EMT PIPE (Electrical Metallic tubing) - suited for low-voltage installations in commercial and residential spaces.
IMC PIPE (Intermediate Metal Conduit) - excellent for commercial and residential spaces, including areas with corrosion risks.
Liquid-Tight Flexible Metal Conduit - flexible and durable
**Flexible Metal Conduit (FMC) ** - flexible, commonly used for household appliances.
MICA TUBE - non-rigid pipe
ORANGE FLEXIBLE HOSE - non-rigid pipe
FLEXIBLE HOSE - commonly used in plumbing for venting.

Electrical Power

Meralco - largest electricity distributor in the Philippines.
National Grid Corporation of the Philippines (NGCP) - responsible for ensuring the optimal condition of the country's transmission assets.
Power Sources
- Fossil Fuel (oil imported)
- Hydro Fuel (water) - Mindanao (Maria Cristina Falls), Ilocos (Wind Mill)
- Geothermal (thermal - heat) - Laguna (Mt. Makiling)
- Nuclear Energy - Bataan
- Solar Energy

Power Plant

Generation - Level 1: Power plant supplies electricity to homes and consumers.
Transmission - Level 2: NGCP transmits electricity to distribution substations using high-voltage lines.
Distribution - Level 3: Substations lower voltage for local distribution to homes and buildings.
Bulk Power Substation - Level 4: Large substations used for distribution at a larger scale.

Single Phase Power and Three Phase Power

Single Phase Power - direct connection from power source. 3 wires (including ground).
Three Phase Power - power circuit used for high-consumption areas. 4-5 wires (including ground and neutral).

Substation

An auxiliary power station that converts electrical current and adjusts voltage.

General Classes of Electricity

Electrodynamics - dynamic electricity, AC current.
Electrostatic - static electricity, DC current.

Panel Board

Enclosure for branch circuits, protects circuits from overload or short circuits.

National Electrical Manufacturer Association (NEMA)

Establishes standards for medical and electrical equipment manufacturing.

Circuit Breaker & Switch

Circuit Breaker - Electrical switch that protects circuits from damage.
Switch - Device used to interrupt the flow of electricity in a circuit.

Ground Conductor

Metal wire, bar, or material that connects equipment to earth through a grounding electrode.

Copper Wire

Conductor in many electrical wiring categories.

Wires

Insulated material that passes through an outlet.

Roughing-ins

Channels or pipes that route wires.

RACEWAY

Channel designed to hold electric wires and cables.

Electrical Box

Encloses wire connections.
- Junction Box
- Utility Box
- Pull Box

Convenience Outlet

Where a wired device is connected to receive electrical power.

Ground Fault Circuit Interrupter (GFCI)

Used in wet areas, senses power surges and interrupts the power flow.

Electromotive Force (EMF)

Electric potential produced by a cell or changing magnetic field.

Voltage

Potential difference or EMF expressed in volts.

Volts

Unit of measurement for EMF.

Watt (W)

SI unit for power, calculated as W= V x A.

Wattage

Amount of power required to operate an electrical device.

Ampere (A)

Basic SI unit of electric current.

Amperage

Strength of electric current measured in amperes.

Resistance (R)

Opposition to current flow that causes energy conversion into heat.

Alternating Current (AC)

Electric current that reverses direction periodically.

Volt Ampere (VA)

Unit of electric measurement used for alternating current systems.

General Wiring (Types & Locations)

RHW - Moisture and heat resistance rubber - Dry and wet locations.
T - Thermoplastic - Dry locations
TW - Moisture resistant thermoplastic - Dry and wet locations.
THHN - Heat resistant thermoplastic - Dry locations
THW - Moisture & heat resistant thermoplastic - Dry and wet locations
THWN - Moisture & heat resistant thermoplastic - Dry and wet locations.
XHHW - Moisture & heat resistant cross linked - Dry and wet locations.
SA - Silicone asbestos - Dry locations.
AVA - Asbestos and varnished cambric - Dry locations only.

Conduits

Pipes or tubing used as electrical raceways.
- Rigid Metal (RSC, EMT)
- Flexible Metal (BX)
- Rigid Nonmetal (Plastic)
- Flexible Nonmetal (Plastic)

Electrical Boxes

Outlet box - where cable ends
Utility Box - for outlets and switches
Pull Box - for pulling cables
Junction Box - for joining and splicing wires.
Cut-out Box - metal box

Outlets

Lighting Outlet - single gang, two gang, or three gang
Convenience Outlet - Receptacle Outlet
Duplex Convenience Outlet - 2 outlets in one box (Single Convenience Outlet - one outlet in a box)
- FM - Flash mounted
- SM - Surface mounted

Condulets/Unilets (Conduit Fittings)

Straight and angle couplings
Elbow Fittings
Tee and Cross connections

Pull Box

An electrical box used for pulling wires into or out of a circuit.

Lightings

Lighting (illumination) - deliberate use of light for practical or aesthetic effects.
Light Sources - lamps and lighting fixtures.
Natural illumination - daylight (windows, skylights, light shelves).

Daylight

Sunlight, used for natural lighting.

Candlepower

Unit of luminous intensity.

Candella (cd)

SI unit of light source's capacity to provide illumination.

Lumen

Unit of measurement for the flow of light energy onto a surface.

Illumination

Density of luminous flux reflected from a surface.

Light rays

Travel in a straight line; absorbed by dark surfaces, deflected by white surfaces, and pass through transparent surfaces.

Physics of Light

Light rays travel in a straight line, can be reflected, absorbed, or passed through different surfaces.

Specular Reflection

Regular reflection; angle of reflection.

Diffuse Reflection

reflected light scattered in all directions.

Refraction

Bending of light rays passing through a material obliquely.

Brightness

Perception of light intensity being transmitted.

Glare

Excessive brightness.

Luminance

Measured quantity.

Different Types of Lighting Fixtures

Direct - creates shadows
Indirect - distributes light upward and downward.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Description

Test your knowledge on various electrical connections and conduit types. This quiz covers the basics of entrance caps, three-phase systems, and different types of conduits used in residential and industrial settings. Perfect for electrical engineering students and professionals looking to refresh their knowledge.