Electrical Terminology and Circuit Breakers

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Questions and Answers

What defines intermittent operation in electrical terms?

Operation with recurrent load conditions (correct)
Operation at varying loads for extended periods
Operation at high loads with no defined time frame
Operation at a constant load for short, specified time

What type of dwelling consists solely of one dwelling unit?

Dwelling, Multifamily
Dwelling, Apartment Complex
Dwelling, One-Family (correct)
Dwelling, Two-Family

Which term refers to apparatus enclosed in a case that can withstand an explosion?

Safety Apparatus
Explosionproof Apparatus (correct)
Protected Equipment
Enclosed Equipment

Which option describes a string of outdoor lights suspended between two points?

Festoon Lighting (A) Signup and view all the answers

What does the term 'energized' imply in electrical contexts?

Electrically connected to a source of voltage (D) Signup and view all the answers

What does 'exposed' refer to when applied to live parts in electrical systems?

Capable of being inadvertently touched or approached (A) Signup and view all the answers

What is a licensed electrical practitioner?

One who has undergone training in electrical engineering (A) Signup and view all the answers

Which of the following refers to all circuit conductors between the service equipment?

Feeder (A) Signup and view all the answers

What does the term 'Inverse Time' indicate when applied to circuit breakers?

A purposely introduced delay is present (C) Signup and view all the answers

Which of the following best defines a 'Nonadjustable' circuit breaker?

It does not have any adjustments available (D) Signup and view all the answers

What is meant by 'Continuous Load' in electrical systems?

Load expected to continue for 3 hours (A) Signup and view all the answers

In the context of circuit breakers, what does the term 'Setting' refer to?

The value of current, time, or both for adjustment (A) Signup and view all the answers

Which of the following describes a 'Conductor, Insulated'?

A conductor encased in recognized materials (B) Signup and view all the answers

What does 'Coordination (Selective)' achieve in an electrical system?

Localizes overcurrent conditions to restrict outages (D) Signup and view all the answers

What is a 'Cutout Box' designed for?

Surface mounting with swinging doors (C) Signup and view all the answers

What does the term 'Duty, Continuous' refer to in electrical operations?

Operation at a constant load indefinitely (D) Signup and view all the answers

What is the purpose of a Ground-Fault Circuit Interrupter (GFCI)?

To de-energize circuits for personnel protection (D) Signup and view all the answers

What does a grounding electrode accomplish?

It establishes an electrical connection to the earth. (C) Signup and view all the answers

What distinguishes a grounded conductor from a grounding conductor?

A grounded conductor is intentionally connected to ground. (C) Signup and view all the answers

Which of the following describes the term 'guarded'?

Covered or shielded for protection. (B) Signup and view all the answers

What is the main function of a grounding conductor?

To connect non-current-carrying metal parts to ground. (B) Signup and view all the answers

In wiring systems, what does the term 'grounded, effectively' imply?

Intentionally connected to earth. (A) Signup and view all the answers

What defines a handhole enclosure?

An enclosure for use in underground systems. (D) Signup and view all the answers

What does the term 'isolated' refer to in the context of locations?

Not readily accessible to persons. (D) Signup and view all the answers

What is the purpose of a receptacle?

To connect an attachment plug at an outlet. (A) Signup and view all the answers

What distinguishes a raintight construction?

It prevents entry of water when exposed to heavy rain. (D) Signup and view all the answers

In electrical systems, what is a service drop?

Service conductors from the utility pole to a building. (C) Signup and view all the answers

What does the term 'sealability' refer to in equipment?

The provision for locking or sealing to keep out contaminants. (C) Signup and view all the answers

What is defined as separately derived systems in electrical wiring?

Systems powered from an energy source independent of the primary source. (D) Signup and view all the answers

What is the function of service conductors?

To deliver power from the service point to the disconnecting means. (B) Signup and view all the answers

Which statement accurately describes a remote-control circuit?

It controls another circuit through a relay or similar device. (A) Signup and view all the answers

What does the term 'service equipment' refer to?

Circuit breaker(s), switch(es), and fuse(s) used for power management. (B) Signup and view all the answers

What is a signaling circuit?

An electric circuit that energizes signaling equipment. (B) Signup and view all the answers

What does a solar photovoltaic system do?

Converts solar energy into electricity through various components. (C) Signup and view all the answers

What is the purpose of a thermal protector in motors?

To protect the motor from overheating as an integral part. (A) Signup and view all the answers

What does 'ventilated' refer to in an electrical context?

Provided with a means to permit air circulation to remove excess heat. (B) Signup and view all the answers

What does a general-use switch control?

General distribution and branch circuits. (A) Signup and view all the answers

What characterizes a volatile flammable liquid?

It has a flash point below 38°C. (B) Signup and view all the answers

What is the function of a switchboard?

An assembly for mounting various electrical components. (D) Signup and view all the answers

What does 'thermally protected' mean when applied to motors?

The motor has a protective label indicating it is safeguarded against overheating. (B) Signup and view all the answers

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Study Notes

Circuit Breakers and Electrical Terms

Qualifying Terms: Used in electrical terminology to denote specific characteristics like delay (inverse time), adjustment capabilities (nonadjustable), and predetermined values (setting).
Concealed: Refers to equipment that is inaccessible due to structural components.
Conductors: Differentiated as bare (uninsulated), covered (with non-standard material), and insulated (recognized insulating material).
Conduit Body: A separate segment of conduit aiding in wiring systems.
Pressure Connector: A device for connecting multiple conductors without solder.
Continuous Load: Defined as a load expected to last for over three hours.

Electrical Devices and Equipment

Controller: Governs the operation of other electrical devices.
Cooking Unit: Refers to appliances specifically designed to be mounted on counters.
Coordination: Aims to limit electrical outages by localizing overcurrent conditions.
Cutout Box: An enclosure designed to mount on surfaces with doors that swing open.

Electrical Safety and Configuration

Dead Front: Equipment design ensuring live parts are not exposed.
Dusttight: Constructed to prevent dust intrusion, enhancing electrical safety.
Duties: Classified as continuous, intermittent, periodic, short-time, or varying based on operational patterns.

Dwelling and Building Terms

Dwelling Unit: A singular unit offering independent living facilities.
Guest Room vs. Guest Suite: Defined by the number of rooms and amenities included for accommodation.

Grounding and Protection

Grounding: Establishes an electrical connection with the earth to enhance safety.
Ground-Fault Circuit Interrupter (GFCI): Protects personnel by cutting off electrical flow in fault conditions.
Grounding Electrode: Connects an electrical system to the earth for safety.

Housing and Enclosure

Hoistway: Refers to vertical openings like shafts or hatchways.
Enclosure: Protective casing for electrical equipment, ensuring operational safety.
Explosionproof Apparatus: Designed to contain and withstand internal explosions.

Wiring Systems and Conductors

Service Conductors: Carry electricity from utility service points to building systems.
Service Drop: The segment of overhead electrical service conductors.
Sealable Equipment: Enclosed devices that can be sealed for security.

Miscellaneous Electrical Terms

Electric Sign: Illuminated equipment for advertisement purposes.
Remote-Control Circuit: Controls another circuit via relays.
Voltage: Measures the electrical potential in a circuit, essential for system function.
Utilization Equipment: Refers to devices consuming electrical energy for various applications.

Additional Considerations

Special Permission: Required written consent from regulatory authority for specific actions or installations.
Thermal Protections: Devices integral to motors preventing overheating and operational danger.

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