Alaska Low Voltage Practice key terms

In Alaska, electrical work involving circuits of 24 volts or less and limited energy, such as communications, signaling, and control wiring, which is regulated separately from general electrical contracting.

An individual who holds a state-issued license to supervise electrical work for a contractor, responsible for ensuring that regulated work complies with Alaska statutes and adopted electrical codes.

The regulatory process in which a contractor obtains authorization before beginning regulated electrical work and the completed work is examined by an authority for code compliance.

The organization, office, or individual responsible for approving equipment, installations, and procedures, and for enforcing code requirements within a given jurisdiction.

A widely adopted model code that sets minimum requirements for electrical installations, including wiring methods, grounding, and protection, and is commonly enforced through state and local adoption.

Wiring systems that carry restricted amounts of energy for signaling, communications, or control, and are governed by specific code articles rather than general power wiring rules.

A circuit whose power source is limited in voltage and current so that it presents a low fire and shock hazard, allowing less restrictive wiring methods than line-voltage circuits.

A safety procedure in which energy sources are physically locked and marked with tags before work begins, preventing accidental energization or release of stored energy.

Clothing and gear such as gloves, eye protection, and insulated tools worn to reduce injury risk from electrical, chemical, and physical hazards on the job site.

A sudden, high-energy electrical discharge through air that produces intense heat, light, and pressure, capable of causing severe burns and injury to nearby workers.

A work area with limited entry and exit that is not designed for continuous occupancy, requiring hazard evaluation and often an attendant before entry is permitted.

Systems and practices, such as harnesses, guardrails, and lanyards, used to prevent or arrest falls when working at heights like ladders, roofs, and elevated platforms.

The relationship stating that voltage equals current multiplied by resistance, allowing any one value to be calculated when the other two are known in a circuit.

The relationship describing electrical power as the product of voltage and current, used to size conductors, sources, and protective devices for a load.

The loss of voltage along a conductor caused by its resistance, which reduces the voltage delivered to equipment and must be limited for reliable operation.

Electrical current that periodically reverses direction, typically in a sine wave, and is the standard form of power delivered by utilities to buildings.

Electrical current that flows continuously in one direction, commonly produced by batteries and power supplies and used by many electronic and security devices.

The total opposition a circuit presents to alternating current, combining resistance with reactance, and affecting signal quality and power transfer in cabling systems.

A device or circuit that converts alternating current into direct current, often used in power supplies that feed low voltage equipment and control systems.

A standardized measure of wire size, such as AWG, that determines current capacity, resistance, and suitability for a given circuit length and load.

The inherent impedance of a cable or transmission line, which must match connected equipment to prevent signal reflections and loss in high-frequency data cabling.

Twisted-pair copper cable manufactured and rated to specific performance categories, such as Cat 5e, Cat 6, or Cat 6A, for supporting defined data transmission speeds.

Cable with jacketing and insulation rated for use in air-handling spaces, producing limited smoke and flame spread when exposed to fire.

Cable rated for installation in vertical shafts between floors, designed to resist flame propagation while not meeting the stricter smoke requirements of plenum spaces.

A classification indicating how a cable behaves in a fire, based on flame spread and smoke production, and used to select cable appropriate for a given building space.

A standardized, organized approach to building telecommunications wiring that separates cabling into subsystems and supports a wide range of voice and data applications.

The cabling that runs from a telecommunications room to individual work area outlets, typically installed within ceilings, walls, or conduit on a single floor.

A rack-mounted panel of terminated ports that provides a central point for cross-connecting horizontal cabling to network switches and equipment.

A termination device with metal clips that accept solid copper conductors, used to connect and organize cabling in telecommunications and cross-connect installations.

The process of attaching a conductor or cable to a connector, jack, or terminal so that a reliable electrical and mechanical connection is made.

Verification of installed cabling performance using instruments that measure continuity, length, and transmission characteristics to confirm compliance with standards.

A fire alarm system in which each device has a unique address, allowing the panel to identify the specific device in alarm or trouble and speed response.

A component such as a smoke detector, heat detector, or manual pull station that senses a fire condition and sends a signal to the fire alarm control panel.

A device such as a horn, strobe, or speaker that alerts occupants of a fire emergency through audible, visible, or voice signals.

The central unit that monitors initiating devices, processes signals, activates notification appliances, and reports system status and trouble conditions.

A security system that regulates who may enter an area by verifying credentials such as cards, codes, or biometrics and controlling locks or barriers electronically.

A device that reads credentials from a card or fob and transmits the data to an access control system for authorization decisions.

An electric lock that releases when power is removed, typically used on egress doors so occupants can exit during a power loss or fire alarm.

A device such as a push button or motion sensor that signals the access control system to release a lock so a person can exit freely.

A passive device that converts between balanced and unbalanced signals, often used to transmit audio or video over twisted-pair cabling instead of coaxial cable.

A differential serial communications standard supporting long cable runs and multiple devices on a shared bus, widely used for building automation and control systems.

A networked control system that monitors and manages building equipment such as HVAC, lighting, and energy systems to maintain comfort and efficiency.

A continuously variable signal whose value represents a physical quantity, commonly used by sensors and controllers to convey temperature, pressure, or position.

A signal that takes on discrete values, typically representing binary states such as on or off, used for switching and data communication in control systems.

A test instrument that sends a pulse down a cable and analyzes reflections to locate opens, shorts, and impedance changes along the run.

A check that verifies an electrical path exists through a conductor or connection with low resistance, often performed with a meter before energizing equipment.

A pair of test tools used to identify and trace a specific cable among many by injecting a signal at one end and detecting it with a probe.

A device that provides backup power from a battery to connected equipment during outages or voltage disturbances, protecting systems from data loss and shutdown.