Best Electrician Jobs - Glossary

A glossary of terms related to the electrical trades.

110 Block

High-density cross-connect block supporting both voice and data connections, offering better perform ...

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66 Block

Traditional terminal block used primarily for voice circuits, allowing quick cross-connection of tel ...

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AC Disconnect

Safety switch disconnecting inverter output from building electrical system, typically required by u ...

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Access Control Interface

Connection between fire alarm and access control systems to release secured doors during emergencies ...

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Access Credentials

Cards, fobs, or mobile devices containing encoded information for accessing secured areas through ca ...

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Addressable System

A fire alarm system where each device has a unique address, allowing precise identification of the t ...

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Alarm Keypad

User interface for arming, disarming, and controlling security systems, typically featuring LCD disp ...

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Amperage

The measure of electrical current flow, measured in amperes (A). Determines the size of conductors a ...

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Amplifier

Power amplification device for audio signals, requiring dedicated electrical circuits and proper gro ...

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Analog Input

Continuous variable signal (typically 4-20mA or 0-10V) from field devices measuring parameters like ...

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Annunciator

A remote display panel showing the status of the fire alarm system, typically located at building en ...

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Arc Flash

A dangerous release of energy caused by an electrical fault, creating intense heat and light. Proper ...

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Area of Refuge

A designated safe area where people unable to exit the building can wait for assistance, equipped wi ...

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Armored Cable

Type AC or MC cable with metal cladding protecting internal conductors. Provides physical protection ...

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Audio Amplifier

Device powering speakers in voice evacuation systems, providing adequate audio power for emergency m ...

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Audio DSP

Digital Signal Processor for audio optimization, requiring proper network integration, power supply, ...

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AV Bridge

Interface device connecting AV systems to IT networks, requiring proper network configuration, power ...

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AV Rack

Standardized mounting system for AV equipment, requiring proper ventilation, power distribution, and ...

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Backbone Cabling

Primary network cabling connecting telecommunications rooms, equipment rooms, and entrance facilitie ...

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Backplane

Physical rack providing power and communication pathways between PLC modules through a built-in circ ...

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Badge Printer

Specialized printer for creating photo ID badges and access cards, including encoding capabilities f ...

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Battery Backup

Secondary power source required for fire alarm systems, typically providing 24 or 72 hours of standb ...

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Battery Bank

Energy storage system using multiple batteries to store excess solar power for use during nights or ...

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BDA System

Bi-Directional Amplifier system ensuring reliable radio communication for emergency responders withi ...

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Beam Detector

Smoke detection device using a beam of light across large spaces, ideal for warehouses and atriums.

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Bonding

The permanent joining of metallic parts to form an electrically conductive path, ensuring a continuo ...

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Busbar

A metallic strip or bar used in electrical distribution to carry substantial currents to multiple ci ...

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Bypass Diode

Component in solar panels that prevents hot spots and power loss when cells are shaded or damaged.

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Cable Certification

Process of testing installed cabling to verify compliance with industry standards and performance sp ...

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Cable Management

System of guides, troughs, and accessories organizing cables within racks and pathways for proper ai ...

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Cable Pulling

Process of installing cables through building pathways using proper techniques to prevent damage and ...

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Cable Shield

Protective covering for AV cables requiring proper grounding methods and termination techniques to p ...

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Cable Tester

Device used to verify proper termination, continuity, and performance characteristics of installed n ...

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Cable Tray

Overhead or under-floor support system for organizing and routing network and power cables throughou ...

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Candela Rating

Measurement of light intensity for strobes, determining coverage area and compliance with ADA requir ...

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Capacitor

A component that stores electrical energy in an electric field. Used for power factor correction, sm ...

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Card Reader

Device that reads credentials from access cards or fobs, communicating with the access control panel ...

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Cat6A Cable

Augmented Category 6 cable supporting 10 Gigabit Ethernet up to 100 meters with improved crosstalk p ...

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Cellular Communicator

Backup or primary communication device using cellular networks to report alarms and system status to ...

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Charge Controller

Regulates voltage and current from solar panels to batteries, preventing overcharging and optimizing ...

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Circuit Breaker

An automatic electrical switch designed to protect an electrical circuit from damage caused by overc ...

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Class A Wiring

A wiring method providing a redundant path for signals, maintaining communication even if a single b ...

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Class B Wiring

A wiring method with a single path for signals, supervised but without redundancy, commonly used in ...

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CO Detector

Device detecting carbon monoxide gas, often integrated with fire detection systems for comprehensive ...

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Cold Aisle

Contained aisle where cooled air is supplied to server rack intakes, maintaining optimal operating t ...

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Combiner Box

Junction box combining multiple solar panel strings into one main output, often containing fuses and ...

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Conductor

Material that allows electrical current to flow easily, typically copper or aluminum wire used to ca ...

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Conduit

A tube or channel that protects and routes electrical wiring through a building. Can be metal (EMT) ...

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Contactor

An electrically controlled switch used for switching power circuits, commonly found in industrial mo ...

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Control Interface

Hardware connection points for system control, including relay contacts, IR emitters, and serial con ...

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Control Module

Addressable device providing supervised outputs for controlling building functions and equipment.

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Control Processor

Central brain of AV system automation, requiring network connectivity, reliable power supply, and in ...

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Conventional System

A fire alarm system where devices are connected in zones rather than individually addressable, typic ...

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Core Switch

Central network switch handling high-speed traffic between different areas of the network, requiring ...

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CPU Module

Central Processing Unit of the PLC system that executes the control program and manages communicatio ...

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CRAH Unit

Computer Room Air Handler providing precise temperature and humidity control for data center environ ...

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DACT

Digital Alarm Communicator Transmitter - device that sends fire alarm signals to a central monitorin ...

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Data Table

Memory organization structure in PLCs storing I/O states, timer/counter values, and program variable ...

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DC Disconnect

Safety switch that disconnects DC power between solar panels and inverter, required for maintenance ...

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DCIM

Data Center Infrastructure Management software monitoring power, cooling, and equipment status in re ...

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Digital Input

Binary (on/off) signal from field devices like limit switches, pushbuttons, or proximity sensors.

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Digital Mixer

Audio mixing console requiring network connectivity, proper power supply, and integration with audio ...

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Disconnect Switch

A mechanical switching device used to isolate electrical equipment for maintenance or emergency shut ...

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Display Mount

Structural support system for mounting displays to walls or ceilings, requiring proper backing and c ...

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Door Contact

Magnetic switch that monitors door position, alerting when protected doors are opened without author ...

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Door Controller

Interface module between the access control panel and door hardware, managing locks, sensors, and re ...

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Duct Detector

A smoke detector installed in HVAC ductwork to detect smoke in air handling systems, typically contr ...

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Duress Button

Concealed panic button that silently signals an emergency situation to monitoring personnel or law e ...

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Electric Strike

Electronically controlled door locking mechanism that releases when valid credentials are presented ...

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Elevator Recall

System function returning elevators to designated landing upon fire alarm activation for occupant sa ...

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EMT

Electrical Metallic Tubing - thin-walled conduit used to protect and route electrical conductors. Co ...

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Energy Storage

System storing excess solar energy for later use, including batteries, management systems, and contr ...

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Environmental Monitoring

System tracking temperature, humidity, and other environmental conditions affecting equipment operat ...

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EOL Resistor

End-of-Line Resistor - provides supervision of conventional circuits by maintaining a specific resis ...

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EPO System

Emergency Power Off system providing rapid shutdown of power systems in emergency situations, requir ...

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Equipment Shelf

Rack-mounted support platform for AV equipment, requiring proper weight capacity, ventilation space, ...

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Ethernet/IP

Industrial network protocol using standard Ethernet hardware for communication between PLCs, HMIs, a ...

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FACP

Fire Alarm Control Panel - the central hub that monitors inputs from initiating devices and controls ...

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Fiber Backbone

High-capacity fiber optic cabling connecting different areas of the facility, providing primary data ...

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Fiber Enclosure

Rack-mounted housing protecting fiber optic splices and connections, including splice trays and cabl ...

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Fiber Optic Cable

Cable containing glass or plastic fibers that transmit data using light pulses, offering high bandwi ...

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Fiber Splice

Permanent junction between two fiber optic cables, typically performed using fusion or mechanical sp ...

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Fiber Tray

Rack-mounted enclosure for organizing and protecting fiber optic cables, splices, and connections.

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Finger Safe

Design feature preventing accidental contact with electrical components, typically through protectiv ...

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Fire Alarm Log

Required record of all system events, tests, and maintenance activities maintained by building perso ...

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Fire Alarm Runner

Personnel assigned to investigate fire alarm activations and coordinate with emergency responders du ...

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Fire Command Center

A room containing fire alarm controls, communication systems, and building systems controls for emer ...

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Fire Phone

Emergency telephone system within a building allowing communication between emergency responders dur ...

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Fire Sprinkler Monitor

A device monitoring the status of fire sprinkler systems, including water flow switches and valve ta ...

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Fish Tape

A long, flexible metal strip used to route electrical wiring through conduit or walls. Essential for ...

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Function Block

Pre-programmed routine performing specific control functions like timers, counters, or PID control, ...

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Generator Backup

Emergency power system providing long-term backup power during utility outages, including fuel syste ...

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GFCI

Ground Fault Circuit Interrupter - a device that quickly breaks electrical circuits when it detects ...

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Glass Break Detector

Acoustic sensor that recognizes the specific frequency of breaking glass, providing perimeter protec ...

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Graphic Annunciator

Display panel showing building layout with LED indicators for device locations and system status.

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Ground Bar

Copper bar providing common grounding point for telecommunications equipment and cable shields in ne ...

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Ground Mount

Solar array mounting system installed on the ground, often used for larger installations or when roo ...

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Ground Wire

A wire that provides a path to earth for electrical current, protecting against shocks and equipment ...

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Grounding Electrode

A metal rod or other device buried in the earth to establish a direct electrical connection to groun ...

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Grounding System

Common ground reference system for equipment and racks, including mesh bonding network and ground ba ...

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Harmonics

Distortions in the normal electrical sine wave caused by non-linear loads, potentially causing equip ...

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HDA

Horizontal Distribution Area serving as connection point between backbone and horizontal cabling to ...

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HDBaseT

Technology for transmitting HD video, audio, power, and control signals over CAT cable, requiring sp ...

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Heat Detector

A device that detects abnormal temperature rises or fixed temperature thresholds, commonly used in a ...

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HMI

Human Machine Interface - touchscreen or display panel providing operator control and monitoring of ...

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Horn Strobe

A combination device that provides both audible and visual notification of fire alarm conditions, me ...

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Hot Aisle

Contained aisle in data center where equipment exhaust heat is collected and removed, part of effici ...

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IDF

Intermediate Distribution Frame - a location within a building where cables terminate and network eq ...

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Input Module

Hardware component that receives signals from field devices like sensors, switches, and transmitters ...

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Intercom

Communication device allowing visitors to request entry and speak with building occupants before acc ...

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Inverter

Device that converts DC power from solar panels into AC power for home use or grid connection, avail ...

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IP Camera

Digital video camera that transmits data over an IP network, offering high resolution and advanced f ...

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IR Sensor

Infrared receiver for remote control systems requiring proper placement, wiring methods, and integra ...

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Isolation Module

A device that isolates sections of an SLC during short circuit conditions, maintaining operation of ...

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J-Hook

J-shaped support hardware for hanging and routing low-voltage cables when cable tray or conduit is n ...

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Junction Box

Weatherproof enclosure protecting electrical connections between solar components, containing termin ...

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Key Fob

Small, portable device containing encoded access credentials, offering convenient alternative to tra ...

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Knockout

A partially punched opening in electrical boxes and enclosures that can be removed to allow conduit ...

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Ladder Logic

Graphical programming language for PLCs that resembles electrical relay logic diagrams, using contac ...

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LC Connector

Small form-factor fiber optic connector commonly used in high-density applications and modern networ ...

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Load Center

Main electrical panel where solar system connects to building power, containing circuit breakers for ...

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Lockout/Tagout

Safety procedure ensuring dangerous machines are properly shut off and prevented from starting up du ...

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Loop Card

Circuit board in the FACP providing connections and processing for a signaling line circuit of addre ...

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Mag Door Holder

Electromagnetic device holding fire doors open, releasing upon fire alarm activation to maintain fir ...

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Magnetic Lock

Electromagnetic locking device providing up to 1200lbs holding force, securing doors through direct ...

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MC4 Connector

Industry-standard weatherproof connector for connecting solar panels to other system components.

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MDA

Main Distribution Area housing core networking equipment and primary connections to service provider ...

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MDF

Main Distribution Frame - the primary telecommunications equipment room where external services ente ...

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Mega Meter

An instrument used to measure electrical insulation resistance, typically operating at high voltages ...

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Memory Module

Removable storage device for PLC programs and data, allowing program backup and transfer between sys ...

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Microinverter

Small inverter attached to individual solar panels, converting DC to AC at the panel level for impro ...

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Mini Horn

Compact audible notification appliance for areas requiring lower sound output or limited space insta ...

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Modbus

Standard industrial communication protocol allowing PLCs to communicate with various devices and sys ...

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Monitor Module

Addressable device providing supervised inputs for monitoring contact closures and other devices.

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Monitoring System

Software and hardware tracking solar system performance, energy production, and potential issues in ...

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Motion Detector

Sensor using PIR (Passive Infrared) or microwave technology to detect movement in protected areas, t ...

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Motor Starter

Electromechanical device controlled by PLC outputs to start/stop motors, including overload protecti ...

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Multimeter

A measuring instrument that combines multiple measurement functions including voltage, current, and ...

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NAC Extender

A power supply that provides additional notification appliance circuits, expanding system capacity f ...

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NAC

Notification Appliance Circuit - provides power and control to notification devices like strobes and ...

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Net Meter

Bidirectional electric meter that tracks both power consumed from grid and excess power sent back, e ...

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Network Camera

IP-based surveillance camera that connects directly to data networks for video transmission and remo ...

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Network Card

Module allowing multiple fire alarm control panels to communicate and function as a single system.

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Network Rack

Standardized frame or enclosure for mounting multiple equipment units, typically 19 inches wide and ...

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Neutral Wire

The return path for current in an electrical circuit, typically white or gray in color. Carries curr ...

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NVR

Network Video Recorder - records and manages video from IP cameras, providing storage, playback, and ...

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OPC Server

Software interface providing standardized data exchange between PLCs and other industrial software a ...

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OTDR

Optical Time Domain Reflectometer - testing device used to characterize optical fiber by analyzing r ...

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Output Module

Hardware component that sends control signals from the PLC to field devices like motors, valves, and ...

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Panel Board

An electrical distribution board containing circuit breakers or fuses, used to divide electrical pow ...

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Patch Bay

Connection point for audio and video signals, requiring proper labeling, grounding, and integration ...

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Patch Panel

Organized termination point for network cables, facilitating connections and changes between network ...

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PDU

Power Distribution Unit providing managed power distribution to rack equipment, including monitoring ...

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Phase

A distribution system for AC power. Single-phase has two wires, while three-phase has three wires, e ...

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PID Control

Proportional-Integral-Derivative control algorithm used for precise process control of variables lik ...

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Plenum Cable

Special cable rated for installation in air-handling spaces, featuring fire-resistant properties and ...

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PoE Switch

Network switch providing Power over Ethernet to IP cameras, card readers, and other security devices ...

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PoE

Power over Ethernet - technology enabling power delivery through network cables to devices like phon ...

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Power Conditioner

Specialized power distribution providing clean power to sensitive AV equipment, including surge prot ...

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Power Factor

The ratio between real and apparent power in an AC circuit, indicating how effectively electrical po ...

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Power Monitoring

System tracking power usage, quality, and efficiency throughout the facility, including branch circu ...

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Power Optimizer

DC-to-DC converter attached to solar panels to maximize energy harvest by tracking maximum power poi ...

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Power Supply

Module providing regulated DC power to the PLC system, often including battery backup for memory ret ...

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Production Meter

Meter specifically measuring total solar system power production, often required for incentive progr ...

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Profibus

Fieldbus communication protocol for high-speed data exchange between PLCs and field devices in indus ...

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Programming Tool

Software and hardware used to configure addressable fire alarm systems and device parameters.

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Projection Screen

Motorized or fixed viewing surface requiring proper mounting support, power for motors, and control ...

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Proximity Reader

Contactless card reader using RFID technology to read credentials when they are held within detectio ...

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PTZ Camera

Pan-Tilt-Zoom camera for video conferencing or recording, requiring PoE or power supply, network con ...

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Pull Box

An enclosure installed in a conduit run to facilitate wire pulling and provide access for maintenanc ...

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Pull Station

A manually operated device that allows building occupants to trigger the fire alarm system by pullin ...

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Punch Down Tool

Hand tool used to terminate voice and data cables on punch down blocks and patch panels, ensuring pr ...

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Raceway

An enclosed channel designed specifically to hold and protect electrical wires and cables, providing ...

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Racking System

Mounting structure that secures solar panels to roofs or ground mounts, designed to withstand local ...

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Raised Floor

Elevated floor system providing space for power distribution, cooling, and cable management in data ...

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Rapid Shutdown

Safety system required by NEC to quickly de-energize solar panels at module level in emergency situa ...

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Record of Completion

Required documentation certifying proper system installation and testing according to NFPA standards ...

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Relay Module

An addressable device providing dry contact closure for controlling auxiliary equipment or integrati ...

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Relay

An electrically operated switch that uses an electromagnet to mechanically operate a set of contacts ...

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Remote I/O

Input/Output modules located away from the main PLC, connected via network communication to reduce w ...

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Remote Power Supply

Additional power source for notification appliances or other devices located far from the main FACP.

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Remote Test Station

A device allowing testing of duct detectors or other hard-to-reach devices from an accessible locati ...

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Request to Exit

Motion sensor or pushbutton that allows people to exit through secured doors without triggering alar ...

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Resistance

The opposition to current flow in an electrical circuit, measured in ohms (Ω). Higher resistance res ...

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RJ45 Connector

Eight-pin connector used for terminating twisted pair cable in Ethernet networks, following TIA/EIA- ...

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Rung

Single line of ladder logic programming containing input conditions and output instructions, similar ...

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Safety PLC

Specialized PLC designed for safety-critical applications, featuring redundant processing and fail-s ...

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SCADA

Supervisory Control and Data Acquisition - system for monitoring and controlling multiple PLCs and p ...

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Security Panel

Central control unit for intrusion detection systems, monitoring sensors and controlling alarm commu ...

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Sensor Input

Devices providing process feedback to PLC inputs, including temperature sensors, pressure transmitte ...

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Sequence of Operations

Matrix defining system responses to various input conditions, guiding system programming and testing ...

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Server Rack

Standardized 19-inch frame for mounting servers, network equipment, and accessories. Typically 42U i ...

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Service Entrance

The point where electrical service conductors enter a building, including the service head, meter ba ...

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Short Circuit

A dangerous condition where current flows through an unintended path with very low resistance, poten ...

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Signal Extender

Device for extending AV signals over long distances, requiring proper cable type, power supply, and ...

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SLC

Signaling Line Circuit - a communication path between the FACP and addressable devices, carrying bot ...

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Smoke Control Panel

Control interface for smoke management systems, often integrated with the main fire alarm system.

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Smoke Control

Systems controlling building HVAC to manage smoke movement during fires, often integrated with the f ...

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Smoke Detector

A device that detects smoke particles in the air using either photoelectric or ionization technology ...

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Solar Controller

Device managing power flow between solar panels, batteries, and loads in off-grid or hybrid systems.

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Solar Optimizer

Module-level power electronics that maximize each panel's output by adjusting voltage and current in ...

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Solar Panel

Photovoltaic module that converts sunlight into electrical energy, typically made of silicon cells p ...

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Speaker System

Audio output devices including proper mounting, impedance matching, and wire gauge selection for opt ...

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Speaker Wire

Specialized audio cable requiring proper gauge selection, installation methods, and termination tech ...

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Static Transfer Switch

High-speed switch automatically transferring critical loads between power sources without interrupti ...

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String Inverter

Central inverter converting DC power from multiple solar panels connected in series (strings) to AC ...

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Structured Text

High-level text-based programming language for PLCs, similar to Pascal, used for complex mathematica ...

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Surge Protector

A device designed to protect electrical equipment from voltage spikes by diverting excess voltage to ...

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Surge Suppressor

Device protecting fire alarm system components from electrical surges and lightning strikes.

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Synchronization

The coordination of multiple notification appliances to flash and sound in unison, preventing disori ...

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Thermography

The use of infrared imaging to detect heat patterns in electrical systems, useful for identifying po ...

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Tone Generator

Testing tool that sends an audible signal through cables to help identify and trace specific circuit ...

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Touch Panel

Wall-mounted or tabletop control interface requiring power, data, and proper mounting box installati ...

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Transfer Switch

Device automatically switching between solar, battery, and grid power sources in hybrid systems.

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Transformer

A device that transfers electrical energy between circuits through electromagnetic induction, often ...

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UPS System

Uninterruptible Power Supply providing battery backup and power conditioning for critical network eq ...

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Valve Tamper

A switch monitoring the position of fire sprinkler control valves, alerting when valves are closed o ...

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VESDA

Very Early Smoke Detection Apparatus providing early warning of potential fire conditions in critica ...

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VFD

Variable Frequency Drive - electronic device controlled by PLC to adjust motor speed and torque by v ...

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Video Analytics

Software that analyzes video feeds to detect specific events or behaviors, such as motion in restric ...

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Video Management

Software platform for managing multiple cameras, recordings, and user access to the video surveillan ...

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Video Matrix

Central switching system for routing multiple video sources to multiple displays, requiring structur ...

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Video Projector

Image projection device requiring specialized mounting, dedicated power, proper ventilation, and sig ...

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Video Scaler

Processing device for video format conversion, requiring proper mounting, power supply, and signal c ...

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Voice Evacuation

A system providing pre-recorded or live voice messages during emergencies, offering specific instruc ...

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VOIP Phone

Voice over IP telephone that connects to data networks, requiring proper PoE and VLAN configuration ...

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Voltage Drop

The reduction in voltage along a conductor carrying current, important in wire sizing and circuit de ...

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Voltage

The electrical pressure or potential difference between two points in a circuit. Measured in volts ( ...

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WAP

Wireless Access Point - device providing wireless network connectivity to end users, requiring struc ...

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Water Flow Switch

A device that detects water movement in sprinkler pipes, indicating sprinkler activation or system t ...

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Weather Station

Sensors measuring environmental conditions affecting solar production including irradiance, temperat ...

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Wire Connector

A device used to join two or more electrical conductors together securely, such as wire nuts or crim ...

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Wire Gauge

A standardized measurement system for wire diameter, commonly using AWG (American Wire Gauge). Lower ...

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Wire Loom

Cable management system protecting and organizing AV cables, requiring proper support methods and se ...

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Wire Stripper

A hand tool designed to safely remove insulation from electrical wires without damaging the conducto ...

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Wireless Mic

Radio frequency microphone system requiring antenna installation, frequency coordination, and proper ...

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Zone Module

A device allowing conventional devices to be connected to an addressable system, maintaining zone id ...

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