This article provides a clear overview of key terms such as identified equipment, increased safety standards, industrial control panels, and more, offering insights into their roles and applications within electrical installations.
Whether you’re working on design, installation, or maintenance, having a solid grasp of these concepts is crucial for effective system operation and protection.
- Identified (as applied to equipment)
Equipment recognized as suitable for its specific purpose, function, use, or environment. This suitability may be verified through testing laboratories, inspection agencies, or other evaluating organizations. (CMP—1)- Informational Note: Equipment can be deemed suitable by qualified testing laboratories (e.g., listing, labeling) or other product evaluation organizations.
- In Sight From (Within Sight From)
Equipment visible and within 15 meters (50 feet) of other equipment is considered «in sight from» that equipment. (CMP—1)- Informational Note: Refer to 110.29 for more details.
- Increased Safety «e»
Protection type for electrical equipment that prevents arcs or sparks in normal operation and under specified abnormal conditions. It ensures security against excessive temperatures and the occurrence of arcs and sparks. (CMP—14)- Informational Note: See ANSI/UL 60079-7 for further information.
- Induction Heating (Induction Melting, Induction Welding)
The process where a conductive material heats, melts, or welds due to its own I2R losses in a varying electromagnetic field. (665) (CMP—12) - Industrial Control Panel
An assembly of components (power circuit or control circuit) mounted on or within an enclosure or subpanel, excluding controlled equipment. (CMP—11) - Industrial Installation, Supervised
An industrial facility where qualified personnel supervise the premises wiring system, which involves significant industrial load and high voltage levels. (240) (CMP—10) - Information Technology Equipment (ITE)
Equipment rated 1000 volts or less, commonly found in office environments and used for data creation, manipulation, and related signals. (CMP—12)- Informational Note: See UL 60950-1 for listing requirements.
- Information Technology Equipment Room
A room housing the equipment related to information technology within a designated area. (CMP—12) - Innerduct
A nonmetallic raceway placed inside a larger raceway. (CMP—16) - Insulated Bus Pipe (IBP)
A conductor with solid insulation, conductive grading layers, and a grounding layer embedded in the insulation, typically called a tubular covered conductor (TCC). (CMP—8) - Insulated Bus Pipe System
An assembly containing bus pipes, connectors, and associated fittings. (CMP—8) - Insulating End
An insulator designed to electrically isolate the end of a flat conductor cable (Type FCC). (324) (CMP—6) - Interactive Mode
Operating mode for power production equipment or microgrids that can deliver energy to an electric power network or primary source. (CMP—4)- Informational Note: Equipment like interactive inverters operates in this mode.
- Interrupting Rating
The highest current at a rated voltage that a device can interrupt under standard test conditions. (CMP—10) - Intersystem Bonding Termination (IBT)
A device connecting intersystem bonding conductors from communications systems to the grounding electrode system. (CMP—16) - Intrinsic Safety «i»
A protection type ensuring no spark or thermal effect can ignite flammable materials under specific test conditions. (CMP—14)- Informational Note: See ANSI/UL 913 for more details.
- Intrinsically Safe Apparatus
Equipment in which all circuits are intrinsically safe and cannot cause ignition of hazardous materials. (CMP—14)- Informational Notes: Refer to ANSI/UL 913 and ANSI/ISA RP 12.06.01 for additional information.
- Intrinsically Safe Circuit
A circuit where sparks or thermal effects cannot ignite flammable materials under prescribed test conditions. (CMP—14)- Informational Note: See ANSI/UL 913 for test conditions.
- Intrinsically Safe Circuits, Different
Intrinsically safe circuits where potential interconnections are not evaluated as intrinsically safe. (CMP—14) - Intrinsically Safe System
A system including interconnected intrinsically safe apparatus, circuits, and cables, specifically designed for hazardous locations. (CMP—14)- Informational Notes: See ANSI/UL 913, ANSI/UL 60079-11, and ANSI/ISA RP 12.06.01 for installation and further information.
- Invasive Procedure
A medical procedure that penetrates the protective surfaces of a patient’s body, excluding certain non-invasive procedures like intravenous insertions. (517) (CMP—15) - Inverter
Equipment designed to convert direct current (DC) to alternating current (AC). (CMP—4) - Inverter, Interactive
An inverter capable of operating in interactive mode, delivering energy to an external power system. (CMP—13) - Inverter, Multimode
An inverter that can operate both in interactive and island modes. (CMP—4) - Inverter, Stand-alone
An inverter designed to operate only in island mode, isolated from external power systems. (CMP—4) - Inverter Input Circuit
The conductors connected to the DC input of an inverter. (CMP—13) - Inverter Output Circuit
The conductors connected to the AC output of an inverter. (CMP—13) - Inverter Utilization Output Circuit
The conductors between a multimode or stand-alone inverter and the utilization equipment. (706) (CMP—13) - Irrigation Machine
An electrically driven or controlled machine used for distributing water for agricultural purposes. (675) (CMP—7) - Irrigation Machine, Center Pivot
A multi-motor irrigation system revolving around a central pivot for efficient water distribution. (675) (CMP—7) - Island Mode
Operating mode where energy is supplied to loads disconnected from the primary electric network or power source. (CMP—4) - Isolated (as applied to location)
A location not readily accessible to people unless special access methods are employed. (CMP—1) - Isolated Power System
A system involving an isolation transformer and ungrounded circuit conductors. (517) (CMP—15) - Isolation Transformer
A transformer with primary and secondary windings separated physically, used to isolate circuits for safety purposes. (517) (CMP—15)
Summary Table
| Term | Definition |
|---|---|
| Identified | Equipment suitable for its specific purpose or function. (CMP—1) |
| In Sight From | Equipment visible and within 15 meters of other equipment. (CMP—1) |
| Increased Safety «e» | Protection type preventing arcs or sparks under abnormal conditions. (CMP—14) |
| Induction Heating | Heating or melting of conductive materials in a varying electromagnetic field. (CMP—12) |
| Industrial Control Panel | An assembly of power or control circuit components in an enclosure. (CMP—11) |
| Industrial Installation, Supervised | Industrial facility supervised with specific qualifications and requirements. (CMP—10) |
| Information Technology Equipment (ITE) | Equipment used for data creation and manipulation in offices. (CMP—12) |
| Information Technology Equipment Room | A room housing IT equipment in a designated area. (CMP—12) |
| Innerduct | Nonmetallic raceway placed inside a larger raceway. (CMP—16) |
| Insulated Bus Pipe (IBP) | A conductor with solid insulation and conductive layers. (CMP—8) |
| Insulated Bus Pipe System | Assembly with bus pipes, connectors, and accessories. (CMP—8) |
| Insulating End | Insulator for isolating flat conductor cable ends. (CMP—6) |
| Interactive Mode | Mode where equipment delivers energy to the grid. (CMP—4) |
| Interrupting Rating | The maximum current a device can interrupt at rated voltage. (CMP—10) |
| Intersystem Bonding Termination (IBT) | Device connecting intersystem bonding conductors to the grounding system. (CMP—16) |
| Intrinsic Safety «i» | Protection preventing sparks or thermal effects from igniting flammable materials. (CMP—14) |
| Intrinsically Safe Apparatus | Apparatus with intrinsically safe circuits that cannot cause ignition. (CMP—14) |
| Intrinsically Safe Circuit | A circuit incapable of igniting flammable materials under test conditions. (CMP—14) |
| Intrinsically Safe Circuits, Different | Intrinsically safe circuits with unverified interconnections. (CMP—14) |
| Intrinsically Safe System | An assembly of intrinsically safe apparatus and circuits for hazardous locations. (CMP—14) |
| Invasive Procedure | Procedure that penetrates protective body surfaces. (CMP—15) |
| Inverter | Equipment converting DC to AC. (CMP—4) |
| Inverter, Interactive | Inverter that operates in interactive mode. (CMP—13) |
| Inverter, Multimode | Inverter that can operate in both interactive and island modes. (CMP—4) |
| Inverter, Stand-alone | Inverter that operates only in island mode. (CMP—4) |
| Inverter Input Circuit | Conductors connected to the DC input of an inverter. (CMP—13) |
| Inverter Output Circuit | Conductors connected to the AC output of an inverter. (CMP—13) |
| Inverter Utilization Output Circuit | Conductors between inverter and utilization equipment. (CMP—13) |
| Irrigation Machine | Electrically driven machine used for agricultural water distribution. (CMP—7) |
| Irrigation Machine, Center Pivot | Multi-motor irrigation system revolving around a central pivot. (CMP—7) |
| Island Mode | Operating mode supplying energy to disconnected loads. (CMP—4) |
| Isolated (Location) | Location not easily accessible without special access. (CMP—1) |
| Isolated Power System | System with an isolation transformer and ungrounded circuit conductors. (CMP—15) |
| Isolation Transformer | A transformer with physically separated primary and secondary windings. (CMP—15) |
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