Temperature, Autoignition (AIT)

Temperature, Autoignition (AIT)

Definition(s)

Temperature, Autoignition (AIT)

The minimum temperature required to initiate or cause self-sustained combustion of a solid, liquid, or gas independently of the heating or heated element.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Seal, Explosionproof Conduit

Seal, Explosionproof Conduit

Definition(s)

Seal, Explosionproof Conduit

A sealing fitting, filled with a poured potting compound, designed to contain an explosion in the enclosure to which it is attached and to minimize passage of flammable gases or vapors from one location to another.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Seal, Explosionproof Cable

Seal, Explosionproof Cable

Definition(s)

Seal, Explosionproof Cable

A cable termination fitting filled with compound and designed to contain an explosion in the enclosure to which it is attached or to minimize passage of flammable gases or vapors from one location to another. An explosionproof conduit seal may also be used in combination with a cable termination fitting as an explosionproof cable seal.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Protection, Type of

Protection, Type of

Definition(s)

Protection, Type of

The specific measures applied to electrical apparatus to avoid ignition of a surrounding explosive atmosphere. Examples are “e” and “n.” Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Protection, Special

Protection, Special

Definition(s)

Protection, Special

An IEC protection technique other than those that have been standardized. This type of protection is referred to by IEC 60079-0 as “s.”. Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Pressurization, Type Z

Pressurization, Type Z

Definition(s)

Pressurization, Type Z

A method of reducing the classification within an enclosure from Division 2/Zone 2 to nonhazardous (unclassified). Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Pressurization, Type Y

Pressurization, Type Y

Definition(s)

Pressurization, Type Y

A method of reducing the classification within an enclosure from Division 1/Zone 1 to Division 2/Zone 2.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Pressurization, Type X

Pressurization, Type X

Definition(s)

Pressurization, Type X

A method of reducing the classification within an enclosure from Division 1/Zone 1 to nonhazardous (unclassified). Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Maintenance, Operational

Maintenance, Operational

Definition(s)

Maintenance, Operational

Any maintenance activity, excluding corrective maintenance, intended to be performed by the operator and required in order for the equipment to serve its intended purpose. Such activities typically include the correcting of zero on a panel instrument, changing charts, record keeping, adding ink, and the like.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Maintenance,Corrective

Maintenance,Corrective

Definition(s)

Maintenance,Corrective

Any maintenance activity that is not normal in the operation of equipment and requires access to the equipment's interior. Such activities are expected to be performed by a qualified person. Such activities typically include locating causes of faulty performance, replacement of defective components, adjustment of internal controls, and the like.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Line of Demarcation

Line of Demarcation

Definition(s)

Line of Demarcation

The “line of demarcation” means the dividing line used administratively to distinguish between the areas in which structures shall conform to Class “A” and Class “B” or “C” requirements.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Flameproof

Flameproof

Definition(s)

Flameproof

A type of protection of electrical apparatus in which an enclosure will withstand an internal explosion of a flammable mixture which has penetrated into the interior, without suffering damage and without causing ignition, through any joints or structural openings in the enclosure, of an external explosive atmosphere consisting of one or more of the gases or vapors for which it is designed. This type of protection is referred to as “d.”

  • NOTE: See also enclosure, explosionproof.
Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Facility, Manned

Facility, Manned

Definition(s)

Facility, Manned

A facility on which people are routinely accommodated for more than 12 hours per day.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Enclosure, Purged and Pressurized

Enclosure, Purged and Pressurized

Definition(s)

Enclosure, Purged and Pressurized

An enclosure supplied with clean air or an inert gas at sufficient flow and positive pressure to reduce to an acceptably safe level any flammable gas or vapor concentration initially present, and to maintain this safe level by positive pressure with or without continuous flow, see 4.3.5.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Enclosure, NEMA Type

Enclosure, NEMA Type

Definition(s)

Enclosure, NEMA Type

A United States (NEMA) system of rating standard levels of protection provided to electrical apparatus by enclosures for 1) the protection of persons against contact with live or moving parts inside the enclosure, 2) the protection provided by the enclosure against ingress of solids and/or liquids, 3) the protection provided by the enclosure against the deleterious effects of corrosion, and 4) the protection provided by the enclosure against damage to the formation of external ice. This enclosure type is in addition to (and not an alternative to) the types of protection necessary to ensure protection against ignition in hazardous (classified) locations, see Table 10.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Enclosure, Explosionproof

Enclosure, Explosionproof

Definition(s)

Enclosure, Explosionproof

An enclosure that is capable of withstanding an explosion of a gas or vapor within it and of preventing the ignition of an explosive gas or vapor that may surround it, and that operates at such an external temperature that a surrounding explosive gas or vapor will not be ignited thereby.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Device, Sealed

Device, Sealed

Definition(s)

Device, Sealed

A device so constructed that it cannot be opened during normal operational conditions or operational maintenance and is sealed to restrict entry of an external atmosphere. Such devices may be incorporated into equipment having the type of protection referred to as “nC.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Device, High-Temperature

Device, High-Temperature

Definition(s)

Device, High-Temperature

A device whose maximum operating temperature exceeds 80 % of the autoignition temperature in degrees Celsius (°C) of all the gas or vapor involved see 4.2.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Device, Hermetically Sealed

Device, Hermetically Sealed

Definition(s)

Device, Hermetically Sealed

Equipment sealed against the entrance of an external atmosphere where the seal is made by fusion, for example, soldering, brazing, welding, or the fusion of glass to metal.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Device, Arcing

Device, Arcing

Definition(s)

Device, Arcing

A device that, during its normal operation, produces an arc with sufficient energy to cause ignition of an ignitable mixture.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Conditions, Normal

Conditions, Normal

Definition(s)

Conditions, Normal

Equipment is generally considered to be under normal conditions when it conforms electrically and mechanically with its design specifications and is used within the limits specified by the manufacturer.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Circuit, Intrinsically Safe

Circuit, Intrinsically Safe

Definition(s)

Circuit, Intrinsically Safe

A circuit in which any spark or thermal effect is incapable of causing ignition of a mixture of flammable or combustible material in air under test conditions prescribed by ANSI/UL 913 and ANSI/ISA-60079-11.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Cable, TC-ER

Cable, TC-ER

Definition(s)

Cable, TC-ER

Power and control tray cable as defined by NEC Article 336. This cable is suitable for exposed runs (ER) between cable tray and utilization equipment where the cables are supported and secured. Reference NEC Article 336 for installation details.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Cable, PLTC-ER

Cable, PLTC-ER

Definition(s)

Cable, PLTC-ER

Type PLTC nonmetallic-sheathed, power-limited tray cable. Suitable for cable trays and consisting of a factory assembly of two or more insulated copper (solid or stranded) conductors suitable for 300 Volts, Nos. 22 through 12 AWG, under a nonmetallic jacket. The cable is resistant to the spread of fire, and the outer jacket is sunlight- and moisture-resistant as defined by NEC Article 725. This cable is suitable for exposed runs (ER) between cable tray and utilization equipment where the cables are supported and secured. Reference NEC Article 725 for installation details.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Cable, ITC-HL

Cable, ITC-HL

Definition(s)

Cable, ITC-HL

Type ITC instrumentation tray cable is a factory assembly of two or more 300V insulated copper conductors, Nos. 22 through 12 AWG, with or without grounding conductor(s), and enclosed in a nonmetallic sheath with or without an armor as defined by NEC Article 727. This cable is suitable for use in Class I Zones 1 and 2. Reference NEC Article 505 for installation details.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Cable, ITC-ER

Cable, ITC-ER

Definition(s)

Cable, ITC-ER

Type ITC instrumentation tray cable is a factory assembly of two or more 300V insulated copper conductors, Nos. 22 through 12 AWG, with or without grounding conductor(s), and enclosed in a nonmetallic sheath with or without an armor as defined by NEC Article 727. This cable is suitable for exposed runs (ER) between cable tray and utilization equipment where the cables are supported and secured.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Cable, Circuit Integrity

Cable, Circuit Integrity

Definition(s)

Cable, Circuit Integrity

Cable that is used for critical circuits to ensure survivability for continued circuit operation for a specified time under fire conditions. See 6.7.8 for recommended applications and cable selection.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Bus, Cable

Bus, Cable

Definition(s)

Bus, Cable

An approved assembly of insulated conductors with fittings and conductor terminations in a totally enclosed protective metal housing, see NEC Article 370.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Atmosphere, Explosive

Atmosphere, Explosive

Definition(s)

Atmosphere, Explosive

A mixture with air, under atmospheric conditions, of flammable substances in the form of gas, vapor, mist, or dust in which, after ignition, combustion spreads throughout the unconsumed mixture.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
AFCI

AFCI

Definition(s)

AFCI

Arc-fault circuit interrupter.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards

AFCI

A device intended to provide protection from the effects of arc faults by recognizing characteristics unique to arcing and by functioning to de-energize the circuit when an arc fault is detected.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards