IFC (IFC4X3_ADD2) under development Pset_CableSegmentOccurrence Semantic definition

Properties for the occurrence of an electrical cable, core or conductor that conforms to a type as specified by an appropriate type definition within IFC.

NOTE: Maximum allowed voltage drop should be derived from the property within Pset_ElectricalCircuit. Applicable entities Properties

Name Property Type Data Type Description
DesignAmbientTemperature IfcPropertyBoundedValue IfcThermodynamicTemperatureMeasure

The highest and lowest local ambient temperature likely to be encountered.

UserCorrectionFactor IfcPropertySingleValue IfcReal

An arbitrary correction factor that may be applied by the user.

NumberOfParallelCircuits IfcPropertySingleValue IfcCountMeasure

Number of parallel circuits.

InstallationMethod IfcPropertySingleValue IfcLabel

Method of installation of cable/conductor. Installation methods are typically defined by reference in standards such as IEC 60364-5-52, table 52A-1 or BS7671 Appendix 4 Table 4A1 etc. Selection of the value to be used should be determined from such a standard according to local usage.

InstallationMethodFlagEnum IfcPropertyEnumeratedValue PEnum_InstallationMethodFlagEnum

Special installation conditions relating to particular types of installation based on IEC60364-5-52:2001 reference installation methods C and D.

DistanceBetweenParallelCircuits IfcPropertySingleValue IfcLengthMeasure

Distance measured between parallel circuits.

SoilConductivity IfcPropertySingleValue IfcThermalConductivityMeasure

Thermal conductivity of soil. Generally, within standards such as IEC 60364-5-52, table 52A-16, the resistivity of soil is required (measured in [SI] units of degK.m /W). This is the reciprocal of the conductivity value and needs to be calculated accordingly.

CarrierStackNumber IfcPropertySingleValue IfcInteger

Number of carrier segments (tray, ladder etc.) that are vertically stacked (vertical is measured as the z-axis of the local coordinate system of the carrier segment).

MountingMethod IfcPropertyEnumeratedValue PEnum_MountingMethodEnum

The method of mounting cable segment occurrences on a cable carrier occurrence from which the method required can be selected. This is for the purpose of carrying out 'worst case' cable sizing calculations and may be a conceptual requirement rather than a statement of the physical occurrences of cable and carrier segments.

IsHorizontalCable IfcPropertySingleValue IfcBoolean

Indication of whether the cable occurrences are mounted horizontally (= TRUE) or vertically (= FALSE).

IsMountedFlatCable IfcPropertySingleValue IfcBoolean

Indication of whether the cable occurrences are mounted flat (= TRUE) or in a trefoil pattern (= FALSE).

CurrentCarryingCapacity IfcPropertySingleValue IfcElectricCurrentMeasure

Maximum value of electric current which can be carried continuously by a conductor, a device or an apparatus, under specified conditions without its steady-state temperature exceeding a specified value. Based on IEC60826-11-13. NOTE: The temperature specified value is maximum Design Ambient Temperature.

MaximumCableLength IfcPropertySingleValue IfcLengthMeasure

Maximum cable length based on voltagedrop. NOTE: This value may also be specified as a constraint within an IFC model if required but is included within the property set at this stage pending implementation of the required capabilities within software applications.

PowerLoss IfcPropertySingleValue IfcPowerMeasure

The power loss in [W].

Total loss of power across this cable.

SequentialCode IfcPropertySingleValue IfcLabel

Indicates the sequential code of the cable or wire.


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