#### 7.2.3.11 IfcElectricDistributionBoard

| Tableau de distribution électrique
| Elektrischer Verteilungsregler

A distribution board is a flow controller in which instances of electrical devices are brought together at a single place for a particular purpose.

A distribution provides a housing for connected electrical distribution elements so that they can be viewed, operated or acted upon from a single place. Each connected item may have its own geometric representation and location.

> HISTORY New entity in IFC4

## Electrical System Design

As circuits on a distribution board are commonly numbered left-to-right then top-to-bottom, port ordering follows suit. A distribution board has a port corresponding to each slot that may be used by one or more breakers. For example, in a distribution board for a split-phase system having two columns, ports 1 and 2 are on the first phase, ports 3 and 4 are on the second phase, 5 and 6 on the first, and so on.

Single phase breakers (e.g. 120V) have one port connected to the slot of the distribution board, and one port optionally connected to a load. Double phase breakers (e.g. 240V) have two ports connected to slots within the distribution board, and one port optionally connected to a load, where such port encapsulates wires for both phases along with neutral and ground. Twin breakers have one port connected to the slot of the distribution board, and two ports optionally connected to separate loads.

Figure 109 illustrates multiple configurations of breakers within a distribution board.

Figure 109 — Electric distribution board layout

The following concepts are inherited at supertypes:

- IfcDistributionElement: Footprint Geometry

Instance diagram

Identity

The Identity concept applies to this entity.

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  | R | R | R | R |  |  | R | R | R
Export |  |  |  |  | R | R | R | R |  |  | R | R | R

Object Typing

The Object Typing concept applies to this entity as shown in Table 89.

Type
IfcElectricDistributionBoardType
IfcDistributionElementType
Table 89 — IfcElectricDistributionBoard Object Typing

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  |  |  |  |  |  |
Export |  |  |  |  |  |  |  |  |  |  | R |  | R

Properties for Occurrences

The Properties for Occurrences concept applies to this entity as shown in Table 90.

PredefinedType | Name
--- | ---
| Pset_ElectricDistributionBoardTypeCommon
| Pset_ElectricDistributionBoardOccurrence
| Pset_ElectricalDeviceCommon
Table 90 — IfcElectricDistributionBoard Properties for Occurrences

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  | R |  | R | R |  |  |  |  |
Export |  |  |  |  | R |  | R | R |  |  | R |  | R

Body Geometry

The Body Geometry concept applies to this entity as shown in Table 91.

RepresentationType | Geometry | Description
--- | --- | ---
Brep | IfcFacetedBrep | All fixtures (all non distribution flow elements, i.e. everything which is not a duct, a pipe, a cable, or a cable carrier) should be defined by an b-rep geometry. This includes also the complex flow fitting elements (e.g. Y branch or T branch) or distribution flow elements with size changes (e.g. reducer).
SurfaceModel | IfcFaceBasedSurfaceModel | If the geometric model consistency of a b-rep shape representation can not be guaranteed (arcwise connected volume bounded by faces, each being connected, oriented, finite, closed 2-manifold), a surface representation based on open shells should be used.
SweptSolid | IfcExtrudedAreaSolid | All "simple" distribution flow elements (general ducts and pipes) are defined by sweep geometry.
SectionedSpine | IfcSectionedSpine | If only the analytical shape is required for which the exact interpolation between the cross sections is not required, a sectioned spine can be used.
CSG | IfcCsgSolid |
Tessellation | IfcTriangulatedFaceSet |
MappedRepresentation | IfcMappedItem | All occurrences of IfcDistributionElement (and its subtypes) should (whenever possible) share a representation map established by the assigned type. The geometric representation of the occurrence is then an IfcMappedItem.
Table 91 — IfcElectricDistributionBoard Body Geometry

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  | - |  |  |  |  |  |  | R | R | R
Export |  |  |  | - |  |  |  |  |  |  | R | R | R

Clearance Geometry

The Clearance Geometry concept applies to this entity.

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  | - |  |  |  |  |  |  |  |  |
Export |  |  |  | - |  |  |  |  |  |  |  |  |

Element Decomposition

The Element Decomposition concept applies to this entity as shown in Table 92.

RelatedObjects
IfcProtectiveDevice
Table 92 — IfcElectricDistributionBoard Element Decomposition

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  |  |  |  |  |  |
Export |  |  |  |  |  |  |  |  |  |  |  |  |

Ports

The Ports concept applies to this entity as shown in Table 93.

PredefinedType | Name | Flow | Type | Description
--- | --- | --- | --- | ---
CONSUMERUNIT | Line | SINK | ELECTRICAL | Incoming power, such as a cable connecting from the electrical utility or another distribution board.
CONSUMERUNIT | Ground | SINK | EARTHING | Grounding connection, such as a cable connecting to a cable fitting connected to a cold water pipe segment coming from the ground.
CONSUMERUNIT | Circuit#1 | SOURCE | ELECTRICAL | A downstream circuit, typically connected to a circuit breaker protective device.
CONSUMERUNIT | Circuit#2 | SOURCE | ELECTRICAL | A downstream circuit, typically connected to a circuit breaker protective device.
CONSUMERUNIT | Circuit#3 | SOURCE | ELECTRICAL | A downstream circuit, typically connected to a circuit breaker protective device.
CONSUMERUNIT | Circuit#4 | SOURCE | ELECTRICAL | A downstream circuit, typically connected to a circuit breaker protective device.
CONSUMERUNIT | Circuit#5 | SOURCE | ELECTRICAL | A downstream circuit, typically connected to a circuit breaker protective device.
CONSUMERUNIT | Circuit#6 | SOURCE | ELECTRICAL | A downstream circuit, typically connected to a circuit breaker protective device.
CONSUMERUNIT | Circuit#7 | SOURCE | ELECTRICAL | A downstream circuit, typically connected to a circuit breaker protective device.
CONSUMERUNIT | Circuit#8 | SOURCE | ELECTRICAL | A downstream circuit, typically connected to a circuit breaker protective device.
Table 93 — IfcElectricDistributionBoard Ports

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  | R |  | R | R |  |  |  |  | R
Export |  |  |  |  | R |  | R | R |  |  |  |  | R

Spatial Containment

The Spatial Containment concept applies to this entity as shown in Table 94.

Structure
IfcSpace
Table 94 — IfcElectricDistributionBoard Spatial Containment

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  | O |  | R | R |  |  |  |  | R
Export |  |  |  |  | O |  | R | R |  |  |  |  | R

Placement

The Placement concept applies to this entity.

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  | O |  |  | R |  |  | R |  | R
Export |  |  |  |  | O |  |  | R |  |  | R |  | R

Classification

The Classification concept applies to this entity.

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  |  |  |  |  |  | R
Export |  |  |  |  |  |  |  |  |  |  |  |  | R

XSD Specification:

<xs:element name="IfcElectricDistributionBoard" type="ifc:IfcElectricDistributionBoard" substitutionGroup="ifc:IfcFlowController" nillable="true"/>
<xs:complexType name="IfcElectricDistributionBoard">
<xs:complexContent>
<xs:extension base="ifc:IfcFlowController"/>
</xs:complexContent>
</xs:complexType>

EXPRESS Specification:

ENTITY IfcElectricDistributionBoard

| SUBTYPE OF (IfcFlowController);

PredefinedType | : | OPTIONAL IfcStrippedOptional;

| WHERE

CorrectPredefinedType | : | NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcElectricDistributionBoardTypeEnum.USERDEFINED) OR ((PredefinedType = IfcElectricDistributionBoardTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
CorrectTypeAssigned | : | (SIZEOF(IsTypedBy) = 0) OR ('IFCELECTRICALDOMAIN.IFCELECTRICDISTRIBUTIONBOARDTYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));

END_ENTITY;

Formal Propositions:

CorrectPredefinedType | : | Either the PredefinedType attribute is unset (e.g. because an IfcElectricDistributionBoardType is associated), or the inherited attribute ObjectType shall be provided, if the PredefinedType is set to USERDEFINED.
CorrectTypeAssigned | : | Either there is no electric distribution board type object associated, i.e. the IsTypedBy inverse relationship is not provided, or the associated type object has to be of type IfcElectricDistributionBoardType.

Inheritance Graph:

ENTITY IfcElectricDistributionBoard

| ENTITY IfcRoot

GlobalId | : | IfcGloballyUniqueId;
OwnerHistory | : | OPTIONAL IfcOwnerHistory;
Name | : | OPTIONAL IfcLabel;
Description | : | OPTIONAL IfcText;

| ENTITY IfcObjectDefinition

| INVERSE

HasAssignments | : | SET OF IfcRelAssigns FOR RelatedObjects;
Nests | : | SET [0:1] OF IfcRelNests FOR RelatedObjects;
IsNestedBy | : | SET OF IfcRelNests FOR RelatingObject;
HasContext | : | SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions;
IsDecomposedBy | : | SET OF IfcRelAggregates FOR RelatingObject;
Decomposes | : | SET [0:1] OF IfcRelAggregates FOR RelatedObjects;
HasAssociations | : | SET OF IfcRelAssociates FOR RelatedObjects;

| ENTITY IfcObject

ObjectType | : | OPTIONAL IfcStrippedOptional;

| INVERSE

IsDeclaredBy | : | SET [0:1] OF IfcRelDefinesByObject FOR RelatedObjects;
Declares | : | SET OF IfcRelDefinesByObject FOR RelatingObject;
IsTypedBy | : | SET [0:1] OF IfcRelDefinesByType FOR RelatedObjects;
IsDefinedBy | : | SET OF IfcRelDefinesByProperties FOR RelatedObjects;

| ENTITY IfcProduct

ObjectPlacement | : | OPTIONAL IfcObjectPlacement;
Representation | : | OPTIONAL IfcProductRepresentation;

| INVERSE

ReferencedBy | : | SET OF IfcRelAssignsToProduct FOR RelatingProduct;

| ENTITY IfcElement

Tag | : | OPTIONAL IfcStrippedOptional;

| INVERSE

IsInterferedByElements | : | SET OF IfcRelInterferesElements FOR RelatedElement;
InterferesElements | : | SET OF IfcRelInterferesElements FOR RelatingElement;
ContainedInStructure | : | SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;

| ENTITY IfcDistributionElement

| INVERSE

| ENTITY IfcDistributionFlowElement

| INVERSE

| ENTITY IfcFlowController

| ENTITY IfcElectricDistributionBoard

PredefinedType | : | OPTIONAL IfcStrippedOptional;

END_ENTITY;

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