The Ultimate BIM Knowledge Hub
Your one-stop resource for BIM electrical.
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Data Management
ELI5
Z1
Z1 – That part of the earth fault loop impedance which comprises the impedance under earth fault conditions of the line conductor of the circuit under consideration.
2023-02-05
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Dictionary
PUBLISHED
Information accepted by the nominated party, in which case it will be suitable for tender or construction (2D model output only). Such that the ‘Published’ area should be maintained in
2022-07-11
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How To
Life Safety Generator
Life Safety Generator selection guide Copy If the secondary power supply is provided for firefighter’s lift, it must be capable of operating the firefighter’s lift at its full rated load
2025-02-27
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Subject to Simultaneous Overload
Where circuits are grouped, there are two availablemethods of calculating the rating factor Cg to be applied: [BS7671:2018,Appendix 4,5.1.2:Equation 2] [BS7671:2018,Appendix 4,5.1.2:Equation 3,4]
2023-02-05
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BS EN ISO 21597-1:2020
Information container for linked document delivery — Exchange specification Part 1: Container
2022-07-24
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Asset Information Requirements (AIR)
Term introduced by ISO 19650 set of standards is related to information required during the operation phase of an asset AIR define managerial, commercial and technical aspects of information production,
2022-07-24
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How To
Domestic PV sizing rule-of-thumb (RoT)
Domestic PV sizing rule-of-thumb (RoT) Grid-tied, focused on self-consumption UK rule-of-thumb (RoT) Peak Sun Hours (PSH): 3.5 summer, 2.0 spring/autumn, 1.0 winter For calc use Peak Sun Hours (PSH) =
2025-09-25
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energy let-through of a device (I2t)
I2t The energy let-through of a device in A2s. The total amount of energy let through by a protective device for a given level of fault current at a stated
2023-02-05
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security
state of relative freedom from threat (3.13) or harm caused by deliberate, unwanted, hostile or malicious acts [cited from ISO 19650-5:2020(en), 3.7]
2022-07-15
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National digital twin
An ecosystem of digital twins connected via securely shared data. https://www.cdbb.cam.ac.uk/DFTG/GeminiPrinciples
2022-07-24
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delivery phase
part of the life cycle (3.2.10), during which an asset (3.2.8) is designed, constructed and commissioned [cited from ISO 19650-1:2018(en), 3.2.11] ISO 19650-2:2018 Standard dedicated to the delivery phase
2022-07-15
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attribute
Depending on the technology discussed, the term attribute can be treated as equivalent to a property or as a set of attributes, such as the number of elements in a
2022-07-24
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Current carrying capacity of a cable (Iz)
Iz The current carrying capacity of a cable under the defined installation conditions. This is the effective rating of the cable after the relevant rating factors have been applied, i.e.,Ca,
2023-02-05
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Internet of Things (IoT)
This phrase refers to networked infrastructures that interconnect physical objects and allow for the management of the data they generate. A typical example of IoT is a home energy monitor
2022-07-11
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Construction Operation Building information exchange (COBie)
COBie is a non-proprietary data format for the publication of a subset of building information models (BIM) that focuses on delivering asset data rather than geometric information. It is formally
2022-07-24
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BIM Strategic Lead
Responsible for project strategic direction from the tender stage, guides project set up and advises on the project when needed. Typical Lead Appointed Party BIM staff duties include: Development of
2022-07-11
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Project setup
During project setup phase It is essential to establish and analyse a timeline that guides the entire team in delivering the project on time. Thus the prospective Lead Appointed Party
2022-07-04
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Blog
Terminology and UK Contract Law
The use of terms such as Lead Appointed Party, Appointed Party and Task Team in lieu of terms: employer, supplier, contractor and subcontractor, require clarification to become legally binding. The
2021-02-21
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Intermediate Event (Link/Catching)
Paired link events can also be used as “off-page connectors” in order to print a process across multiple pages. Within the process level, they can also be used as generic
2022-07-04
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risk appetite
amount and type of risk that an organization is willing to pursue or retain [cited from ISO 19650-5:2020(en), 3.5]
2022-07-15
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Subcommittee (SC)
a Subcommittee (SC), which addresses a specialized area within a TC; https://www.iso.org/glossary.html
2022-07-24
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Management of duplicates
The procedure to remove duplicate properties shall be carried out on the relevant attributes. The management of duplicates cannot be fully automated. BS EN ISO 23386:2020
2022-07-24
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Scope
Bid response should include a scope management plan containing all the tasks necessary for successful project delivery. The plan shall define the implementation and verification of workflows. A project should
2022-07-04
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Instructions
LTF_Lighting-Fixture Ring
Create unlimited lighting variations with parametric control.
The PD_LTF_Lighting-Fixture_Luminaire-Ring Family is a powerful, fully parametric Revit family that allows users to create limitless lighting fixture configurations.
2025-02-09
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BS 9999:2017
Fire safety in the design, management and use of buildings – Code of practice
2022-07-15
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Blog
The importance of Information Requirements to a successful Asset Information Management (AIM) System
Introduction One of the challenges is the Appointing Party’s difficulties with the development of successful Operational Information Requirements in relation to asset management. Understanding the business challenges that define the
2020-12-21
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Model View Definition (MVD)
One or more specific information exchange requirements may necessitate the need for a model view definition (MVD). A machine-readable representation of MVDs is required when using them in software development.
2022-07-24
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Instructions
Document Naming Strategy
DOCUMENT NAMING STRATEGY All information in the PD Revit Template follows PROJECT DESIGN (IO) standards. the For one-page drawing naming strategy, please refer to free download E-5161 OnePage Naming Strategy
2025-07-11
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Dictionary
Task Information Delivery Plan (TIDP)
schedule of information containers and delivery dates, for a specific task team [cited from ISO 19650-2:2018(en), 3.1.3.4] The Task Information Delivery Plan (TIDP) is defined by the ISO 19650 framework
2022-07-15
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tension between hope and ambiguity
term coined by Deloitte[1], it is a current situation where whilst businesses conceptually understand the significant changes that information Management (IM) and technology may bring, they have divergent agendas and
2022-07-04
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Dictionary
BIM
Building Information Modelling (BIM)[1] broadly describes the processes employed during digital information management related to a built asset such as a building, bridge, highway or tunnel. ISO 19650 outlines a
2022-07-24
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Golden thread
The (digital by default) record of predefined documents and building information required to ensure that the original design intent and any subsequent building changes are captured, preserved, and used to
2022-07-04
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Asset Information Model (AIM)
The Asset Information Model or AIM is a term used to define the set of information gathered from all sources that support the continuing management of an asset
2022-07-24
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Co-Location
Assembling the entire BIM design and construction team in a single location (“Co-location”) enables almost instant and direct communication and coordination among team members. This Co-location of all team members
2022-07-11
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Nominal line voltage to earth (Uo)
Uo Nominal line voltage to earth. Assumed to be 230 V for grid connected systems.
2023-02-05
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Global Trade Item Number (GTIN)
Global Trade Item Number (GTIN) identifier for trade items used to look up product information in a database GS1 [1] 1 Online Browsing Platform (OBP) [WWW Document], n.d. URL https://www.iso.org/obp/ui#search
2022-07-11
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BS 8536-1:2015
Briefing for design and construction Part 1: Code of practice for facilities management (Buildings infrastructure)
2022-07-15
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Work stages
A division of standardised process and activities into named stages during the life of a system or facility. The process and activities extending from the definition of its requirements to
2022-07-11
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Dictionary
VEAM connector
VEAM connectors refer to a specific type of electrical bayonet type connectors known for their robustness and reliability in harsh environmental conditions. These connectors are commonly used in various industries,
2024-01-11
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Geographic Information System (GIS)
A geographic information system (GIS) is a framework for gathering, managing, and analyzing data. Rooted in the science of geography, GIS integrates many types of data. It analyzes spatial location
2022-07-24
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suitability
degree to which a product, system or information provides functions that meet stated and implied needs when used under specified conditions [cited from: ISO/IEC 25010:2011(en), 4.2.1, added word ‘information’] appropriateness
2022-07-27
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identification
The “identification” is ISO 19650 term equivalent to PAS 1192 term ‘naming’
2022-07-27
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Intermediate Event
An intermediate event is something that occurs between the beginning and end of a process. Triggers can be “caught” or “thrown” by intermediate events. [1] Symbol 1] Silver, B. (2009).
2022-07-04
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framework
structure of processes and specifications designed to support the accomplishment of a specific task[ISO/IEEE 11073-10201:2004, definition 3.22] PD ISO/TS 12911:2012
2022-07-24
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Intermediate Event (Message/Catching)
A message intermediate event can be used to both send and receive messages. When used to “catch” the message, the event marker must be left empty. If the process was
2022-07-04
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BS EN ISO 21597-2:2020
Information container for linked document delivery. Exchange specification. Link types
2022-07-15
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Semi-enclosed fuse rating factor (Cf)
The rating factor Cf = 0.725 is applied to cable sizing calculations for any circuit protected by a semi-enclosed fuse to BS3036.
2023-02-05
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Globally Unique Identifier (GUID)
globally unique identifier (GUID) its a unique object identifier that guarantees its uniqueness throughout its entire life unique, the identifier is usually generated using an algorithm a unique identifier generated
2022-07-24
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Clash Detection
Clash detection, coordination analysis and data checks shall be carried out by the BIM Coordinators against the latest shared models. The workflows involve a combination of visual and automated checks
2022-07-04
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How To
Electrical & Mechanical Equipment Access and Maintenance
Electrical & Mechanical Equipment: Access & Maintenance (UK) “All controlgear shall be mounted so as to facilitate its operation and maintenance. Where a special tool is necessary to adjust, maintain,
2025-08-21
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