Introduction
Electrical planning forms a central component of Building Services Engineering (TGA) and is crucial for the operational safety, energy efficiency, and future viability of a building. We plan electrical systems for multi-family homes, public buildings, and complex construction projects – in compliance with standards, economically, and with a focus on permanently safe and reliable operation.

Professional electrical planning is particularly essential for larger residential buildings, municipal projects, and demanding renovation measures to minimize technical risks and ensure smooth operation.

Classic Planning Services in the Area of Heating and Plumbing
This generally includes the following planning services in accordance with the HOAI:
– Service phases 1–9 (basic assessment to construction supervision)
– Performance and load assessment
– Network and short-circuit calculations
– Cable and line dimensioning
– Circuit and distribution diagrams
– Development of economical and effective cable routing concepts
– House connection planning
– Planning of low-voltage main distributions and sub-distributions
– Planning of self-generation systems
– Planning of medium-voltage switchgear
– Network planning / substation planning / transformer station planning
– Definition and planning supplements for interface trades
– Creation of chase and penetration plans
– Collision planning with all planning participants / trades
– Creation of final tender planning documents, circuit diagrams, and overview plans
– Creation of tenders (VOB/C)
– Participation in contract award and construction supervision
– Inventory analyses and renovation concepts
– Variant studies and cost-effectiveness comparisons

Electrical Planning – Safe and Future-Proof

Planning Focus Areas
Specialist electrical engineering planning is carried out taking into account:
– DIN VDE standards
– TAB of the respective network operator
– Energy efficiency
– Supply security
– Load management
– Electric mobility
– PV and battery storage systems
– Actual space and installation requirements
– Public law requirements and restrictions
– Cost-effectiveness over the entire life cycle

Typical Systems in Project Business
– Low-voltage systems
– Medium-voltage switchgear
– Substation construction
– Metering systems
– Sub-distributions
– Lighting systems
– Emergency lighting
– Photovoltaic systems
– Battery storage
– Large-scale battery storage facilities
– Power plant construction
– Charging infrastructure for electric vehicles
– Lightning protection and earthing systems
– Telecommunications and data networks
– Access control and video surveillance
– Fire alarm systems
– Smoke and heat extraction systems
– Voice alarm systems
– Elevator systems
– Escalators / conveyor technology in general
– Building automation

What Matters in Practice
– realistic performance and load assumptions
– economical dimensioning of cables and distributions
– sufficient power reserves for future expansions
– standard-compliant protective measures against electric shock
– selectivity and operational safety of protective devices
– economical cable routing
– coordinated cable routing planning
– consideration of electromagnetic compatibility (EMC)
– early coordination with the network operator
– consideration of building fire protection in cable routing
– sound insulation measures for cable route crossings / electrical systems
– consideration of modularity
– TAB-compliant metering concept
– IEC-compliant switchgear cabinet planning

Planning of Electrical Systems According to Current Standards

Planning According to Current Regulations
Planning is carried out in accordance with:
– DIN VDE standards
– DIN 18015
– DIN 4109
– AMEV
– DIN EN standards
– TAB of the responsible network operator
– IEC
– DIBt
– RAL RG
– Technical connection conditions
– as well as other national and European regulations

Planning Focus Areas
– demand-appropriate dimensioning of the electrical system
– economical cable and line planning
– standard-compliant protective measures
– voltage drop and short-circuit calculations
– planning of earthing and equipotential bonding systems
– surge protection
– energy efficiency
– sound and fire protection requirements
– planning in accordance with fire brigade requirements
– consideration of all interface trades
– future-proofness of the installation

Typical Systems
– low-voltage installations
– medium-voltage switchgear
– substation construction / technical centers
– general power supply
– lighting systems
– emergency lighting
– photovoltaic systems
– battery storage
– charging infrastructure
– lightning protection systems
– earthing systems
– telecommunications systems
– data networks
– fire alarm systems
– access control systems
– video surveillance
– elevator systems
– building automation

Special Features in Multi-Family Buildings (MFH)
Planning in multi-story residential construction presents special requirements:
– realistic simultaneity considerations
– dimensioning of risers and main lines
– economical metering concepts
– shaft and cable routing planning
– integration into architecture and structural engineering
– fire protection requirements for cable routing
– reserves for future expansions
– preparation for electric mobility and photovoltaics

Planning in Existing Buildings During Renovations
Renovation projects require a differentiated approach:
– integration of existing electrical systems
– adaptation to current standards
– limited space conditions
– modernization of existing distributions
– renewal of outdated wiring systems
– implementation during ongoing operations

Interfaces and Coordination
Planning is carried out in close coordination with:
– project management
– architecture
– structural engineering
– heating, ventilation, and plumbing planning
– fire protection planning
– outdoor facilities planning
– building physics
– utility network operators
– telecommunications providers
– local fire brigade
– and other project participants
Particularly in complex construction projects, early coordination is crucial to
avoid planning conflicts, construction delays, and additional costs.

Cost-Effectiveness and Life Cycle
In addition to investment costs, the focus is on:
– operating costs over the entire service life
– energy efficiency
– maintenance requirements
– expandability
– long-term operational safety
– future-proofness of the installation

Typical Risks Without Specialist Planning
Without qualified TGA planning, the following often occur:
– oversized or undersized systems
– insufficient power reserves
– overloading of cables and distributions
– voltage drop problems
– lack of selectivity of protective devices
– inadequate fire and personal protection
– inadequate galvanic isolation / safety
– conflicts with other trades
– unnecessarily high investment costs
– additional costs and planning errors during the construction phase
– up to and including significant construction delays

Why Hire an Electrical / ELT Engineering Office?
– standard-compliant and auditable planning
– secure basis for tendering and contract award
– minimization of construction and operational risks
– economically optimized systems
– future-proof and expandable electrical installation
– indispensable especially for larger residential and special-purpose buildings

Are You Planning a Project in the Area of TGA / Heating and Plumbing?
We support you in the planning and implementation of your electrical systems – from concept development through to detailed planning and successful commissioning.