IHE ServicesElectrical Engineering – 16 Specializations
From high-voltage systems to photovoltaics – we design all electrical engineering disciplines according to current DIN and VDE standards.
High-Voltage Systems
Design of low-voltage systems per DIN 18015 and VDE. Transformers, switchgear, distribution boards and cable routing for buildings of all sizes.
Low-Voltage Systems
Communication networks, data connections, telephone systems and structured cabling per DIN EN 50173. Cat.6a/Cat.7 and fiber optics.
Medium-Voltage Systems
Design and dimensioning of medium-voltage switchgear (10/20 kV), transformer stations and earthing concepts for industrial facilities.
Lighting Design
Standard-compliant indoor and outdoor lighting per DIN EN 12464. Energy-efficient LED concepts, lighting control and emergency lighting.
Fire Detection Systems (FAS)
Certified specialist planning per DIN 14675. Automatic fire detectors, manual call points, alerting concepts and fire brigade connection.
Voice Alarm Systems (VAS)
Design of voice alarm systems for evacuation and announcements. Compliant with DIN VDE 0828 and VDE 0833.
Nurse Call Systems
Personal call systems for hospitals and nursing homes per DIN VDE 0834. Nurse call, patient terminals and communication systems.
Security Technology
Access control, video surveillance (CCTV), intrusion detection and emergency exit systems. Integration into holistic security concepts.
Network Technology / IT
Structured cabling, fiber backbone, server room design, UPS concepts and active network components.
Photovoltaics
Design of PV systems for self-consumption and grid feed-in. Profitability calculations, storage concepts and EV charging integration.
E-Mobility / Charging Infrastructure
Comprehensive charging infrastructure for cars and trucks. Load management, backend connection and billing systems per GEIG.
Lightning / Surge Protection
External and internal lightning protection per DIN EN 62305. Earthing systems, equipotential bonding and surge arresters.
Electrical Installation
Installation planning for switches, sockets, distributions. Main distribution boards, emergency supply and room specifications.
Energy Consulting
Energy-efficient building technology, EnEV/GEG certifications, KfW funding advice and cost-benefit analyses for investment decisions.
Tendering & Contracting
Preparation of bills of quantities, mass calculations, price comparisons and contracting recommendations per VOB/A.
Construction Supervision
On-site construction supervision (phase 8), acceptance, measurement control, defect management and documentation through final invoicing.
HOAI-Compliant Planning
All services are delivered according to HOAI (service phases 1–9). Cost groups 440–480 per DIN 276.
Frequently asked questions — Electrical planning
Answers to the most common questions about electrical planning per HOAI, DIN 18015 and VDE.
What does electrical planning cost per m² gross floor area?
For electrical planning under HOAI Group 4 (low/medium voltage), the typical fee floor is 4–7 % of eligible construction cost for that group, depending on fee zone (II–IV) and contract value. For an office of 5,000 m² with a KG 440 of €800/m², phases 1–9 typically come to €18,000–28,000 (HOAI 2021).
Which HOAI phases are typically commissioned for electrical planning?
The 9 phases per HOAI § 55: 1 Basic evaluation, 2 Preliminary design, 3 Design development, 4 Permit submission, 5 Construction documents, 6 Bid preparation, 7 Bid evaluation, 8 Construction supervision, 9 Project documentation. Typical focus: phases 3, 5 and 8.
When is a fire alarm system per DIN 14675 mandatory?
An FAS per DIN 14675 is mandatory in special-use buildings: high-rises (>22 m), assembly halls (>200 seats), hospitals, care homes, larger schools, and any building whose fire-safety concept requires automatic detection. The exact requirement follows the state building code and the project's fire-safety concept.
What is the difference between bill-of-quantities and VOB tendering?
A bill of quantities (LV) is the structured list of services with quantities and unit prices. The VOB (German Construction Contract Procedures) is the regulatory framework public buyers must follow. Private clients are not bound by VOB but often adopt it contractually.
How long does permit planning (phase 4) for a school take?
For a school of 1,000–3,000 m² gross floor area, permit planning typically takes 3–6 months from commission to submission. Add 3–6 months of authority review. Special-use buildings with fire-safety experts extend the lead time accordingly.
Which roles work in electrical planning?
Typically: electrical engineer (Dipl.-Ing. / B.Eng. / M.Eng. EE), state-certified electrical technician, CAD design specialist (EPLAN), site supervisor for phase 8, and certified fire-alarm planner with DIN 14675 qualification.