Custom electrical installations for demanding buildings and sites
EOS Électricité designs and delivers custom electrical installations — power distribution, low-voltage integration, dedicated switchboards, structured cabling — engineered around your loads, operating constraints and expected level of availability.
An electrical installation engineered around your operations
A custom electrical installation is more than wiring. It is a complete technical architecture — load balance, earthing arrangement, selectivity, dedicated switchboards, cable routing, low-voltage integration — engineered from the site's real loads and operating requirements. EOS Électricité works on projects where an off-the-shelf installation is no longer enough: industrial buildings, healthcare facilities, technically dense commercial spaces, high-end residential. Every project starts with a detailed site analysis, moves through a documented engineering phase and is delivered under close construction management through to commissioning.
Challenges of a custom electrical installation
Mixed loads
Sensitive equipment coexisting with heavy loads and harmonic-rich devices in the same building.
Existing structure
Cable routes, risers and technical rooms constrained by an existing building or an occupied site.
Availability
Phased works to preserve continuity of service throughout the construction period.
Compliance
Applicable standards observed and full traceability of technical choices in a documented dossier.
Electrical engineering treated as a full discipline
Our engineers start from the loads to be supplied, not from a template. Every installation is sized from a reasoned load balance, a justified earthing arrangement and a distribution plan designed to evolve. Selectivity, personal safety, maintainability and access to isolation devices are built into the design from day one.
Technical expertise engaged
Load balance
Load analysis per area, definition of margins and growth scenarios.
Main and distribution boards
Design, selectivity, protection coordination and clear labelling.
Earthing arrangement
TT, TN or IT chosen against usage and continuity requirements, with documented reasoning.
Low-voltage / structured cabling
Network cabling, access control, security, BMS — coherent integration with power circuits.
Routing
Cable-tray drawings, segregations, reservations and coordination with other trades.
Typical applications
- Commercial buildings with high technical density
- Workshops and production sites
- Public-access buildings
- High-end private residences
- Deep renovations and extensions
Project methodology
Assessment
Site survey, audit of the existing installation and scoping with your teams.
Engineering
Load balance, earthing arrangement, distribution architecture and selectivity.
Design
Single-line diagrams, switchboard drawings, cable routing and consolidated calculation notes.
Delivery
On-site team management, quality control and cross-trade coordination.
Commissioning
Testing, measurement, protection setting and handover of the complete technical dossier.
Support
Post-commissioning follow-up, preventive maintenance and future evolutions.
Benefits of a bespoke installation
Right-sized
An installation calibrated to real loads, with neither wasteful over-spend nor risky under-sizing.
Scalability
Reserves and modularity engineered to absorb future changes of use.
Maintainability
Rigorous labelling, accessible components and up-to-date drawings simplify operations.
Safety
Selectivity, differential protection and emergency stops built into the design.
Traceability
A complete technical dossier — drawings, calculations, tests — delivered at commissioning.
Single point of contact
One engineering team owning design and delivery, from first site survey to handover.
Frequently asked questions
Scope your custom electrical installation project
Tell us about your building, its uses and its constraints. Our engineers come back with a technical read of the situation and an initial scope of work.
A project to scope or a technical constraint to validate? Our engineers are available.