Electrical installation project: contents, who prepares it and what it costs

An electrical installation project is not a mere bureaucratic formality: it is the technical plan according to which an electrical installation is executed, checked and energised. Whether we are talking about a new house, an electrical connection (bransament) to the distribution grid, or a power upgrade (spor de putere), without a properly prepared project the work cannot be approved and, above all, cannot operate safely. In this article we explain what a project contains, who has the right to prepare it, what approval stages it involves and what it costs, with indicative prices.

What an electrical installation project actually is

The electrical installation project is the technical documentation that describes how the installation is to be carried out: cable routes, conductor sizing, electrical protections, the distribution board, the earthing (priza de pamant) and the supply solution. It links the consumer’s real energy need (installed power, absorbed power) with a safe technical solution that complies with the standards in force.

In practice, you encounter the project in three typical situations:

• The interior electrical installation of a new or renovated building (home, commercial space, warehouse).
• Connection to the distribution grid (racordare) — that is, the electrical connection (bransament), managed together with the grid operator Retele Electrice Romania S.A. (formerly E-Distributie Muntenia / Enel, PPC group).
• Modification of an existing supply — for example a power upgrade (spor de putere) or switching from single-phase to three-phase.

What an electrical installation project contains

A complete project, prepared by a certified company, generally includes the following components:

The written part

• The technical report (memoriu tehnic) — description of the solution, power data, applied standards.
• The calculation summary (breviar de calcul) — sizing of cables and protections and verification of voltage drops.
• The specifications and the list of materials/equipment.

The drawn part

• The single-line electrical diagram of the distribution board.
• The layout drawings for cable routes, sockets, lighting fixtures and consumption points.
• The earthing diagram (priza de pamant) and the protection installation.

Related documents

• The data required for the connection request (cerere de racordare) and, where applicable, the grid connection project (proiectul de racordare) (the connection / bransament itself).
• Certification documents (the designer’s ANRE certificate, and where applicable project verification).

For homes, the interior installation and the supply solution are correlated with one another — which is why it is efficient for the same certified company to handle both the electrical installations and the connection to the electrical grid.

Who can prepare and execute the project

This is where the most frequent confusion arises. The project relating to grid connection and to electrical utilisation installations cannot be prepared by just anyone: an ANRE certificate (the National Energy Regulatory Authority) is required, distinct for design and for execution.

SUN WATT SRL is an ANRE-certified company for both design and execution, which means it can cover the entire flow: from documentation and dossier, through to the actual installation and preparation for energisation (punere sub tensiune). We cover Bucuresti, Ilfov and Giurgiu, and for certain works we operate with the DIU (Utilisation Installation Dossier / proof of internal installation) nationwide.

In summary:

• Design of the installations and of the connection (bransament) — ANRE design certificate.
• Execution of the work — ANRE execution certificate.
• Approval / final connection — in relation with the distribution operator Retele Electrice Romania.

The stages of a project, from idea to energisation

The process has a clear logic, and following it avoids blockages and refusals at the approval stage:

1. Establishing the power requirement — how many kW you need, single-phase or three-phase.
2. Preparing the documentation and the connection request (cerere de racordare) — the technical dossier.
3. Obtaining the ATR (Technical Connection Approval / aviz tehnic de racordare) from the operator — the document that sets the solution and the approved power. See details about the technical connection approval (ATR).
4. The project and the execution of the installation / connection (bransament) in accordance with the approved solution.
5. The final checks — PRAM measurements, verification of the earthing (priza de pamant).
6. Energisation (punere sub tensiune) and the supply contract.

One essential detail: the final price of an electrical connection (bransament) is only set through the ATR, because the technical solution (route length, overhead or underground, power) directly influences the cost. The figures below are indicative.

How much a project and an electrical installation cost — indicative prices

The prices are indicative and may vary depending on the solution set through the ATR and the complexity of the work. For a quick estimate you can use the electrical connection cost calculator or the full list of prices.

What influences the cost of the project

• The type of supply — single-phase or three-phase.
• The laying solution — overhead vs. underground (underground is, as a rule, more expensive).
• The power requested and the distance from the grid.
• The related works — earthing (priza de pamant), distribution board, PRAM measurements.

Special cases that require a project

Power upgrade or switching to three-phase

If the existing installation can no longer cope with the consumption (electric boiler, washing machine, EV charging, workshop), you need a project for increasing the power upgrade (spor de putere) or for switching from single-phase to three-phase. These too involve a connection request (cerere de racordare) and an ATR.

Connecting a photovoltaic system (prosumer)

For those who install photovoltaic panels and want to become prosumers, connecting to the grid involves a connection request (cerere de racordare), an ATR, a bidirectional meter (smart meter) fitted by the operator and a compliant dossier. SUN WATT, as an ANRE-certified company, prepares the documentation and carries out the connection on the installation and utilisation side. Details about prosumer / photovoltaic connection (racordare). For photovoltaic systems we provide a personalised quote, depending on the system configuration.

Why a properly prepared project matters

A poorly sized project means protections that trip needlessly, undersized cables that overheat, fire risks and, very often, rejection of the dossier at the approval stage. A correct project, prepared by an ANRE-certified company:

• passes the approval without repeated revisits;
• ensures a safe installation over the long term;
• avoids hidden costs from redoing the work.

Conclusion

The electrical installation project is the foundation of any sound electrical work — from a new home to a connection (bransament) or a photovoltaic system. The important thing is that it be prepared by a company certified by ANRE for both design and execution, that it follow the approval stages and that it be aligned with the solution set through the ATR.

SUN WATT SRL (bransam.ro) handles the entire flow, in Bucuresti, Ilfov and Giurgiu, with DIU nationwide. For a personalised estimate, call 0733 097 440 or write to us via the contact page.