Underground Electrical Connection

An underground electrical connection is the solution in which the electricity supply is delivered through a cable buried in the ground, running between the grid's connection point and the property's connection cabinet. Unlike the overhead option, the underground route uses no intermediate poles or suspended cables, making it the preferred choice where a clean-looking yard is desired, where the distance to the grid allows it, or where local planning rules require lines to be buried.

SUN WATT SRL is a company certified by ANRE (the Romanian Energy Regulatory Authority) for the execution and design of electrical installations and connections. For clients in Bucharest, Ilfov and Giurgiu we handle the entire process, from submitting the connection request to the operator Retele Electrice Romania (Distributie Energie Electrica Romania), formerly E-Distributie Muntenia / Enel, through to fitting the meter and energising the supply. We work on a turnkey basis: we prepare the file, design and execute the connection, draw up the Utilisation Installation Dossier (DIU, the document confirming that the indoor installation has been built correctly and safely), and handle the paperwork with the distribution operator.

When you need it

You need an underground electrical connection when you are building a new house and want the supply to avoid running through overhead cables across the yard, when the plot is positioned so that the underground route is shorter or more practical than the overhead one, or when the local planning regulations or the planning certificate require a buried connection. An underground connection is also recommended when modernising an existing home where the overhead network is being phased out, for buildings with facades or landscaping that do not allow a pole-mounted route, as well as for commercial premises, warehouses or workshops that require a three-phase connection (400V) with a protected and tidy route.

How it works — step by step

1. Connection request and file preparation. We submit the connection request together with the required documents to the operator Retele Electrice Romania (Distributie Energie Electrica Romania). At this stage we determine the requested power and the type of connection (single-phase 230V or three-phase 400V), based on your estimated consumption.
2. Obtaining the ATR and the connection contract. The operator issues the Technical Connection Approval (ATR), which sets out the technical conditions and the connection tariff. Once the connection contract has been signed and the tariff paid, the works can move into the execution phase.
3. Design and execution of the underground connection. We prepare the connection design and carry out the underground route: digging the trench to the regulated depth, laying the cable in a protective conduit, on a sand bed and with warning tape, installing the connection cabinet and the protection equipment, and then restoring the ground to its original condition.
4. Utilisation Installation Dossier (DIU). The ANRE-certified electrician draws up the Utilisation Installation Dossier (DIU), a mandatory document confirming that the indoor installation has been carried out correctly and safely, preparing the property for metering.
5. Meter fitting and energisation. The operator fits the meter and energises the connection. Once the supply contract has been concluded, the property is supplied with electricity.

Required documents

• Identity document of the holder (identity card)
• Proof of ownership of the property (up-to-date Land Registry extract)
• Planning certificate (for new builds)
• Site plan and location plan
• Completed connection request
• Building permit, where applicable

Why bransam.ro

• Company certified by ANRE for both the execution and the design of connections and electrical installations
• Turnkey service: we handle all the paperwork, from the connection request through to energisation
• The file and the DIU are completed in full by an ANRE-certified electrician, with no unnecessary trips for you
• Correct execution of the underground route, with the cable in a protective conduit, on a sand bed and with warning tape, in line with regulations
• We know the procedures of the operator Retele Electrice Romania (Distributie Energie Electrica Romania) in the Bucharest, Ilfov and Giurgiu area
• Direct communication and advice on the power and type of connection best suited to your consumption

How long it takes

As a guide, the ATR is issued within a few weeks of the file being submitted, and the entire process, from file to energisation, usually takes between 4 and 12 weeks. Timeframes depend on the distribution operator, the complexity of the underground route and any additional approvals that may be needed.

Indicative price