The issue of ownership of the cable connection often raises doubts among both investors and professional installers. At Onninen, thanks to our many years of experience in the installation industry, we regularly advise clients on matters related to energy connections. Understanding the division of responsibilities between the investor and the energy company is crucial for the proper implementation of electrical installations.
The topic of ownership of the cable connection is regulated by energy law and connection agreements, which precisely define the boundaries of responsibility of the respective parties. Knowledge of these principles helps avoid costly mistakes and disputes during the implementation of installation projects.

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Owner of the cable connection – who is responsible?
According to the applicable regulations, the owner of the cable connection is the energy company. This is a key piece of information that directly affects the division of responsibilities and costs associated with the operation of the installation. The energy company takes ownership of the connection at the moment it is constructed and connected to the distribution network.
Boundary of ownership between the energy company and the investor
The boundary of ownership is precisely defined in the technical conditions of connection and the connection agreement. In the case of cable connections, this boundary most often runs:
- At the terminals of the cable connection from the recipient's side
- Behind the metering and settlement system (the meter)
- In the metering box at the property boundary
From this point, the investor's responsibility for the internal power supply line (WLZ), which brings energy from the connection to the installation in the building, begins.
Responsibilities of the energy company as the owner of the connection
As the owner of the cable connection, the energy company bears full responsibility for:
- Maintenance and ongoing upkeep of the connection
- Repairs and troubleshooting within its ownership
- Replacement of damaged components of the connection
- Modernization of metering and settlement devices
- Ensuring uninterrupted energy supply to the boundary point
Responsibilities of the investor regarding the cable connection
Although the owner of the connection is the energy company, the investor has a number of important responsibilities. At Onninen, we often encounter situations where clients are unaware of the full scope of their obligations.
Execution of the internal power supply line
The most important obligation of the investor is to execute the internal power supply line (WLZ) at their own expense. The WLZ is the section of the installation connecting the cable connection to the electrical installation in the building. The internal power supply line must meet rigorous technical requirements:
| Parameter | Requirements |
|---|---|
| Current carrying capacity | Not less than the peak load |
| Cross-section of wires | In accordance with SEP-E-002 standards |
| Protection | Effective overload protection |
| Quality of supply | Ensuring stable parameters |
Maintaining the connection in good technical condition
Although the investor is not the owner of the connection, they are obliged to maintain it in good condition. This means, among other things:
- Protection against mechanical damage
- Ensuring free access for energy services
- Reporting any observed irregularities
- Not making unauthorized modifications
Ensuring access to the connection
The investor must guarantee unrestricted access to the cable connection for energy services. This applies to both routine meter readings and modernization or repair work. When
designing fences or other elements of small architecture, this necessity must be taken into account.
Practical aspects of managing the cable connection
In practical installation, we often encounter situations requiring precise definition of the parties' responsibilities. Our team of experts at Onninen regularly advises in such cases.
Compensation for the connection executed by the investor
In some cases, the investor may execute the cable connection at their own expense, especially for long connections. According to Article 49 §2 of the Civil Code, the investor may demand appropriate compensation from the energy company for the takeover of ownership of the devices constructed.
Costs associated with the cable connection
The division of costs associated with the cable connection is as follows:
- Energy company: construction of the connection, installation of the connection, geodetic documentation
- Investor: execution of the WLZ, preparation of the installation site, protections
Onninen products for the implementation of cable connections
In Onninen's assortment, we offer a complete range of products necessary for the execution of professional electrical installations. Our ready connectors are characterized by high quality and reliability, meeting the highest safety standards.
For professional installers, we have also prepared a wide selection of solutions in the field of energy and lightning protection systems. The products available in our offer come from renowned manufacturers and are available immediately in Onninen warehouses throughout Poland.
Technical support and consulting
Our specialists provide professional technical advice on selecting appropriate solutions for specific projects. We also offer support in interpreting technical requirements and regulations regarding electrical installations.
Frequently asked questions
1. Who is the owner of the cable connection?
The owner of the cable connection is the energy company that constructs and installs it. The company is also responsible for maintenance, repairs, and modernization of the devices in the connection.
2. What is the internal power supply line (WLZ)?
The internal power supply line is the section of the installation connecting the cable connection to the electrical installation in the building. The WLZ is executed and financed by the investor at their own expense, in accordance with the technical requirements specified in industry standards.
3. Where is the boundary of ownership between the energy company and the investor?
The boundary of ownership most often runs at the terminals of the cable connection from the recipient's side, behind the metering and settlement system. The exact location is defined by the connection agreement and the technical conditions of connection.
4. Can the investor demand compensation for the executed cable connection?
Yes, according to Article 49 §2 of the Civil Code, the investor can demand appropriate compensation from the energy company for the takeover of ownership of the devices they constructed at their own expense. However, this requires an appropriate agreement between the parties.
5. What obligations does the investor have regarding the cable connection?
The investor must maintain the connection in good condition, ensure access for energy services, and execute the WLZ. Additionally, they cannot make unauthorized modifications to the connection or restrict access to it.
6. Who bears the costs of repairing the cable connection?
The costs of repairing and maintaining the cable connection are borne by the energy company as its owner. Exceptions are damages caused by the investor's actions - in such cases, the repair costs may be charged to them.
7. Can access to the cable connection on one's property be restricted?
No, the investor must ensure unrestricted access to the cable connection for energy services. A fence with a gate can be used, but access must be possible at all times for modernization and repair work.
Professional implementation of connections – the key to success
Correct understanding of the division of responsibilities related to the ownership of the cable connection is the foundation of professional implementation of electrical installations. At Onninen, we support installers with a comprehensive product offering and substantive technical advice.
Our network of branches throughout Poland guarantees quick availability of products and local technical support. We offer solutions from basic installation elements to specialized energy systems, always at the highest quality.
We invite you to cooperate and take advantage of our experience in the implementation of installation projects. Our team of experts is at your disposal for technical matters and the selection of optimal solutions for specific applications.