Electrical Risers - Design and Replacement for Apartment Blocks and Stairwells

Electrical risers are the main "arteries" of a block's installation: the cables that carry power from the main distribution board (the connection cabinet) up to the boards and meters on each floor. Over the years, old aluminium risers that are undersized or have degraded insulation become a real hazard - overheating conductors, voltage drops, repeated tripping of fuses and, in serious cases, a fire risk. As residents increase their consumption (electric boilers, air-conditioning units, induction hobs, EV charging), a riser designed several decades ago can no longer cope.

When you need it

You need your electrical risers refurbished when: the fuses on the riser or in the apartments trip frequently for no apparent reason; you notice the smell of burnt insulation, soot marks or overheating at the connection cabinet or the landing boards; the voltage "drops" noticeably when large appliances switch on; or the riser is old, made of aluminium, or was installed in a makeshift way with non-compliant joints and extensions. Refurbishing the riser is also necessary when modernising the block, when increasing the approved power for the stairwell or for individual apartments, and when the owners' association wants to bring the communal installation up to current standards. In new builds (apartment blocks and multi-dwelling buildings), risers are designed and installed from scratch together with the rest of the electrical installation.

How it works — step by step

1. On-site assessment and measurements. We come to your location, inspect the connection cabinet, the rising riser route, the landing boards and the condition of the conductors. We determine the power required for the stairwell and per apartment, the correct cable cross-section and what needs to be resized. The assessment is the basis for a clear quote, with no surprises.
2. Technical design and custom quote. We prepare the electrical riser design (single-line diagram, conductor sizing, protections) in accordance with the regulations in force. You receive a transparent quote based on the number of apartments, the length of the riser, the type of routing and the materials chosen. For risers, the quote is always custom - there is no fixed price.
3. Approvals and dealing with the operator, where applicable. If the works involve increasing the power for the stairwell or alterations to the connection, we prepare and submit the file to Retele Electrice Romania (Distributie Energie Electrica Romania), the former E-Distributie/Enel, and handle obtaining the ATR (Technical Connection Approval). You do not have to chase the paperwork - we take care of it for you.
4. Installing the riser. We replace the rising riser and/or the landing risers with new, correctly sized cable, installed in protective conduits or along organised routes. We remake the connections in the cabinet and the landing boards, fit new protections and provide proper earthing. We work in coordination with residents so that power outages are kept as short as possible.
5. Testing, commissioning and documentation. After installation we carry out the electrical tests (continuity, insulation, earthing) and hand over a fully functional riser. The owners' association receives the documentation for the works, carried out by an ANRE-certified company - useful at handover, for the warranty and in dealings with the operator.

Required documents

• The owners' association agreement/resolution (for works on the communal parts of the block)
• The representative's identity document (administrator/association president)
• Details of the existing connection: the approved power for the stairwell and per apartment
• The survey or diagram of the existing installation, if available (not mandatory - we can survey it ourselves during the assessment)
• For a power increase or connection alterations: the title deed/land registry extract and, where applicable, an urban planning certificate
• For new builds: the architectural design and the building permit

Why bransam.ro

• A company certified by ANRE for both execution AND design - the design and the works are handled by the same team, with no intermediaries and no passing the job between firms.
• A turnkey service: assessment, design, approvals, execution and final documentation - we handle all the paperwork and the relationship with the operator.
• Correct sizing of the riser for the stairwell's real and future consumption, so you do not have to redo the work in a few years.
• Work organised around the residents, for the shortest possible power outages and a clean site in the communal areas.
• Compliant materials and electrical tests on completion (insulation, continuity, earthing), with documentation that stays with the association.
• A local team in Bucharest, Ilfov and Giurgiu, with a short response time and a free quote.

How long it takes

As a guide: the on-site assessment and the quote are usually completed within a few days. The technical design typically takes a few days to 1-2 weeks, depending on complexity. The actual installation of a block stairwell riser usually takes place over a few days, with planned, short-duration power outages. If the works involve a power increase and approval from the operator, the overall timeframe increases - obtaining the ATR (Technical Connection Approval) takes roughly a few weeks.

Indicative price