Glossary
Corrugated conduit (tubo corrugado)
A flexible plastic tube with a ribbed surface that is buried in walls, floors and ceilings to carry the cables, so they can be replaced without breaking anything. Its diameter is chosen according to the number and size of the wires.
What tubo corrugado is
Tubo corrugado is the flexible conduit, usually grey (gray) or black, that runs inside walls and ceilings so the cables are not buried straight in the plaster or brick. Its ribbed shape lets it bend round corners without collapsing.
What it is for
- It protects cables from knocks, damp and the building materials themselves.
- It lets you replace or add cables later without opening the wall.
- It keeps circuits separate and makes faults easier to trace.
An installation without conduit, with the cable directly in the plaster, is typical of very old Spanish homes and means chiselling for any change.
Diameter and fill
The diameter depends on how many cables run through it and their size. ITC-BT-21 sets minimum diameters so cables go in and out without forcing. If the conduit is full, no more cables fit and a new chase is needed. In homes, 16, 20 and 25 mm are common.
Types
- Standard corrugated: the most common, inside chases or plasterboard walls.
- Reinforced corrugated: tougher, for floors and concrete.
- Halogen-free: gives off less toxic smoke in a fire; chosen for garages, shops and public buildings.
- Rigid conduit: for surface runs in garages, storage rooms and warehouses.
When you will need it
When rewiring an old flat, adding a socket or running TV and network cables. If the electrician leaves a draw wire in the conduit, new cables can go in later without building work. See rewiring old apartments in Seville, Spain.
Related services
Rewiring old apartments
Rewiring an apartment in Seville, Spain is the answer when the installation is more than 25 or 30 years old: fabric or dried-out cables, no earthing, a single RCD and a supply that cannot run the air conditioning and the induction hob at once. We renew cables, conduits, fuse board, earthing and fittings and hand you the boletín.
Renovation electrics
If you are renovating your flat, renovation electrics in Seville, Spain are the moment to bring the installation up to the way you live today: new kitchen and bathroom circuits, fuse board, chases and conduits, light points where you need them and the boletín at the end. We work in coordination with your builder or renovation company.
Cable routing and concealment
We help you with hiding TV cables in Seville, Spain so not a single one shows: inside the wall, through the false ceiling or in trunking (raceway in the US) painted the colour of the wall. We run the aerial, network, HDMI and power to the wall-mounted TV, the soundbar or the projector, with a socket behind it if needed.
Need an electrician in Seville, Spain?
Call us or send a WhatsApp message with a photo of the job. You get a fixed quote before any work starts.