About us


Our History

Redes Trenzadas Aislantes (Retrensa) (Retrensa) is a company dedicated to the manufacture of accessories for electrical and communications installations.

Since our foundation in 1984, we have specialized in the manufacture of plastic-coated steel supports and clamps, in addition to the supply of other complementary products.

Our accessories for electrical installations are manufactured with the highest quality materials to ensure safety, durability and efficiency in each project in which they are used. Additionally, we offer a wide variety of options to adapt to the specific needs of each installation.

At our company, we are committed to customer satisfaction and strive to provide exceptional service to each of our customers. We work closely with our customers to understand their needs and help them find the products that best fit their projects.

Thanks to our commitment to quality and customer service, we have become a leading company in the manufacture of accessories for electrical installations. If you are looking for high-quality accessories for your electrical projects, please do not hesitate to contact us.

We provide our personalized products and services on demand in the following sectors:




During our more than 40 years of experience, we have worked with the main energy companies:

– Iberdrola
– Endesa
– Gas Natural Fenosa
– UFD Grupo Naturgy
– Viesgo
– Gaselec

In addition, we work with all Spanish telecommunications companies.

Retrensa, certified quality

Quality Certificates

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Our Catalogue