{"id":120908,"date":"2025-12-18T08:37:29","date_gmt":"2025-12-18T06:37:29","guid":{"rendered":"https:\/\/www.michaud-export.com\/group?p=120908"},"modified":"2025-12-18T16:43:03","modified_gmt":"2025-12-18T14:43:03","slug":"underground-tap-connection","status":"publish","type":"post","link":"https:\/\/www.michaud-export.com\/group\/en\/underground-tap-connection","title":{"rendered":"How to make an underground tap connection?"},"content":{"rendered":"

Underground networks are essential for electricity distribution and for supplying end users. From a main distribution cable, underground electrical tap connections can be created to connect customers or supply a specific area, such as a street or a residential development.<\/p>\n

To achieve this, the most commonly used solution is an underground junction box, made up of three main components: the connector, the resin, and the enclosure (or shell). Before selecting these components based on their technical characteristics, it is necessary to define the type of tap to be carried out: is it a service connection (customer connections) or a network tap? The cable cross-sections involved and the electrical current transmitted directly influence the choice of the system, particularly the type and size of the connector.<\/p>\n<\/div>

Different connectors for an underground tap connection<\/span><\/h2><\/h2><\/div>

In underground environments, two main types of connectors are used: single-pole and multipole connectors.<\/p>\n<\/div>

Single-pole connectors<\/span><\/h3><\/h3><\/div>

Each conductor (phase and neutral) is tapped individually. A connector is therefore required for each conductor, meaning four connectors for a single-phase line. This solution, which is also used in overhead networks, offers a certain degree of flexibility but requires more handling during installation.<\/p>\n<\/div>

\"Connecteur<\/span><\/div>

Multipole connectors<\/span><\/h3><\/h3><\/div>

This type of connector surrounds all the conductors of the main cable in a single unit. It is generally fitted with only two screws, making installation easier. With a single tightening operation, the connector establishes the connection between the main cable and the tap cable. This system ensures balanced distribution of mechanical stress and saves space, while reducing installation time.<\/p>\n<\/div>

\"Connecteur<\/span><\/div>

The importance of resin for watertightness<\/span><\/h2><\/h2><\/div>

Underground, watertightness is a critical concern. To ensure long-lasting protection against moisture, an encapsulating resin is used, capable of filling all gaps around the connection and creating a watertight block once cured. This resin is generally supplied in a bucket, container, or dual-chamber pouch and hardens when mixed with a hardener.<\/p>\n

There are several types of resin, each with different properties:<\/p>\n