Metering boxes are used to measure the electricity consumption of a building site or event. They consist of a meter connected to ENEDIS and a main circuit breaker. Different types of metering boxes operate on construction sites: blue, yellow and green tariffs. These different electricity tariffs vary according to the power required on site. The use of a metering box is essential for billing the energy consumed in the work area.
Installing meter boxes may seem straightforward, but a few mistakes can quickly have serious consequences. In this case, we're talking about non-compliance with standards, and refusal of ENEDIS connection, which creates risks for the safety of both people and installations. Let's find out what mistakes to avoid when choosing your metering box.
Error 1: Incorrect selection of meter box according to use
One of the most common mistakes is choosing the wrong meter box for the job. There are three types of metering box: blue, yellow and green tariffs. These different types of metering box are defined by several powers and uses defined by ENEDIS. Here are the different tariffs:
Blue: power less than or equal to 36 kVA. This tariff is for small professionals or individual use.
Yellow: power between 37 and 250 kVA. This is a professional connection.
Green: power greater than 250 kVA. This tariff applies to large communities, industry and the service sector.
Before choosing a metering box, it's essential to check the size of your temporary installation. Do you need advice? Our experts will guide you towards the right box, compliant and ready to use.
Error 2: Non-compliance with applicable standards
For all types of equipment, numerous standards are evolving, and it is imperative to refer to them before any installation. With regard to metering boxes, the NF C 14-100 standard specifies the rules for installing, positioning and connecting metering boxes. Failure to comply with current standards can have serious consequences: refusal to connect to ENEDIS, additional costs associated with retrofitting, and endangering people.
Error 3: Incorrect positioning of meter box
The positioning of the metering box in your work area is an essential criterion for guaranteeing installation conformity and operator safety. According to standard NF C 14-100, the meter box must be installed at an accessible height of between 0.80 and 1.80 meters from the ground. The metering box should be installed in an unobstructed area easily accessible for maintenance or repair by ENEDIS or your technical teams. If you fail to follow these installation guidelines, you risk difficulties of access for maintenance or risks of premature damage.
Error 4: Incorrect connection of power cables
Even among experienced professionals, connection errors are still common when installing metering boxes. Yet proper wiring ensures the safety and performance of the installation. Insufficient cable cross-section, incorrect terminal tightening or failure to check the recommended tightening torque can lead to overheated cables and the risk of fire.
Error 5: No checks carried out before commissioning the meter box
Once your meter box has been installed, it's important to check certain parameters. Labérine advises you to check the differential circuit breakers or switches before connection. Failure to carry out a visual check of all connections can lead to overheating and other risks. Other checks are essential for the installation of a metering box, such as its protection rating and securing the box.
