Summary of Clase bt 2

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In the "Clase bt 2" YouTube video, the speaker discusses the importance of using appropriate electrical cables for various installations, with a focus on low-tension electricity installations for residential, commercial, and photovoltaic applications. The choice of cables depends on factors such as installation type and relevant electrotechnical regulations. For instance, blue cables are suitable for zones átex and provide mechanical protection against rodent or mechanical aggression. The speaker also mentions cables with fire-resistant properties, such as Afumex , for buildings. Industrial installations may require cables like wirepoint ce pro or H07RNF flextreme for electromagnetic interference protection. Photovoltaic installations require specific cables, such as PVcu 2.0 c Pro and those with copper-tinned coated cables, to ensure the functionality and longevity of the system by preventing impedance mismatches and unwanted harmonic currents. The speaker emphasizes the importance of considering fire safety and the role of building codes in mandating the use of fire-resistant cables.

  • 00:00:00 In this section of the "Clase bt 2" YouTube video, the focus shifts to the applications of cables for low-tension electricity installations and the relevant electrotechnical regulations. The choice of cables depends on various factors, including the installation type, such as a residential building versus a commercial center or a photovoltaic installation. The regulations classify different installations, and specific systems and cable types are allowed for each. For instance, the installation of enclosures, which connect the distribution network of the company to the user's installation, should use cables type Azules. The video provides examples of cable types and their applications, including the use of cables with PVC insulation for general installations and the requirement for fire-resistant cables in specific cases. The video emphasizes the importance of considering fire safety in all installations and the role of the building code in mandating the use of fire-resistant cables in buildings.
  • 00:05:00 In this section of the "Clase bt 2" YouTube video, the speaker discusses various types of electrical cables and their applications. Voltios are practical for making switches due to their tendency not to return to their original position once bent. The cable type "wirepoint ce pro" is a 500-volt industrial cable used in industrial enrolllers and domestic extenders. For installations in provisional works, muebles, and electrodomésticos, a rubber or outdoor enrollador is recommended. The blue cable, as its name suggests, is not armored with galvanized steel wires and is suitable for zones átex. It also provides mechanical protection against rodent or mechanical aggression. The cable must meet the ITC BT-29 regulation's reaction to fire class, and the speaker mentions that they did not have to use a cable like Afumex, although the regulation requires it to be non-propagator of fire. The speaker also discusses cables with shielding to avoid electromagnetic interferences, such as the H07RNF flextreme cables. The cable al polired is a trenzado cable with only insulation, specifically designed for outdoor use and often comes with a neutral conductor for hanging when used for overhead power lines. The speaker also mentions the cable Aluminio a la fumes, which has improved mechanical characteristics and is used for non-public areas with a significant risk of fire. The Retenax c Pro Marinet cable is recommended for motor power supply with variable frequency drives, as it is recommended by the drive manufacturers and has a concentric conductor that acts as both a shield and a protective conductor, making installation more convenient.
  • 00:10:00 In this section of the "Clase bt 2" YouTube video, the speaker discusses the importance of using appropriate cables for various installations, specifically focusing on photovoltaic installations. They explain that interconnections generate many harmonics, which can raise frequency and discharge the skin, acting as a conductor. If impedance mismatches occur between the cable and the motor, unwanted harmonic currents are lost, causing erosion and reducing the motor's lifespan. The speaker mentions several types of cables for photovoltaic installations, including PVcu 2.0 c Pro and those with copper-tinned coated cables, as well as cables made with steel or aluminum corrugated sheathing for better durability against rodents and the outdoor environment. They also mention cables with special armors for communication cables, as they are more vulnerable to rodents. These cables are guaranteed for 30 years in photovoltaic installation conditions. The speaker emphasizes the importance of using appropriate cables for specific applications, such as cables for submerged pumps or fire-resistant cables for alarm systems, to ensure their functionality and longevity.

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