Minimum cross-section conductors permitted in low-voltage distribution networks shall be: 16mm aluminum.
If the first phase section is 95mm, the branching section for feeding shall be: 50mm.
When conductors are buried in the ground, protected against corrosion and deterioration, the minimum cross-section shall be: 16mm copper and 16mm galvanized steel.
Distribution Schemes and Connections
In the T-S distribution scheme: The neutral conductor shall be separate from the protective conductor throughout the entire scheme.
The electricity supply company is obliged to supply the first single-phase power connection with a maximum of: 14490W at 230V.
Service connections from outside the property domain are not permitted on public land or any other type of land without proper authorization.
The installation scheme for connections normally intended for residential buildings shall involve: The placement of all meters in a single location.
Can the fuses of a Current Transformer (CT) box be considered part of the General Distribution Panel (CGP)? Only if the CT is located within the same building.
Safety and Protection
Covers for inspection pits or register grooves must be at a minimum height of: 0.20 meters from the ground.
Safety fuses shall be placed: In each phase conductor.
In public gathering places, General Main Panels (GMP) must be located: Accessible, but not in a place directly accessible to the public.
In interior installations, the emergency power supply may be disconnected from: Any facility that originates from a command panel.
Regarding the protection characteristics of a conduit and its accessories: Ensure compatibility with the characteristics of the superior protection device for the conduit.
What is the maximum voltage value that exposed metallic parts of an interior electrical installation can acquire before automatic disconnection for protection? 50 Volts.
Circuit Design and Usage
In a dwelling with an additional washing area, a dedicated circuit must be installed to supply lighting points: For every 30 lighting points.
Can the same neutral conductor be used for several circuits in interior installations within homes? Never.
Specific Locations and Risks
In a location without a shower tray, the volume delimited as Zone 0 is: The horizontal ground plane located 5cm from the floor.
Locations with corrosion risk are defined as: Those where gases or the electrical materials used may damage the installation.
Automation and Smart Systems
In installations utilizing automation and management techniques for housing, regarding safety conductors intended for sending and receiving automation system signals: It may be required that the channeling for these conductors, when alongside other circuits, must maintain an isolation level equivalent to that of the adjacent circuit cables.
In installations utilizing automation and management techniques for housing safety: Can systems be installed that use the electrical installation's own conductors as a transmission medium? Yes, if feasible, this is permissible.
