Electrical Installation Standards and Safety Requirements

Conductor Specifications

• 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.