Cables, Protection and Installation Practice
Lesson index for this training block.
Cable Types and Identification
TPS, SDI, flexible cords, screened cable, data cable, colour identification and marking.
Cable Selection Process
Load current, installation method, derating, voltage drop and protective device coordination.
Voltage Drop in Real Installations
Calculating drop, recognising long-run problems and choosing practical remedies.
Protective Devices: Fuses, MCBs and RCBOs
Thermal/magnetic operation, fault protection, overload protection and nuisance trips.
RCDs and Shock Protection
Residual current operation, test button limitations, leakage current and selectivity issues.
Earthing, Bonding and Fault Paths
MEN thinking, protective earthing conductors and equipotential bonding.
Switchboards and Circuit Schedules
Layout, labelling, segregation, spare capacity and serviceability.
Lighting Circuits and Switching Methods
One-way, two-way, intermediate, sensor and smart switching concepts.
Socket Outlet Circuits
Radial final circuits, load assumptions, terminations and testing points.
Conduit, Trunking and Mechanical Protection
Physical protection, draw-in points, bends, fill and environmental exposure.
Wet Areas and External Installations
IP ratings, zones, corrosion, UV exposure, condensation and suitable accessories.
Appliance Connections and Fixed Equipment
Isolators, local control, flexible connections, load assessment and maintenance access.