Limited to a maximum of 2.5% from the Main Distribution Board (MDB) to any final circuit.
Residual Current Devices (RCDs) are mandatory. Sensitivities vary; for instance, 30mA RCDs are typically required for socket outlets and water heaters. sewa regulations for electrical installations pdf repack
Use of 5-wire systems (including separate neutral and protective conductors) for three-phase and 3-wire for single-phase. 2. Mandatory Protection Devices Limited to a maximum of 2