1.1 Overview of electrical safety+ 1.2 Security basics+ 2.1 Organizational measures+ 2.2 Technical measures+ 3.1 Insulation measures+ 3.2 Spacing and Screening+ 3.3 Protective earthing Protective zeroing + 3.4 Residual current protectors Safe voltage + 4.1 Lightning generation and hazards + 4.2 Lightning protection+ 5.1 Causes of electrical fires and explosions + 5.2 General measures for electrical fire and explosion prevention + 6.1 Basic safety equipment+ 6.2 Ancillary safety equipment+