| A | B |
| Brown Out | Power Supply Failure |
| Black Out | Power Supply Loss |
| Uninteruptable Power Supply (UPS | Stops backouts & Brownouts |
| Surge Protector | Stops spikes damaging electrical equipment |
| Residual Current Device | Cuts off power when current leak detected that could cause electrecution |
| Circuit Breaker | Cuts off power when high current could damage equipment |
| Electrical Fire Extinguishers | CO2 Powder |
| Non Electrical Fire Extinguishers | Water |
| Anti Static | Prevents ESD damage |
| PAT Testing frequency | Every 12 months |
| Can Cause ESD Damage | Low Humidity problems , bad connections, moving machinery |
| Ergonomics | Prevents RSI |
| Danger when person grounded | Electric Shock |
| LSZH | Stops Acid fumes when burning |
| PAT : visual inspection | damage to the cable, damage to the plug, damage to the |