The electrical system should be designed and installed so that live parts shall not be accessible and accessible conductive parts should not cause a hazard to the user.
What it means
Various measures can be employed to protect the users, shielding the live parts with enclosures and insulation are the most common. Additional protection is normally provided with Residual Current Devices.
Insulating the whole system and providing automatic disconnection of the supply definitions are now;
- Basic protection (enclosures, insulation)
- Fault protection (disconnection with mcb’s)
- Additional protection (RCD) where needed