Work on Electrical Installations and in premises presenting a fire or explosion hazard
Definitions and concepts:
1. Electrical Installation
The set of materials and equipment at a workplace by means of which electrical energy is generated, converted, transformed, conveyed, distributed or used; including batteries, condensers and any other equipment that stores electricity.
2. Types of Electrical Installations
Depending on the rated voltage, electrical installations are classified as:
- Low Voltage electrical installations: those whose rated voltages are equal to or less than 1000 V for alternating current and 1500 V for direct current.
- High Voltage electrical installations: those whose rated voltages are greater less than 1000 V for alternating current and 1500 V for direct current.
Rated voltages equal to or less than 50 V in alternating current and 75 V in direct current are called Safety Voltages.
3. Electrical Hazard
This is the risk resulting from electrical energy.
Such hazards specifically include:
- Electric shock due to Contact with live parts (direct electric Contact) or earths accidentally placed under voltage (indirect electrical Contact).
- Burns resulting from an electric shock or electric arc.
- Falls and blows as a consequence of an electric shock or arc.
- Fires or explosions caused by electricity.
4. Workplace
Any place a worker may gain access to for work reasons.
5. Work Procedure
A sequence of operations to perform in order to carry out a particular job, including:
- Material resources at work.
- Collective and personal protective equipment.
- The necessary human resources, specifying qualifications, training and assignment of tasks.
6. Danger Zone or Live Work Area
This is the space around live parts in which the presence of an unprotected worker supposes a serious and imminent risk of an electric arc or direct Contact with the live part arising, taking into account the gestures and normal movements that the worker may make without moving around.
