The purpose of maintenance is to keep an electrical installation in the required condition.
Maintenance may consist of
- preventive maintenance
carried out on a routine basis with the intention of preventing breakdown and keeping equipment in good condition, or - corrective maintenance
carried out to repair or replace a defective part.
There are two types of maintenance work:
- work where the risk of electric shocks, short-circuit or arcing is present and therefore the appropriate working procedures shall apply;
- work where the design of equipment enables certain maintenance (for example replacement of fuses or light bulbs) to be undertaken safely without full working procedures as described in shall be applied.
Where necessary, the rules according to one of the work procedures shall apply.