Elements and Performance Criteria
- Prepare to plan electrical installations.
- OHS risk control measures and procedures for carrying out the work are followed.
- The extent and nature of the electrical installation is determined from job specifications.
- Safety and other regulatory requirements to which the electrical installation shall comply are identified, obtained and understood.
- Electricity tariffs required are discussed with appropriate person(s) to ascertain control and metering needs of the installation.
- Arrange installation circuits, control and metering.
- Circuits are arranged to ensure safe and functional operation of the installation.
- Circuits are arranged to comply with technical standards and job specifications and requirements.
- Control and metering of the installation is arranged in accordance with regulatory and local requirements and consumer needs.
- Earthing is arranged to comply with the standards and local energy supplier’s requirements.
- Specify cables, protection and switchgear.
- Fault levels at each relevant point of the installation are determined from calculations and/or information from the local energy supplier’s.
- Suitability of the wiring systems selected is determined to meet requirements for protection against environmental factors and job specifications.
- Cable conductor sizes are determined to meet current-carrying capacity requirements and voltage-drop and fault-loop impedance limitations and short circuit performance.
- Protection methods and devices are specified to meet co-ordination requirements for overload and short-circuit protection.
- Switchgear and control gear are specified to meet fault levels, current, voltage and IP ratings and functional requirements.
- Earthing system components are specified to meet requirements of the earthing system used.
- Evidence is obtained that electrical equipment selected complies with safety requirements.
- Document electrical installation plan.
- Equipment specified for the installation is documented together with supporting calculations in accordance with established procedures.
- Electrical installation arrangement, equipment locations, cable routes and schedules and requirements are documented in accordance with established procedures and forwarded to appropriate person(s).