A professional who draws up specifications and instructions for installation of voltage transformers, overhead or underground cables, and related electrical equipment used to conduct electrical energy from transmission lines or high-voltage distribution lines to consumers. Responsibilities include:

• Studies work order request to determine type of service, such as lighting or power, demanded by installation.
• Visits site of proposed installation and draws rough sketch of location.
• Takes measurements, such as street dimensions, distances to be spanned by wire and cable, or space available in existing buildings and underground vaults which affect installation and arrangement of equipment.
• Estimates materials, equipment, and incidentals needed for installation.
• Draws master sketch showing relation of proposed installation to existing facilities.
• Makes other drawings, such as pertaining to wiring connections or cross sections of underground cables, as required for instructions to installation crew.
• Consults power-distribution engineer (utilities) on difficulties encountered.
• May draft sketches to scale (electrical drafter).
• May estimate labor and material costs, using pricelists and records on previous projects.
• May inspect completed installation of electrical equipment and related building circuitry to verify conformance with specifications.
• May perform duties of land surveyor and prepare specifications and diagrams for installation of gas distribution pipes owned by gas-electric utility.