Electrical drawings

Process and instrumentation drawings and detailed instrument and electrical drawings... 

Water for injection Steam distribution Compressed air distribution Nitrogen distribution Drainage system Personnel flow Materials flow Electrical drawings Equipment installation drawings... 

All programs for drives, PLCs, etc., shall be sufficiently annotated and correspond accurately to electrical drawings. 

Electrical drawings—graphical representations that use symbols and diagrams to depict an electrical process system. 

Electrical drawings include symbols and diagrams that depict an electrical process system. Electrical drawings show unit electricians where power transmission lines run and places where it is stepped down or up for operational purposes. A complex P ID is designed to be used by a variety of crafts. The primary users of the document after plant start-up are process technicians, instrument and electrical, mechanical, safety, and engineering. 

A process technician typically traces power to the unit from a motor control center (MCC). The primary components of an electrical system are the MCC, motors, transformers, breakers, fuses, switch gears, starters, and switches. Specific safety rules apply to the operation of electrical systems. The primary safety system is the isolation of hazardous energy through lock-out/tag-out measures. Process technicians are required to have training in this area. Figure 7-22 shows the basic symbols and flow path associated with an electrical drawing. Electrical lines are typically run in cable trays to switches, motors, ammeters, substations, and control rooms. 

Wiring connections agree with loop and electrical drawings. 

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