CAD Specialist Electrical and Electronics Design Flashcards
7 cards from real CAD practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 CAD Specialist Electrical and Electronics Design flashcards as text
What does a 'single-line diagram' (SLD) represent in power system electrical CAD?
Answer: A simplified topology diagram using one line to represent multi-phase conductors
A single-line diagram uses one line to represent all conductors (e.g., all three phases of a three-phase system) to show power system topology and protection coordination without drawing each wire.
According to the National Electrical Code (NEC), what color identifies the equipment grounding conductor in US installations?
Answer: Green, green with yellow stripes, or bare copper
NEC Article 250 specifies that equipment grounding conductors must be green, green with yellow stripes, or bare (uninsulated) copper.
In AutoCAD Electrical, what does the 'wire numbering' tool accomplish?
Answer: Assigns unique wire tags to nets for identification in panel wiring and field installation
Wire numbering assigns unique identifiers (wire tags) to electrical nets, enabling technicians to trace and verify individual wires by number during panel assembly and troubleshooting.
What does a 'normally open' (NO) contact symbol indicate in an electrical wiring diagram?
Answer: The contact is open (no current flows) in its default de-energized state
A normally open contact is open — no current flows — when the controlling device (relay, contactor, pushbutton) is de-energized, and it closes to allow current when energized.
What is the purpose of a 'from-to list' (wire list) generated by electrical CAD software?
Answer: Lists each wire connection by its start terminal and end terminal to guide panel wiring
A from-to list documents every electrical connection with its source terminal and destination terminal, giving panel builders a complete, actionable wiring roadmap.
What does IEC 61439 govern in relation to electrical equipment design and documentation?
Answer: Low-voltage switchgear and controlgear assemblies such as motor control centers
IEC 61439 specifies the design, testing, and verification requirements for low-voltage switchgear and controlgear assemblies, including distribution panels and motor control centers.
In electrical panel design software such as AutoCAD Electrical or EPLAN, what is a 'macro'?
Answer: A pre-built, reusable component or circuit block inserted to accelerate repetitive design work
A macro is a saved, reusable block of components or circuit segments that designers insert into new projects to avoid redrawing common circuit patterns from scratch.