Reading Electrical Blueprints Flashcards
7 cards from real CEA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Reading Electrical Blueprints flashcards as text
On electrical blueprints, 'EWP' beside a receptacle typically means:
Answer: Exterior Weatherproof
EWP stands for Exterior Weatherproof, indicating the receptacle is rated for outdoor or damp-location installation.
What is a 'detail reference bubble' on an electrical drawing used for?
Answer: Pointing to a detail drawing with enlarged information on another sheet
A detail reference bubble contains a number and sheet reference, directing the reader to a larger-scale detail on another drawing.
On a three-phase electrical system single-line diagram, three parallel lines represent:
Answer: A three-phase feeder or circuit
Three parallel lines on a single-line diagram indicate a three-phase conductor arrangement for feeders or branch circuits.
When a blueprint note says 'BY OWNER' next to a piece of equipment, it means:
Answer: The building owner supplies that equipment, not the contractor
'By Owner' means the equipment is furnished by the building owner, and the electrical contractor only connects it.
What does 'AIC' rating on a panel schedule indicate?
Answer: Ampere Interrupting Capacity of the overcurrent device
AIC (Ampere Interrupting Capacity) is the maximum fault current a breaker can safely interrupt without damage.
On an electrical site plan, 'UG' next to a conduit run means:
Answer: Underground installation
UG stands for Underground, indicating the conduit is buried below grade rather than installed above ground.
A 'phantom line' (long-short-long dash) on an electrical blueprint typically indicates:
Answer: Future or alternate work
Phantom lines represent future equipment, alternate configurations, or work not included in the current construction phase.