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 a blueprint, what does the abbreviation 'TVSS' represent?
Answer: Transient Voltage Surge Suppressor
TVSS stands for Transient Voltage Surge Suppressor, a device that protects equipment from voltage spikes.
On electrical blueprints, a triangle symbol pointing upward at a panelboard typically indicates:
Answer: The top or line side of the panel
An upward triangle near a panel or equipment often marks the line (incoming power) side as opposed to the load side.
When a blueprint shows 'EQ SP' between lighting fixtures, it means:
Answer: Equal Spacing between fixtures
'EQ SP' means Equal Space, instructing the installer to distribute the fixtures evenly between reference points.
A blueprint specification calls for '#4 AWG CU GND.' What does 'GND' indicate?
Answer: The conductor is used as an equipment grounding conductor
GND designates this conductor as an equipment grounding conductor, providing a fault-current return path for safety.
On a wiring diagram (schematic), component symbols differ from a floor plan because they show:
Answer: The electrical connections and function of components
Schematic wiring diagrams depict how components are electrically connected and how they function, not their physical placement.
What does 'T-stat' or 'TSTAT' abbreviation on an electrical blueprint refer to?
Answer: Thermostat control device
T-stat or TSTAT is the standard abbreviation for thermostat, shown where a temperature-control device will be installed.
A blueprint detail shows a conduit penetrating a fire-rated wall with 'FIRE SEAL REQ'D.' This means:
Answer: A listed firestop system must be installed around the conduit
Fire seal required means an approved firestop material or assembly must seal the annular space where conduit penetrates the fire-rated assembly.