CEA Reading Electrical Blueprints 5

Question 1

On a blueprint, what does the abbreviation 'TVSS' represent?

Accepted Answer

Transient Voltage Surge Suppressor

Answer

TVSS stands for Transient Voltage Surge Suppressor, a device that protects equipment from voltage spikes.

Question 2

On electrical blueprints, a triangle symbol pointing upward at a panelboard typically indicates:

Accepted Answer

The top or line side of the panel

Answer

An upward triangle near a panel or equipment often marks the line (incoming power) side as opposed to the load side.

Question 3

When a blueprint shows 'EQ SP' between lighting fixtures, it means:

Accepted Answer

Equal Spacing between fixtures

Answer

'EQ SP' means Equal Space, instructing the installer to distribute the fixtures evenly between reference points.

Question 4

A blueprint specification calls for '#4 AWG CU GND.' What does 'GND' indicate?

Accepted Answer

The conductor is used as an equipment grounding conductor

Answer

GND designates this conductor as an equipment grounding conductor, providing a fault-current return path for safety.

Question 5

On a wiring diagram (schematic), component symbols differ from a floor plan because they show:

Accepted Answer

The electrical connections and function of components

Answer

Schematic wiring diagrams depict how components are electrically connected and how they function, not their physical placement.

(CEA) Certified Electrical Apprentice Practice Test