CEA Reading Electrical Blueprints 2

Question 1

On an electrical blueprint, what does a dashed line typically represent?

Accepted Answer

A conduit run above the ceiling or hidden

Answer

Dashed lines on electrical plans commonly indicate conduit or wiring concealed above ceilings or within walls.

Question 2

What is the purpose of a 'homerun' arrow on an electrical floor plan?

Accepted Answer

It indicates the circuit route back to the panelboard

Answer

A homerun arrow points toward the panelboard, indicating where that circuit's conductors return for overcurrent protection.

Question 3

On a blueprint riser diagram, what information is primarily shown?

Accepted Answer

Vertical routing of electrical systems between floors

Answer

A riser diagram illustrates how electrical services and feeders travel vertically through a multistory building.

Question 4

Which blueprint symbol typically represents a single-pole switch?

Accepted Answer

S with no subscript

Answer

A plain 'S' with no subscript on electrical plans represents a standard single-pole switch.

Question 5

On an electrical plan, what does 'NIC' stand for?

Accepted Answer

Not In Contract

Answer

'NIC' means Not In Contract, indicating work shown on the drawing that is excluded from the current scope.

(CEA) Certified Electrical Apprentice Practice Test