CBI Electrical Systems Inspection 2

Question 1

What is proper grounding and why is it essential in electrical systems?

Accepted Answer

Connecting electrical systems to earth ground to provide a safe path for fault currents and prevent shock hazards

Answer

Burying electrical wires underground

Answer

Painting conduit green

Answer

Attaching wires to the floor

Question 2

What is the difference between a 15-amp and 20-amp circuit?

Accepted Answer

A 20-amp circuit uses 12-gauge wire and handles higher loads; a 15-amp circuit uses 14-gauge wire for lighter loads

Answer

They are identical except for the breaker size

Answer

20-amp circuits are only for industrial use

Answer

15-amp circuits carry more power

Question 3

What is the purpose of a main electrical panel inspection?

Accepted Answer

To verify proper installation, correct breaker sizing, appropriate wire connections, grounding, and safe clearances

Answer

To check if the panel door closes properly

Answer

To count the number of circuits

Answer

To verify the electricity bill is correct

Question 4

What is a tamper-resistant receptacle and where is it required?

Accepted Answer

A receptacle with internal shutters that prevent insertion of foreign objects, required in all new residential construction

Answer

A receptacle with a lock on the cover

Answer

An outlet that requires a key to operate

Answer

A childproof outlet cover plate

Question 5

What wire types are approved for residential branch circuit wiring?

Accepted Answer

NM cable (Romex) for dry locations and UF cable for underground/wet locations in most residential applications

Answer

Any type of wire can be used anywhere

Answer

Only metal-clad cable is approved

Answer

Residential wiring has no wire type requirements

Question 6

What should an inspector verify about bathroom exhaust ventilation?

Accepted Answer

That a mechanical exhaust fan vented to the exterior is installed in every bathroom, or that an operable window of adequate size is provided

Answer

Exhaust fans are optional in all bathrooms

Answer

Only bathrooms with showers need ventilation

Answer

Bathroom ventilation is not part of building inspection