NEC Overcurrent Protection & Grounding 1

Question 1

What is the purpose of overcurrent protection devices?

Accepted Answer

To protect against excessive current

Answer

To measure voltage levels

Answer

To store electrical energy

Answer

To increase circuit resistance

Question 2

Which NEC article governs overcurrent protection?

Accepted Answer

Article 240

Answer

Article 250

Answer

Article 300

Answer

Article 110

Question 3

Which device is commonly used for branch circuit overcurrent protection?

Accepted Answer

Circuit breaker

Answer

Surge protector

Answer

Transfer switch

Answer

Contactor

Question 4

What does grounding provide in an electrical system?

Accepted Answer

A safe path for fault current

Answer

A return path for neutral conductors

Answer

A connection to generators

Answer

A backup power supply

Question 5

Which article in the NEC covers grounding and bonding?

Accepted Answer

Article 250

Answer

Article 240

Answer

Article 310

Answer

Article 110

Question 6

What is a grounding electrode?

Accepted Answer

A device that connects a system to earth

Answer

A type of overcurrent device

Answer

A fuse holder

Answer

A battery terminal

Question 7

Which conductor connects the grounding electrode to the system?

Accepted Answer

Grounding electrode conductor

Answer

Neutral conductor

Answer

Equipment grounding conductor

Answer

Overload conductor

Question 8

How does bonding differ from grounding?

Accepted Answer

Bonding connects metal parts together

Answer

Bonding prevents short circuits

Answer

Bonding provides a path to earth

Answer

Bonding replaces grounding

Question 9

Which condition could result from a missing or broken ground connection?

Accepted Answer

Fire and shock hazard

Answer

Increased energy efficiency

Answer

Reduced voltage levels

Answer

Stronger signal strength