309A Grounding and Bonding 2

Question 1

What is the purpose of the bonding jumper at a service panel?

Accepted Answer

To connect the neutral bus to the equipment grounding bus

Answer

To connect the panel to the water pipe only

Answer

To provide overcurrent protection

Answer

To isolate the neutral from ground

Question 2

Why must the neutral and ground be bonded at only one point in a distribution system?

Accepted Answer

To prevent objectionable current flow on equipment grounding conductors

Answer

To save on materials

Answer

To increase system capacity

Answer

To comply with utility requirements only

Question 3

What is the purpose of an equipment bonding conductor in a raceway system?

Accepted Answer

To provide a low-impedance path for fault current back to the source

Answer

To carry normal load current

Answer

To act as the neutral conductor

Answer

To provide lightning protection

Question 4

According to the CEC, what is the minimum bonding conductor size for a circuit protected by a 60 A breaker?

Accepted Answer

No. 10 AWG

Answer

No. 14 AWG

Answer

No. 12 AWG

Answer

No. 8 AWG

Question 5

What is an intersystem bonding termination?

Accepted Answer

A device providing connection points for bonding communication system grounds to the power system ground

Answer

A connector for bonding plumbing to electrical systems

Answer

A type of ground rod connector

Answer

A lightning arrestor mounting point

Question 6

What material must not be used as a sole grounding electrode?

Accepted Answer

Aluminium rod driven into the earth

Answer

Copper rod

Answer

Cast iron water pipe

Answer

Concrete-encased rebar