Graunding

Question 0

NEC 250.8 require that grounding must be?

Answer 0

Permanent reliable and continues graund

Question 1

_______ is Connected together to establish electrical continuity and conductivity?

Answer 1

Bonding

Question 2

System grounding and bonding relates to the?

Answer 2

Service-entrance equipment

Question 3

A short circuit is a conducting connection whether intonational or accidental between any of the?

Answer 3

Conductor of an electrical system

Question 4

Provide the grounding requirements for AC systems?

Answer 4

NEC 250.20 & 250.21

Question 5

Grounding is require for systems

Answer 5

Less than 50v & if exceeds 150v

Question 6

AC systems over 1000v must be grounded if the they supply?

Answer 6

Mobile or portable equipment

Question 7

Separately derived system is a premises wiring system whose power is derived from a source of electrical energy other than a?

Answer 7

Service

Question 8

Grounded system must limit the voltage on the electrical system and protect it from?

Answer 8

Lighting

Voltage surges

Question 9

Requirements for grounding of service are found in?

Answer 9

NEC 250.24

Question 10

Is made of at last 20 of no.2 or larger bare copper buried not less than 2.5 below grade

Answer 10

Grounding ring

Question 11

Plates made of iron or steel must be at last?

Answer 11

1/4 thick

While nonferrous like copper only 0.06

Question 12

Rod pipes and plates electrodes must have a resistance to ground of?

Answer 12

25 ohms or less

Question 13

Plate electrode must expose not less than 2 square feet of surface to exterior soil must be bare or conductively coated iron or steel at least?

Answer 13

1/4 thick

Question 14

Many locations require two electrodes and must be separate apart by?

Answer 14

No less than 6’ apart

Question 15

is the sole connection between the grounding electrode and the ground system?

Answer 15

The grounding electrode conductor

Question 16

Where the level of the rod has to be

Answer 16

Upper and of rod must be below permanent moisture level if practicable

Question 17

Minimum pipe galvanize allow for used as grounding is?

Answer 17

3/4

Question 18

Equipment grounding conductor refers to?

Answer 18

Connecting the no carrying metal parts of equipment or ground electrode conductor.

Question 19

The size of EGC is determined by?

Answer 19

By the over current device

Question 20

Metal boxes are grounded using a?

Answer 20

Grounding clip or green screw

Question 21

Where the multiple conductors are larger than the maximum given in NEC 250.102 the main jumper cannot be less than?

Answer 21

12.5% of the area at the largest phase conductor.

Question 22

Is the key to successful clearing of ground fault currents.

Answer 22

Electrical continuity

Question 23

Continuity between services equipment and enclosures must be maintained by?

Answer 23

Bonding

Question 24

Clearing ground faults Is protected by?

Answer 24

By opening of the over current device.

Question 25

Maximum disconnect allow on a service?

Answer 25

6

Question 26

Bonding jumper is locate on?

Answer 26

the supply side of the service disconnect.

Question 27

Clearing ground fault the system will be protected by?

Answer 27

Overcurrent device

Question 28

Grounded conductor it provides a?

Answer 28

low-impedance return path for the flow of fault current to the source to facilitate the operation of the overcurrent devices in the circuit.

Question 29

Grounded conductor provides a

Answer 29

low-impedance return path for the flow of fault current to the source to facilitate the operation of the overcurrent devices in the circuit.

Question 30

Neutral is not needed for voltage requirements it still must be run to the?

Answer 30

Service and connected to the grounded electrode conductor and equipment grounding conductor.

Question 31

In a separated garage system the equipment bonding jumper is connected to?

Answer 31

System housing to Neutral bus bar

Question 32

A grounding neutralizer earth ground resistance is known as?

Answer 32

Tree-point method