Grounding Requirements - Section 10

Question 1

What is the difference between a grounding conductor and a grounded conductor.

Answer 1

A grounding conductor is the conductive path between a service box and a grounding electrode. A grounded conductor is an identified/neutral conductor.

Question 2

If a system has a neutral conductor, must it be grounded?

Answer 2

Yes.

Question 3

In a single dwelling which three portions of an electrical installation require grounding?

Answer 3

1. Circuits
2. Service equipment
3. Other equipment.

Question 4

Could one ground gas piping on the street side of a single dwelling gas line?

Answer 4

No, because the pipe would corrode with a large current on it.

Question 5

Would standard locknuts and fittings be suitable to bond a metal service raceway?

Answer 5

No, size a service raceway bonding jumper from table 41.

Question 6

With a hot sequence meter, which colour wire should be used to bond the meter socket to ground?

Answer 6

White (neutral)

Question 7

Why would one bond a gas and water pipe to a grounding system?

Answer 7

So that accidental current imposed on the piping has a path of low impedance and does not cause damage to people or property.

Question 8

When sizing for a busbar installation, which table should be referenced?

Answer 8

16 B

Question 9

Should all metal enclosures be bonded?

Answer 9

Yes except:

• Small runs
  
  • (1.5m) for protection of conductors.
  • (7.5m) where the piping is unlikely to touch ground.

Question 10

When must a grounding conductor be installed in conduit?

Answer 10

When it is # 8 awg or smaller. (In DC circuits normally)