Untitled

Play an AI-generated podcast conversation about this lesson

List three reasons to properly ground a system.(Rule: 10-002)

protect wire and conductors, safe equipment and risk free.

to pass the inspection, follow electricals rule, home owner's safety

ground system must apply , foreman asking, electricals shocks .

Improved human safely through lowered voltage-to-ground, improved overcurrent operation, reduced risk of fire. (correct)

Which of the following electrical points should be grounded on a DC 3 - wire system?

positive voltage terminal

negative voltage terminal

neutral voltage terminal (correct)

inserting an impedance grounding device

If the services was grounded at point A, what magnitude and polarity of shock could be felt between point A and ground?

120 volts

0 volts (correct)

240 volts

220

If the service was grounded at point B, what magnitude and polarity of shock could be felt between point B and ground?

0 volts Signup and view all the answers

If the service was grounded at point C, what magnitude polarity of shock could be felt between point C and ground?

0 Signup and view all the answers

Which of the following electrical points should be grounded on an AC-3 wire system( Rule: 10-208)

neutral Signup and view all the answers

What is the maximum voltage to ground allowed for a single phase residential application (Rule: 10-206, 10-208)

150 volts Signup and view all the answers

A electrical system may be grounded at how many electrical points? (Rule: 10-204) & Rule: 10-208(d)

only one electrical point can be grounded Signup and view all the answers

May a single electrical point of a system be grounded at more than one physical location? (Rule: 10-212)

Yes, if it is the same electrical point it may be grounded multiple times. Signup and view all the answers

A system ground goes from the grounding electrode to the ....... inside the main service equipment

Signup and view all the answers

A equipment ground goes from the grounding electrode to the ............... inside the main service equipment.

Signup and view all the answers

What is the minimum number of grounded points that are necessary on a circuit before the overcurrent devices will operate? Rule: 10-212)

Two Signup and view all the answers

A well casing is a form of which of the following: Rule: 10-102(4)

In-situ grounding electrode Signup and view all the answers

Ground rods are a form of which of the following: (Rule: 10-102)

manufactured grounding electrode, field assembled grounding electrode, in-situ grounding electrode. Signup and view all the answers

Where there are multiple grounding electrodes at a building, they shall be: ( Rule: 10-104)

2 m from each other Signup and view all the answers

Which of the following are allowed to be used to bond equipment downstream of the service

EMT, Rigid steel conduit, Aluminum sheath, copper conductors, Aluminum conductors Signup and view all the answers

a bonding conductor is run in the same raceway with other conductors and what is its maximum length? (Rule: 10-612(3)

15 m Signup and view all the answers

How deep must the ground plate be buried ? (Rule: 10-102(2)(c)(i)

In direct contact with exterior soil at not less than 600 mm below grade level. Signup and view all the answers

How many and how far apart must the ground rods? (Rule: 10-102(2)(a)(i)

consist of two rod electrodes and spaced not less than 3 m apart Signup and view all the answers

What materials and gauge must the grounding conductors be? (Rule: 10-114(1)(a)(b)

No. 6 AWG copper , No. 4 AWG aluminum Signup and view all the answers

If the plate electrode were to be encased in a concrete footing, what minimum depth below grade would the plate electrode need to be? Rule: 10-102(2)(c)(ii)

encased within the bottom 50 mm of a concrete foundation footing in direct contact with the earth at not less than 600 mm below finished grade. Signup and view all the answers