eest 16

A concrete-encased electrode used for service grounding electrode must be covered with a minimum of 2"

(50mm) of concrete

the EGC for a flexible metal conduit connection to a motor supplied with a 15A circuit is?

14AWG Copper

the main bonding jumper for 4/0 service conductors is?

2 AWG copper

Touch Voltage extends to a distance approximately

3' (1 m)

if you are bounding multiple disconnects and the size of the service entrance conductor is 3/0,the size of the bonding jumper is?

4 AWG copper

assuming the use of 75 degrees copper conductors, a 230A commercial service would require?

4/0 service conductor

the maximum distance allowed by NEC to connect a grounding connected to a water pipe after the pipe enters the building is

5 (1.5m)

a single phase system has two legs, Leg A and Leg B if leg a is carrying 30A , the current carried by the neutral is?

5A

which of the following is used to connect a ground rod with a grounding conductor?

A grounding clamp

all of the following are suitable materials for ground rods except

aluminum

which of the following is an NEC violation when used as a grounding electrode?

an underground gas line

when a metal water pipe is used as a grounding electrode, what must be provided around the water meter?

bonding jumper

which conductor(s) are grounded on a single phase threes wire 120/240 system

neutral

residental electrical services are grounded by connecting the grounded electrode at the

neutral bus in the main panel board

which of the following copper AWG sizes should be used for the grounding conductor for a 200A service using 3/0 copper conductors?

no. 4

the conducting connection wheather intentional or accidental between any of the conductors of an electrical system is known as a?

short circuit