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Terms in this set (16)
the main bonding jumper for 4/0 service conductors is?
2 AWG copper
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?
A concrete-encased electrode used for service grounding electrode must be covered with a minimum of 2"
(50mm) of concrete
when a metal water pipe is used as a grounding electrode, what must be provided around the water meter?
the EGC for a flexible metal conduit connection to a motor supplied with a 15A circuit is?
assuming the use of 75 degrees copper conductors, a 230A commercial service would require?
4/0 service conductor
which of the following is used to connect a ground rod with a grounding conductor?
A grounding clamp
Touch Voltage extends to a distance approximately
3' (1 m)
the maximum distance allowed by NEC to connect a grounding connected to a water pipe after the pipe enters the building is
which conductor(s) are grounded on a single phase threes wire 120/240 system
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
all of the following are suitable materials for ground rods except
the conducting connection wheather intentional or accidental between any of the conductors of an electrical system is known as a?
which of the following copper AWG sizes should be used for the grounding conductor for a 200A service using 3/0 copper conductors?
residental electrical services are grounded by connecting the grounded electrode at the
neutral bus in the main panel board
which of the following is an NEC violation when used as a grounding electrode?
an underground gas line
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