NCCER Electrical 2 module 9 -Solved
A ground fault is described as - ANSWER-an unintentional electrically conducting
connection between an ungrounded conductor of an electrical circuit and a normally
non current carrying conductor
Where a main bonding jumper is required by NEC, the main bonding jumper cannot
be less than what percentage - ANSWER-12.5%
A ground test utilizing an auxiliary electrode and an auxiliary potential electrode is
known as - ANSWER-3 point test
If single gain nail on non metallic boxes are used with NM cable which of the
following is true, plastic box dont have to - ANSWER-Ground it no connection to the
box is required
The fall of potential method is used to measure what - ANSWER-Earths resistance
Rod, pipe, and plate electrodes must have a reistance to ground of at least -
ANSWER-25ohms
In a separately derived system the equipment bonding jumper connects to the -
ANSWER-system housing to the Neutral bus bar
Which type of system is required to be grounded - ANSWER-AC system over 1kv
that supplies mobile or portable equipment
The size of an EGC Equipment Grounding Conductor is determined by what -
ANSWER-Size of Overcurrent protection device (Breaker)
Which of the following is true when installing grounding at more than one building?
- ANSWER-The grounded circuit conductor and equipment grounding conductor
must both be extended to the second building
A transformer supplied system operating at less than 50v must be grounded is the
supplied voltage to the transformer exceeds - ANSWER-150v
To be effective, a grounding system must limit the voltage on the electrical system
and protect it from - ANSWER-under voltage conditions
A short circuit is a conducting connection between - ANSWER-Any conductors of an
electrical system
Which of the following is a NEC requirement for grounding and bonding - ANSWER-
Continuous system
A ground fault is described as - ANSWER-an unintentional electrically conducting
connection between an ungrounded conductor of an electrical circuit and a normally
non current carrying conductor
Where a main bonding jumper is required by NEC, the main bonding jumper cannot
be less than what percentage - ANSWER-12.5%
A ground test utilizing an auxiliary electrode and an auxiliary potential electrode is
known as - ANSWER-3 point test
If single gain nail on non metallic boxes are used with NM cable which of the
following is true, plastic box dont have to - ANSWER-Ground it no connection to the
box is required
The fall of potential method is used to measure what - ANSWER-Earths resistance
Rod, pipe, and plate electrodes must have a reistance to ground of at least -
ANSWER-25ohms
In a separately derived system the equipment bonding jumper connects to the -
ANSWER-system housing to the Neutral bus bar
Which type of system is required to be grounded - ANSWER-AC system over 1kv
that supplies mobile or portable equipment
The size of an EGC Equipment Grounding Conductor is determined by what -
ANSWER-Size of Overcurrent protection device (Breaker)
Which of the following is true when installing grounding at more than one building?
- ANSWER-The grounded circuit conductor and equipment grounding conductor
must both be extended to the second building
A transformer supplied system operating at less than 50v must be grounded is the
supplied voltage to the transformer exceeds - ANSWER-150v
To be effective, a grounding system must limit the voltage on the electrical system
and protect it from - ANSWER-under voltage conditions
A short circuit is a conducting connection between - ANSWER-Any conductors of an
electrical system
Which of the following is a NEC requirement for grounding and bonding - ANSWER-
Continuous system
