ANSWERS GRADED A+| 2026
What is the recommended minimum insulation resistance test value for a 2,300 volt motor
manufactured in 1993?
100 Megohms
What would be the appropriate maintenance test voltage for a withstand test on a 4.76kV, 2500A rated
metal-enclosed interrupter switchgear with IEEE 386 terminations per NETA standards?
14kVAC / 20 kVDC
NETA MTS-2019 Table 100.2
When applying personal protective grounds, which end is attached first?
Apply ground end clamps first, and remove them last.
Which device would you most likely find used as a main switch on a 4000A low voltage switchgear
installation?
Bolted Pressure Switch (BPS)
,How many letters make up the transformer cooling class code?
4
What does the first letter of the transformer cooling class represent?
Internal cooling medium
What does the second letter of the transformer cooling class represent?
Internal cooling mechanism
What does the third letter of the transformer cooling class represent?
External cooling medium
What does the fourth letter of the transformer cooling class represent?
External cooling mechanism
Prohibited Approach Boundary
, The distance at which qualified personnel should not introduce grounded equipment or
material not insulated for the voltage rating due to the possibility of flashover.
What does SCADA stand for?
Supervisory Control and Data Acquisition
What does ASTM stand for?
American Society for Testing and Materials
What does ANSI stand for?
American National Standards Institute
What is the preferred method of performing primary-injection testing on a low voltage circuit breaker
with ground fault protection?
Use of the manufacturer's test kit or rewiring the neutral CT input is the preferred method of
primary-injection testing on a low voltage circuit breaker with ground fault protection,
otherwise two poles can be connected in series to provide balanced secondary currents to the
trip unit.
At what current level does ventricular fibrillation occur?
, -60 to 100mA in AC systems
-300 to 500mA in DC systems
What is the LET-GO current threshold?
For a 70kg body
75mA DC
15mA AC
Meter Sockets and meter disconnect switches should be connected on the load side of a service
disconnecting means.
FALSE
(NEC Article 230.82)
Which standard addresses equipment grounding?
NFPA 70 (National Electric Code)
A moving iron meter operates by applying current to the coil.
Operating current ( can be AC or DC)