NM ES-3 EXAMS SET 2026 TESTED
QUESTIONS WITH DETAILED SOLUTIONS
GRADED A+
●● What is the minimum separation between a class 1 fire alarm circuit
conductor and a class 2 or class 3 circuit?
Answer: 1/4 inch
●● A basic alarm system will have __ power sources.
Answer: 2
●● What is the minimum required clearance between a receiving
antenna and 250 volt line not insulated?
Answer: 2 Feet
●● The minimum clearance for an antenna to other conductors is?
Answer: 2 Feet (NEC 810.13)
●● How far away must communications cables be from electric, light, or
power conductors
Answer: 2 inches
,●● what is the maximum blink rate on a strobe light per second?
Answer: 2 (NFPA 72 18.5.2.1)
●● On a voice alarm system what is the minimum number of cycles it
has to report an evacuation procedure?
Answer: 2 (NFPA 72 24.4.1.2.1)
●● What is the minimum required height for a propriety manual pull fire
alarm?
Answer: 3 1/2 feet or 42 inches
●● An overhead feeder must have a clearance of __ from chimneys,
radio, and television antennas.
Answer: 3 Feet (NEC 225.19 B)
●● The NEC classifies Continuous Load as equipment running at a
maximum load of __ ____?
Answer: 3 hours
●● A continuous load is a load where the maximum current is expected
to continue for a certain length of time. This amount of time is?
Answer: 3 hours or more
, ●● The minimum head room of working space above service equipment,
switchboards, panel boards, or motor control centers shall be at least:
Answer: 6.5 feet
●● What is the minimum required separation between communication
cables and lighting conductors?
Answer: 6 feet
●● What is the minimum separation required between coaxial cable in a
CATV system and lighting conductors
Answer: 6 feet
●● On a radio antenna receiving station what is the minimum clearance
between lead-in conductors and conductors forming a part of a lightning
protection system?
Answer: 6 feet
●● What is the minimum length of a grounding rod in an application of
less than 50 volts?
Answer: 8 Feet (NEC 250.5.2.5)
●● Utility owned low-voltage communication, radio, and television
coaxial cables may pass directly over a pool if at a minimum height of:
Answer: 10 feet
QUESTIONS WITH DETAILED SOLUTIONS
GRADED A+
●● What is the minimum separation between a class 1 fire alarm circuit
conductor and a class 2 or class 3 circuit?
Answer: 1/4 inch
●● A basic alarm system will have __ power sources.
Answer: 2
●● What is the minimum required clearance between a receiving
antenna and 250 volt line not insulated?
Answer: 2 Feet
●● The minimum clearance for an antenna to other conductors is?
Answer: 2 Feet (NEC 810.13)
●● How far away must communications cables be from electric, light, or
power conductors
Answer: 2 inches
,●● what is the maximum blink rate on a strobe light per second?
Answer: 2 (NFPA 72 18.5.2.1)
●● On a voice alarm system what is the minimum number of cycles it
has to report an evacuation procedure?
Answer: 2 (NFPA 72 24.4.1.2.1)
●● What is the minimum required height for a propriety manual pull fire
alarm?
Answer: 3 1/2 feet or 42 inches
●● An overhead feeder must have a clearance of __ from chimneys,
radio, and television antennas.
Answer: 3 Feet (NEC 225.19 B)
●● The NEC classifies Continuous Load as equipment running at a
maximum load of __ ____?
Answer: 3 hours
●● A continuous load is a load where the maximum current is expected
to continue for a certain length of time. This amount of time is?
Answer: 3 hours or more
, ●● The minimum head room of working space above service equipment,
switchboards, panel boards, or motor control centers shall be at least:
Answer: 6.5 feet
●● What is the minimum required separation between communication
cables and lighting conductors?
Answer: 6 feet
●● What is the minimum separation required between coaxial cable in a
CATV system and lighting conductors
Answer: 6 feet
●● On a radio antenna receiving station what is the minimum clearance
between lead-in conductors and conductors forming a part of a lightning
protection system?
Answer: 6 feet
●● What is the minimum length of a grounding rod in an application of
less than 50 volts?
Answer: 8 Feet (NEC 250.5.2.5)
●● Utility owned low-voltage communication, radio, and television
coaxial cables may pass directly over a pool if at a minimum height of:
Answer: 10 feet
