NM ES-3 Test (New Mexico Low Voltage Journeyman) Complete Study Guide 2026–2027 | Latest Practice Questions & Verified Answers with Detailed Rationales | New Updated Version | Graded A+

NM ES-3 Test
(New Mexico Low Voltage Journeyman) Complete Study Guide
2026–2027 | Latest Practice Questions & Verified Answers with
Detailed Rationales | New Updated Version | Graded A+



THIS EXAM INCLUDES:
• Questions & Answers Graded A+
• New Updated Version 2026–2027
• Verified Answers with Detailed Rationales
• Latest NM ES-3 Practice Questions
• Comprehensive Low Voltage Journeyman Exam Review
• High-Yield Practice Questions
• Multiple-Choice Exam Preparation
• Exam Tips & Test-Taking Strategies
• Comprehensive Final Review
• Instant Digital Download

, NM ES-3 Test (New Mexico Low Voltage Journeyman)
Complete Study Guide 2026–2027 | Latest Practice
Questions & Verified Answers with Detailed Rationales |
New Updated Version | Graded A+

Question 1

NFPA 72: What is the NFPA code that specifically addresses household
firefighting equipment (fire alarm and signaling systems)?
A) NFPA 70
B) NFPA 72
C) NFPA 101
D) NFPA 13

Answer: B
Rationale: NFPA 72 is the National Fire Alarm and Signaling Code. It covers
the installation, performance, testing, and maintenance of fire alarm
systems, including household firefighting equipment (smoke detectors,
strobes, pull stations, etc.). NFPA 70 is the NEC, NFPA 101 is the Life Safety
Code, and NFPA 13 covers sprinkler systems.


Question 2

(NEC 725.179 E) Type PLTC (Power-Limited Tray Cable) nonmetallic
sheathed cable shall be a minimum size ____ gauge for Class 3 circuits
and have an insulation rating of at least 300 V.
A) 18 gauge
B) 20 gauge
C) 22 gauge
D) 24 gauge

,Answer: C
Rationale: NEC 725.179(E) specifically requires PLTC cable used in Class 3
circuits to be at least 22 AWG. Smaller gauges (24) are not permitted for
mechanical durability, while 18 and 20 are larger than the minimum but not
the correct code-specified minimum.


Question 3

Grounding Connection: In a manufactured home, what is the primary
function of the green insulated conductor in the supply cord or feeder
wiring?
A) Carries the neutral return current
B) Provides the grounding (bonding) connection to the service equipment
C) Supplies 120V to the subpanel
D) Acts as a secondary hot leg for 240V appliances

Answer: B
Rationale: Per NEC 550.16, the green insulated conductor is the equipment
grounding conductor. Its function is to connect the manufactured home's
grounding bus to the service ground in the service equipment, ensuring a
safe path for fault current.


Question 4

What is the minimum required clearance between a receiving antenna
and a 250-volt uninsulated power line?
A) 1 Foot
B) 2 Feet
C) 3 Feet
D) 6 Feet

, Answer: B
Rationale: NEC 810.13 requires a minimum clearance of 2 feet between an
antenna and uninsulated conductors (such as 250V lines) to prevent arcing
or physical contact that could energize the antenna.


Question 5

What is the maximum number of supervisory switches permitted to be
connected to actuate a single transmitter?
A) 10
B) 15
C) 20
D) 25

Answer: C
Rationale: NFPA 72 limits the number of supervisory switches to 20 per
transmitter to ensure that the signal integrity is maintained and to prevent
overloading the transmitter’s input circuits.


Question 6

(NEC 725.179 H) According to NEC, Class 3 circuits are permitted a
minimum wire size of what gauge?
A) 16 gauge
B) 18 gauge
C) 20 gauge
D) 22 gauge

Answer: B
Rationale: NEC 725.179(H) establishes 18 AWG as the minimum conductor
size for Class 3 circuits to provide adequate mechanical strength and
current-carrying capacity for power-limited applications.