NM ES-3 TEST (NEW MEXICO LOW VOLTAGE JOURNEYMAN) EXAM –
QUESTIONS AND ANSWERS | VERIFIED AND WELL DETAILED ANSWERS | PLUS
RATIONALES | DOWNLOAD AND PASS | LATEST EXAM UPDATE
Core Domains
• Electrical Theory and Fundamentals
• National Electrical Code (NEC) Applications for Low Voltage Systems
• New Mexico State Electrical Regulations and Licensing Requirements
• Fire Alarm and Life Safety Systems
• Telecommunication and Data Cabling (Structured Cabling Systems)
• Security and Access Control Systems
• Audio/Video and Sound Systems
• Safety Practices and OSHA Standards
• System Design, Installation, and Testing Procedures
Introduction
This comprehensive examination is designed to rigorously assess the knowledge and
practical skills required for a Low Voltage Journeyman in the state of New Mexico.
The test covers a wide range of critical areas, from foundational electrical theory
and the intricacies of the National Electrical Code to the specific regulatory
landscape of New Mexico. Candidates will face a mix of multiple-choice and
scenario-based questions that challenge their understanding and ability to apply
concepts in real-world situations. Emphases are placed on decision-making,
troubleshooting, and ensuring the safe and effective implementation of low voltage
systems, preparing candidates to meet the professional standards demanded in the
field.
SECTION ONE: QUESTIONS 1 – 50
,1. According to the NEC, what is the maximum allowable voltage for a "low
voltage" circuit typically referenced in Class 2 and 3 circuits?
A. 600 volts
B. 120 volts
C. 150 volts to ground
D. 1000 volts
🟢 Correct Answer: C. 150 volts to ground
🔴 Explanation: Under the National Electrical Code (NEC), Class 2 and 3 circuits
are generally limited to 150 volts to ground. This distinguishes them from higher
voltage power systems and dictates specific installation requirements for safety.
2. The New Mexico Electrical Bureau is a division of which state agency?
A. New Mexico Public Regulation Commission
B. New Mexico Environment Department
C. New Mexico Department of Workforce Solutions
D. New Mexico Regulation and Licensing Department
🟢 Correct Answer: D. New Mexico Regulation and Licensing Department
🔴 Explanation: The New Mexico Electrical Bureau is a bureau within the
Construction Industries Division (CID) of the New Mexico Regulation and
Licensing Department (NMRLD). This agency oversees licensing and regulation for
all electrical work in the state.
3. What is the primary purpose of a plenum-rated cable (e.g., CMP)?
A. Increased resistance to physical damage
B. Higher data transmission speeds
C. Ability to withstand direct burial
D. Low smoke and flame spread characteristics
🟢 Correct Answer: D. Low smoke and flame spread characteristics
,🔴 Explanation: Plenum-rated cables are designed to be installed in air-handling
spaces (plenums). They are required to have low smoke production and flame
spread characteristics to prevent toxic fumes from traveling through a building's
ventilation system in case of a fire.
4. In a structured cabling system, what does the term "horizontal cabling" refer
to?
A. Cabling that connects equipment rooms to the internet service provider
B. Cabling between the telecommunications room and the individual work area
outlets
C. The backbone cabling between different buildings on a campus
D. Cabling within the main equipment room connecting servers to switches
🟢 Correct Answer: B. Cabling between the telecommunications room and the
individual work area outlets
🔴 Explanation: Horizontal cabling is the portion of a structured cabling system
that extends from the telecommunications room (TR) to the work area outlets,
typically covering a single floor. It includes the cable, connectors, and termination
hardware.
5. A fire alarm system's primary power source must be supplied from a
dedicated branch circuit. What color wire is typically required for the
ungrounded (hot) conductor of this circuit?
A. White
B. Green
C. Red
D. Black
🟢 Correct Answer: C. Red
🔴 Explanation: The NEC (Article 760.121) generally requires that the ungrounded
conductor for a fire alarm circuit be distinct and continuously red in color to
, readily identify it as a life safety circuit and ensure it is not inadvertently
connected to other circuits.
6. Which of the following is the BEST description for the "ampacity" of a
conductor?
A. The voltage rating of the insulation
B. The physical size of the conductor in circular mils
C. The maximum continuous current a conductor can carry without exceeding its
temperature rating
D. The resistance of the conductor per one thousand feet
🟢 Correct Answer: C. The maximum continuous current a conductor can carry
without exceeding its temperature rating
🔴 Explanation: Ampacity is defined as the maximum current, in amperes, that a
conductor can carry continuously under the conditions of use without its
temperature exceeding its rating. This is a critical factor in selecting proper wire
sizes.
7. What is the minimum bending radius for a typical Category 6 unshielded
twisted-pair (UTP) cable during installation?
A. The radius is not specified
B. Four times the cable diameter
C. Two times the cable diameter
D. Ten times the cable diameter
🟢 Correct Answer: A. The radius is not specified
🔴 Explanation: The question is a bit of a trick. Unlike many other cables (like
coax), industry standards and manufacturer specifications for UTP cable,
particularly Category 6, typically do not specify a minimum bending radius.
Instead, they state that bend radius should not be exceeded, but often the
requirement is simply not to kink or crush it. The industry standard TIA/EIA-568
QUESTIONS AND ANSWERS | VERIFIED AND WELL DETAILED ANSWERS | PLUS
RATIONALES | DOWNLOAD AND PASS | LATEST EXAM UPDATE
Core Domains
• Electrical Theory and Fundamentals
• National Electrical Code (NEC) Applications for Low Voltage Systems
• New Mexico State Electrical Regulations and Licensing Requirements
• Fire Alarm and Life Safety Systems
• Telecommunication and Data Cabling (Structured Cabling Systems)
• Security and Access Control Systems
• Audio/Video and Sound Systems
• Safety Practices and OSHA Standards
• System Design, Installation, and Testing Procedures
Introduction
This comprehensive examination is designed to rigorously assess the knowledge and
practical skills required for a Low Voltage Journeyman in the state of New Mexico.
The test covers a wide range of critical areas, from foundational electrical theory
and the intricacies of the National Electrical Code to the specific regulatory
landscape of New Mexico. Candidates will face a mix of multiple-choice and
scenario-based questions that challenge their understanding and ability to apply
concepts in real-world situations. Emphases are placed on decision-making,
troubleshooting, and ensuring the safe and effective implementation of low voltage
systems, preparing candidates to meet the professional standards demanded in the
field.
SECTION ONE: QUESTIONS 1 – 50
,1. According to the NEC, what is the maximum allowable voltage for a "low
voltage" circuit typically referenced in Class 2 and 3 circuits?
A. 600 volts
B. 120 volts
C. 150 volts to ground
D. 1000 volts
🟢 Correct Answer: C. 150 volts to ground
🔴 Explanation: Under the National Electrical Code (NEC), Class 2 and 3 circuits
are generally limited to 150 volts to ground. This distinguishes them from higher
voltage power systems and dictates specific installation requirements for safety.
2. The New Mexico Electrical Bureau is a division of which state agency?
A. New Mexico Public Regulation Commission
B. New Mexico Environment Department
C. New Mexico Department of Workforce Solutions
D. New Mexico Regulation and Licensing Department
🟢 Correct Answer: D. New Mexico Regulation and Licensing Department
🔴 Explanation: The New Mexico Electrical Bureau is a bureau within the
Construction Industries Division (CID) of the New Mexico Regulation and
Licensing Department (NMRLD). This agency oversees licensing and regulation for
all electrical work in the state.
3. What is the primary purpose of a plenum-rated cable (e.g., CMP)?
A. Increased resistance to physical damage
B. Higher data transmission speeds
C. Ability to withstand direct burial
D. Low smoke and flame spread characteristics
🟢 Correct Answer: D. Low smoke and flame spread characteristics
,🔴 Explanation: Plenum-rated cables are designed to be installed in air-handling
spaces (plenums). They are required to have low smoke production and flame
spread characteristics to prevent toxic fumes from traveling through a building's
ventilation system in case of a fire.
4. In a structured cabling system, what does the term "horizontal cabling" refer
to?
A. Cabling that connects equipment rooms to the internet service provider
B. Cabling between the telecommunications room and the individual work area
outlets
C. The backbone cabling between different buildings on a campus
D. Cabling within the main equipment room connecting servers to switches
🟢 Correct Answer: B. Cabling between the telecommunications room and the
individual work area outlets
🔴 Explanation: Horizontal cabling is the portion of a structured cabling system
that extends from the telecommunications room (TR) to the work area outlets,
typically covering a single floor. It includes the cable, connectors, and termination
hardware.
5. A fire alarm system's primary power source must be supplied from a
dedicated branch circuit. What color wire is typically required for the
ungrounded (hot) conductor of this circuit?
A. White
B. Green
C. Red
D. Black
🟢 Correct Answer: C. Red
🔴 Explanation: The NEC (Article 760.121) generally requires that the ungrounded
conductor for a fire alarm circuit be distinct and continuously red in color to
, readily identify it as a life safety circuit and ensure it is not inadvertently
connected to other circuits.
6. Which of the following is the BEST description for the "ampacity" of a
conductor?
A. The voltage rating of the insulation
B. The physical size of the conductor in circular mils
C. The maximum continuous current a conductor can carry without exceeding its
temperature rating
D. The resistance of the conductor per one thousand feet
🟢 Correct Answer: C. The maximum continuous current a conductor can carry
without exceeding its temperature rating
🔴 Explanation: Ampacity is defined as the maximum current, in amperes, that a
conductor can carry continuously under the conditions of use without its
temperature exceeding its rating. This is a critical factor in selecting proper wire
sizes.
7. What is the minimum bending radius for a typical Category 6 unshielded
twisted-pair (UTP) cable during installation?
A. The radius is not specified
B. Four times the cable diameter
C. Two times the cable diameter
D. Ten times the cable diameter
🟢 Correct Answer: A. The radius is not specified
🔴 Explanation: The question is a bit of a trick. Unlike many other cables (like
coax), industry standards and manufacturer specifications for UTP cable,
particularly Category 6, typically do not specify a minimum bending radius.
Instead, they state that bend radius should not be exceeded, but often the
requirement is simply not to kink or crush it. The industry standard TIA/EIA-568
