NEW MEXICO EE98 RESIDENTIAL AND COMMERCIAL ELECTRICAL EXAMINATION– QUESTIONS AND ANSWERS |
VERIFIED AND WELL DETAILED ANSWERS | PLUS RATIONALES | DOWNLOAD AND PASS | LATEST EXAM UPDATE
2026/2027
Core Domains
National Electrical Code (NEC) Requirements and Applications
Residential Wiring Methods and Load Calculations
Commercial Electrical Systems and Design
Overcurrent Protection and Device Coordination
Grounding and Bonding Principles
Electrical Theory and Basic Mathematics
Blueprint Reading and Specifications
Safety Standards (OSHA and NFPA 70E)
Motor Controls and Branch Circuits
Testing, Troubleshooting, and Maintenance
,Introduction
This comprehensive examination is designed to assess the knowledge and practical skills required for the New Mexico
EE98 Residential and Commercial Electrical license. The test covers foundational electrical theory, in-depth
understanding of the National Electrical Code, and the application of safe wiring practices in both residential and
commercial settings. Candidates will encounter multiple-choice questions and scenario-based problems that evaluate
their ability to interpret blueprints, perform accurate load calculations, and select appropriate materials and
equipment. This rigorous assessment emphasizes real-world decision-making, ensuring that licensed electricians can
effectively manage projects, comply with regulations, and maintain the highest standards of safety and professionalism.
SECTION ONE: QUESTIONS 1 – 50
1. What is the minimum size copper equipment grounding conductor required for a 200-ampere residential
service?
A. 8 AWG
B. 6 AWG
C. 4 AWG
D. 2 AWG
,🟢 Correct Answer: C. 4 AWG
🔴 Explanation: According to NEC Table 250.66, for a 200-ampere service, the minimum size copper grounding
electrode conductor is 4 AWG. Sizing is based on the area of the largest ungrounded service conductor.
2. In a commercial building, the disconnecting means for each set of electric signs must be located within sight of
the sign and be rated at least what percentage of the sign's full-load current?
A. 100%
B. 115%
C. 125%
D. 150%
🟢 Correct Answer: C. 125%
🔴 Explanation: NEC 600.6(A) requires that each sign and outline lighting system be provided with a disconnecting
means that is within sight from the sign and is rated at least 125% of the sign's full-load current.
3. What is the maximum allowable voltage drop for a branch circuit feeder in a commercial installation?
A. 1%
B. 2%
, C. 3%
D. 5%
🟢 Correct Answer: D. 5%
🔴 Explanation: While the NEC doesn't mandate specific voltage drop limits, the generally recommended maximum
total voltage drop for branch circuits and feeders combined is 5%. Feeders should be limited to 3%, and branch
circuits to 2%.
4. A 120-volt, single-phase circuit supplies a load of 16 amperes. What is the total resistance of the circuit?
A. 7.5 ohms
B. 10 ohms
C. 12 ohms
D. 15 ohms
🟢 Correct Answer: A. 7.5 ohms
🔴 Explanation: Using Ohm's Law: R = E/I = 120V / 16A = 7.5 ohms.
5. For a dwelling unit, the minimum number of 20-ampere small-appliance branch circuits required to serve the
kitchen, pantry, and dining room is:
VERIFIED AND WELL DETAILED ANSWERS | PLUS RATIONALES | DOWNLOAD AND PASS | LATEST EXAM UPDATE
2026/2027
Core Domains
National Electrical Code (NEC) Requirements and Applications
Residential Wiring Methods and Load Calculations
Commercial Electrical Systems and Design
Overcurrent Protection and Device Coordination
Grounding and Bonding Principles
Electrical Theory and Basic Mathematics
Blueprint Reading and Specifications
Safety Standards (OSHA and NFPA 70E)
Motor Controls and Branch Circuits
Testing, Troubleshooting, and Maintenance
,Introduction
This comprehensive examination is designed to assess the knowledge and practical skills required for the New Mexico
EE98 Residential and Commercial Electrical license. The test covers foundational electrical theory, in-depth
understanding of the National Electrical Code, and the application of safe wiring practices in both residential and
commercial settings. Candidates will encounter multiple-choice questions and scenario-based problems that evaluate
their ability to interpret blueprints, perform accurate load calculations, and select appropriate materials and
equipment. This rigorous assessment emphasizes real-world decision-making, ensuring that licensed electricians can
effectively manage projects, comply with regulations, and maintain the highest standards of safety and professionalism.
SECTION ONE: QUESTIONS 1 – 50
1. What is the minimum size copper equipment grounding conductor required for a 200-ampere residential
service?
A. 8 AWG
B. 6 AWG
C. 4 AWG
D. 2 AWG
,🟢 Correct Answer: C. 4 AWG
🔴 Explanation: According to NEC Table 250.66, for a 200-ampere service, the minimum size copper grounding
electrode conductor is 4 AWG. Sizing is based on the area of the largest ungrounded service conductor.
2. In a commercial building, the disconnecting means for each set of electric signs must be located within sight of
the sign and be rated at least what percentage of the sign's full-load current?
A. 100%
B. 115%
C. 125%
D. 150%
🟢 Correct Answer: C. 125%
🔴 Explanation: NEC 600.6(A) requires that each sign and outline lighting system be provided with a disconnecting
means that is within sight from the sign and is rated at least 125% of the sign's full-load current.
3. What is the maximum allowable voltage drop for a branch circuit feeder in a commercial installation?
A. 1%
B. 2%
, C. 3%
D. 5%
🟢 Correct Answer: D. 5%
🔴 Explanation: While the NEC doesn't mandate specific voltage drop limits, the generally recommended maximum
total voltage drop for branch circuits and feeders combined is 5%. Feeders should be limited to 3%, and branch
circuits to 2%.
4. A 120-volt, single-phase circuit supplies a load of 16 amperes. What is the total resistance of the circuit?
A. 7.5 ohms
B. 10 ohms
C. 12 ohms
D. 15 ohms
🟢 Correct Answer: A. 7.5 ohms
🔴 Explanation: Using Ohm's Law: R = E/I = 120V / 16A = 7.5 ohms.
5. For a dwelling unit, the minimum number of 20-ampere small-appliance branch circuits required to serve the
kitchen, pantry, and dining room is:
