NM ES-3 Test (New Mexico Low Voltage Journeyman) -
Questions With Correct Solutions
What is the minimum clearance to the edge of a wood stud for a wire hole?
Correct Ans - 1 1/4 inches(NEC 300.4 A 1)
What is the minimum separation between a class 1 fire alarm circuit
conductor and a class 2 or class 3 circuit? Correct Ans - 1/4 inch
A basic alarm system will have __ power sources. Correct Ans - 2
What is the minimum required clearance between a receiving antenna and
250 volt line not insulated? Correct Ans - 2 Feet
The minimum clearance for an antenna to other conductors is? Correct Ans
- 2 Feet (NEC 810.13)
How far away must communications cables be from electric, light, or power
conductors Correct Ans - 2 inches
what is the maximum blink rate on a strobe light per second? Correct Ans -
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? Correct Ans - 2 (NFPA 72 24.4.1.2.1)
What is the minimum required height for a propriety manual pull fire alarm?
Correct Ans - 3 1/2 feet or 42 inches
An overhead feeder must have a clearance of __ from chimneys, radio, and
television antennas. Correct Ans - 3 Feet (NEC 225.19 B)
The NEC classifies Continuous Load as equipment running at a maximum load
of __ ____? Correct Ans - 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? Correct Ans -
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:
Correct Ans - 6.5 feet
What is the minimum required separation between communication cables
and lighting conductors? Correct Ans - 6 feet
What is the minimum separation required between coaxial cable in a CATV
system and lighting conductors Correct Ans - 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? Correct Ans - 6 feet
What is the minimum length of a grounding rod in an application of less than
50 volts? Correct Ans - 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: Correct Ans - 10
feet
All of the following is acceptable as a ground except? Correct Ans - 10 foot
gas pipe (NEC 250.5.2 A)
An antenna is installed on a building for signal reception, what is the smallest
size copper grounding conductor that would be permitted? Correct Ans -
10 Gauge (NEC 810.21.8 H)
Electrical conduit buried 18 inches below grade shall have a warning tape at
how many inches above the conduit? Correct Ans - 12 inches (NEC 300.5
D 3)
What is the smallest ground wire to to communications box Correct Ans -
14 AWG (NEC 830.100 A 3)
What is the minimum size grounding conductor for communications circuits
Correct Ans - 14 AWG
Questions With Correct Solutions
What is the minimum clearance to the edge of a wood stud for a wire hole?
Correct Ans - 1 1/4 inches(NEC 300.4 A 1)
What is the minimum separation between a class 1 fire alarm circuit
conductor and a class 2 or class 3 circuit? Correct Ans - 1/4 inch
A basic alarm system will have __ power sources. Correct Ans - 2
What is the minimum required clearance between a receiving antenna and
250 volt line not insulated? Correct Ans - 2 Feet
The minimum clearance for an antenna to other conductors is? Correct Ans
- 2 Feet (NEC 810.13)
How far away must communications cables be from electric, light, or power
conductors Correct Ans - 2 inches
what is the maximum blink rate on a strobe light per second? Correct Ans -
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? Correct Ans - 2 (NFPA 72 24.4.1.2.1)
What is the minimum required height for a propriety manual pull fire alarm?
Correct Ans - 3 1/2 feet or 42 inches
An overhead feeder must have a clearance of __ from chimneys, radio, and
television antennas. Correct Ans - 3 Feet (NEC 225.19 B)
The NEC classifies Continuous Load as equipment running at a maximum load
of __ ____? Correct Ans - 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? Correct Ans -
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:
Correct Ans - 6.5 feet
What is the minimum required separation between communication cables
and lighting conductors? Correct Ans - 6 feet
What is the minimum separation required between coaxial cable in a CATV
system and lighting conductors Correct Ans - 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? Correct Ans - 6 feet
What is the minimum length of a grounding rod in an application of less than
50 volts? Correct Ans - 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: Correct Ans - 10
feet
All of the following is acceptable as a ground except? Correct Ans - 10 foot
gas pipe (NEC 250.5.2 A)
An antenna is installed on a building for signal reception, what is the smallest
size copper grounding conductor that would be permitted? Correct Ans -
10 Gauge (NEC 810.21.8 H)
Electrical conduit buried 18 inches below grade shall have a warning tape at
how many inches above the conduit? Correct Ans - 12 inches (NEC 300.5
D 3)
What is the smallest ground wire to to communications box Correct Ans -
14 AWG (NEC 830.100 A 3)
What is the minimum size grounding conductor for communications circuits
Correct Ans - 14 AWG
