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1. |
411.4 Specific Location Requirements for low voltage lighting conductors
Ceilings and floors have been added.
Installation of conductors concealed or extended through a wall, floor, or ceiling shall be in accordance with (1) or (2):
(1) Installed using any of the wiring methods specified in Chapter 3
(2) Installed using supplied listed Class 2 power source and installed in accordance with 725.130.
Question: Low voltage lighting conductors cover in Article 411 can be installed through walls, ceilings, and floors if
a listed ____________ is used to supply the circuit.
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a)
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Class 2 power source
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b)
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Class 3 power source
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c)
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Class 1 power source
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2. |
422.51 New sentence added to define vending machines
The new definition of Vending Machines in 422.51 expands the meaning to include some rather unusual machines. For instance the amusement rides for children in shopping malls, massage chairs in malls, gaming machines in theatres, and the gambling machines found in bars and in Los Vegas are now vending machines.
The new sentence reads: The term vending machine means any self- service device that dispenses products or merchandise without the necessity of replenishing the device between each vending operation and is designed to require insertion of a coin, paper currency, token, card, key, or receipt of payment by other means.
The IAEI Analysis of Change Book describes children's amusement rides at malls as an example. Evidently, the product dispensed is the ride. The rule does require that only cord and plug connected vending machines require GFCI protection.
The rule also is retroactive for older vending machines manufactured prior to January 1, 2005. These existing machines will have to be GFCI protected if the 2008 NEC is adopted.
Question: Children's Amusement rides and gambling machines are now classified as ___________ and are required to be GFCI protected.
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a)
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coin operated refrigerators
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b)
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vending machines
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c)
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coin operated entertainment machines
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3. |
422.52 Electric Drinking Fountains
Electric drinking fountains shall be protected with ground-fault circuit-interrupter protection.
This is a new requirement.
Question: Electric drinking fountains shall be protected with _____________________.
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a)
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equipment ground fault protection (Class B)
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b)
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arc fault circuit interrupter protection
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c)
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ground-fault ciruit-interrupter protection
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4. |
424.19 Disconnecting Means for Fixed Electric Space-Heating Equipment
The disconnecting means shall have an ampere rating not less than 125 percent of the total load of the motors and the heaters.
Question: The disconnecting means shall have an ampere rating not less than ___________of the total load of the motors and the heaters.
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a)
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125 percent
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b)
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80 percent
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c)
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150 percent
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5. |
424.19 Disconnecting Means for Fixed Electric Space-Heating Equipment
The provisions for locking or adding a lock to the disconnecting means shall be installed on or at the switch or circuit breaker used as the disconnecting means and shall remain in place with or without the lock installed.
Question: The provisions for locking or adding a lock to the disconnecting means shall be installed on or at the switch or circuit breaker used as the disconnecting means and ________________with or without the lock installed.
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a)
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shall remain in place
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b)
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can be temporary
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c)
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can be other than permanent
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6. |
430.2 Valve Actuator Motor (VAM) Assemblies
A manufactured assemble, used to operate a valve, consisting of an actuator motor and other components such as controllers, torque switches, limit switches, and overload protection.
Question: A Valve Actuator Motor (VAM) Assembly includes __________________________________ .
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a)
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actuator motor
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b)
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controllers, torque switches
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c)
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limit switches
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d)
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overload protection
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e)
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a, b, c, and d if included
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7. |
430.103 A new sentence has been added to this section for the operation of the disconnecting means for motors.
The new sentence reads: The disconnecting means shall be designed so that it cannot close automatically.
Some installations with timers that control motors have had a problem closing automatically and now that is not permitted.
Question: The disconnecting means for motors shall be designed so that it cannot close ______________ .
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a)
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manually
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b)
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automatically
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8. |
430.126 Adjustable speed drives are required to protect motors from overtemperature conditions where the motor is not rated to operate at the nameplate rated current over the speed range required by the application.
Question: Adjustable speed drives are required to ______________ conditions where the motor is not rated to operate at the nameplate rated current over the speed range required by the application.
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a)
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protect motors from overtemperature
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b)
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protect motors from overspeed
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c)
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protect motors from over current
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9. |
430.243 Portable Motors
The frames of portable motors that operate over 150 volts to ground shall be guarded or grounded.
Exception No. 1 Listed motor operated tools, appliances, and equipment shall not be required to be grounded where protected by a system of double insulation or equivalent. this equipment shall be marked.
Exception No. 2 Listed motor operated tools, appliances, and equipment connected by a cord and plug other than those required to be grounded by 250.114.
250.114 covers grounding of cord and plug connected equipment.
Question: In general the frames of portable motors that operate over __________ to ground shall be guarded or grounded.
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a)
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50 volts
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b)
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150 volts
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c)
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100 volts
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10. |
480.5 A disconnecting means shall be provided for all ungrounded conductors derived from a stationary battery system over 30 volts. A disconnecting means shall be readily accessible and located within sight of the battery system.
Question: A readily accessible disconnecting means located within sight of the battery system shall be provided for all ungrounded conductors derived from a stationary battery system over ___________ volts.
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a)
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300
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b)
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150
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c)
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30
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