Questions and Answers
Flexible cords and cables shall be installed in continuous lengths without splices or taps.
True
The 'J' designation in any of the 'S-type' flexible cords designates ___.
a junior size
An electric-discharge luminaire utilizes a ___ for the operation of the lamp.
ballast
___ is a type of lamp used in an HID luminaire.
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The NEC® prohibits mounting luminaires directly to a tree.
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___ shall not support luminaires weighing over 6 lb.
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Any branch circuit conductor located within ___" of a ballast shall have an insulation rating not lower than 90ºC.
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___-grade receptacles are the highest grade receptacles manufactured by the electrical industry.
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After removing the receptacle from its package, if the leads of the ohmmeter are placed between Points D and G, the meter should indicate ___ ohms.
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Within sight is visible and no more than ___ feet from the object.
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The maximum length of a flexible cord used to connect data-processing equipment to a branch circuit outlet box is ___.
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The damaged power cord on a 120-volt appliance can be replaced with a 6-ft length of flexible SJO cord not smaller than ___ AWG.
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A listed appliance with a 16 AWG flexible power cord is considered to be protected by a 15-amp branch circuit breaker.
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The 'W' suffix in any of the 'S-type' flexible cords designates that the cable ___.
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Which of the flexible cords or cables listed below can be used in dry locations?
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Which of the flexible cables or cords listed below could be used to connect a piece of equipment that operates at 480 volts 3-ph?
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When connected to a 1Ø piece of equipment that operates at 240 volts, a 12 AWG SJO flexible cord can carry ___ amps.
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The ampacity of each conductor of a 16/3 AWG multiconductor Type SPT-2 flexible cord is ___ amps.
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The smallest AWG size cord to connect equipment requiring 2 ungrounded and 1 grounded conductors is ___.
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When connected to a 120/240-volt, 3Ø piece of equipment, a 10 AWG SJO flexible cord can carry ___ amps.
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A 3Ø piece of equipment with a nameplate rating of 54 amps at 240 volts requires the smallest cord of ___ AWG.
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For a 208-volt, 1-ph piece of equipment, the smallest AWG size cord that can be used is ___.
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Where 6 AWG/7-conductor Type G flexible cable is used, it has an ampacity of ___ amps.
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Study Notes
Flexible Cords and Cables
- Flexible cords and cables should be installed in unbroken lengths without splices or taps.
- "J" designation in "S-type" flexible cords indicates a junior size.
Electric-Discharge Luminaires
- Utilization of a ballast is essential for the operation of electric-discharge luminaires.
- HID luminaires can use mercury-vapor and metal halide lamps.
Mounting and Support Regulations
- Luminaires can be mounted directly to a tree, contrary to prohibition.
- Lampholders must not support luminaires weighing more than 6 pounds.
Insulation Ratings
- Branch circuit conductors within 3 inches of a ballast require an insulation rating of at least 90ºC.
Receptacles
- Hospital-grade receptacles are the industry's highest quality.
- An infinite resistance reading between Points D and G indicates proper receptacle functionality.
Visibility and Distance
- "Within sight" means a maximum distance of 50 feet from the object.
Cord Length for Equipment
- The maximum length of flexible cord connecting data-processing equipment to an outlet is 4.5 meters.
- A damaged power cord for a 120-volt appliance may be replaced with a 6-foot length of 14 AWG SJO cord on a 15-A branch circuit.
Appliance Protection
- A listed appliance rated for a maximum 15 A with a 16 AWG flexible power cord is protected by a 15-amp branch circuit breaker.
- The "W" suffix in "S-type" cords signifies suitability for wet locations.
Cord and Cable Usage
- Any listed flexible cords or cables can be utilized in dry locations.
- SEO flexible cables are appropriate for connecting equipment operating at 480 volts 3-phase.
Ampacity of Flexible Cords
- A 12 AWG SJO flexible cord connected to 240 volts can carry 25 amps.
- A 16/3 AWG Type SPT-2 flexible cord has an ampacity of 13 amps for fastened-in-place utilization equipment.
Minimum AWG Sizes
- For equipment needing 2 ungrounded and 1 grounded conductor with a 31 amp max load, the smallest AWG size for an SOO flexible cord is 7.
- In a 120/240-volt, 3-phase setup, a 10 AWG SJO flexible cord can carry 20 amps.
- The smallest AWG cord for a 3-phase equipment rated 54 amps at 240 volts is 4.
- For a 208-volt, 1-phase equipment needing SOO flexible cord, the minimum AWG size is 14.
Ampacity Standards
- A 6 AWG/7-conductor Type G flexible cable for fastened-in-place utilization equipment has an ampacity of 62 amps.
- The installation of a fan from a non-listed 4/0 box must consider specific support methods using a threaded rod for stability.
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Description
Test your knowledge with these flashcards covering key concepts from Chapters 211 and 212 in the electrical industry. Each card focuses on essential definitions and terminologies related to flexible cords, luminaires, and more. Perfect for students and professionals looking to reinforce their understanding of electrical standards.
