Questions and Answers
According to NEC chapter 9, Table 8, how many strands does No. 10 AWG wiring have?
What is the ampacity of a No. 6 AWG, type UF copper cable according to NEC table 310.15(B)(16)?
55 amps
If a conductor has a low resistance, it has a high conductivity.
True
What type of insulation is likely used for telephone wiring in a plenum space?
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What is the allowable ampacity of number 14 AWG fixture wire according to NEC table 402.5?
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What is the temperature rating of a service entrance cable when the cable is not marked otherwise?
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Which of the following is the most common type of jacket used in wiring?
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What should be used instead of fish tape if a pool is expected to be difficult?
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What equipment is likely required for large conductors?
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Study Notes
Conductor Specifications
- No. 10 AWG wiring consists of 7 strands as specified in NEC Chapter 9, Table 8.
- A No. 6 AWG, type UF copper cable has an ampacity of 55 amps according to NEC Table 310.15(B)(16).
Conductivity and Insulation
- Conductors with low resistance demonstrate high conductivity.
- Telephone wiring in plenum spaces typically utilizes Teflon insulation for safety and performance.
Fixture Wire and Temperature Ratings
- The allowable ampacity of number 14 AWG fixture wire is 17 amps, as referenced in NEC Table 402.5.
- The standard temperature rating for service entrance cables, unless otherwise specified, is 75°C (167°F).
Common Materials and Techniques
- Polyethylene is the most common type of cable jacket used in electrical applications.
- For difficult pulls in pools, consider using a pull cable over fish tape to enhance efficiency.
Equipment for Large Conductors
- Large conductors often necessitate the use of electrically driven power pullers for effective installation.
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Description
Test your knowledge on conductor specifications, conductivity, and insulation with this quiz. Dive into details from NEC standards and common materials used in electrical applications. Perfect for students of electrical engineering or anyone interested in electrical wiring.
