The NEC does not require a separate overcurrent protective device or disconnect when a power factor correction capacitor is connected to which point of a single motor circuit installation
Protection System
A system that protects electrical systems from faults by isolating the problematic part from the remainder of the system, preventing power from being cut from healthy elements, improving system dependability and efficiency is the protection system. Protection devices are the equipment that are utilized to implement the protection system.
Predictive Maintenance System
Predictive maintenance technologies are designed to assist in determining the state of in-service equipment so that maintenance can be scheduled. Predictive maintenance is the application of information; proactive maintenance approaches examine the condition of equipment and anticipate when it should maintain. The purpose of predictive maintenance is to forecast when equipment will fail (depending on a variety of parameters), then prevent the failure through routine and corrective maintenance.Condition monitoring is the continual monitoring of machines during process conditions to maintain optimal machine use, which is necessary for predictive maintenance. There are three types of condition monitoring: online, periodic, and remote. Finally, remote condition monitoring allows the equipment observed from a small place and data supplied for analysis.
Preventive Maintenance System
To maintain the equipment and materials on a regular basis in order to maintain those running conditions and reduce unnecessary shutdowns due to unexpected equipment failure is called Preventive Maintenance (PM).
Q11. The NEC does not require a separate overcurrent protective device or disconnect when a power factor correction capacitor is connected to which point of a single motor circuit installation.
![**Chapter 11: Power Factor**
**Page 263**
8. We are told that 1 horsepower is equivalent to 746 watts, but a 1-horsepower, 200-volt single-phase motor, according to Table 10-2 (NEC Table 430.248), has a current of 9.2 amperes. Explain this apparent discrepancy.
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
9. A 240-volt, 3-phase circuit has a current of 116 amperes. A wattmeter connected to the circuit indicates a load of 34.7 kilowatts.
a. What is the power factor? __________________________________________________
b. How many capacitive VAR would be needed to correct the power factor to 95%?
____________________________________________________________________________________
____________________________________________________________________________________
10. When a 60-volt, 60-hertz supply is connected to a capacitor, the current reads 0.6 ampere. What is the capacitance of the capacitor?
____________________________________________________________________________________
____________________________________________________________________________________
11. The NEC does not require a separate overcurrent protective device or disconnect when a power factor correction capacitor is connected to which point of a single motor circuit installation?
____________________________________________________________________________________
____________________________________________________________________________________
12. What is the NEC section for sizing conductors to a capacitor and generally what is the NEC minimum required percentage of the rated capacitor current for conductor sizing?
____________________________________________________________________________________
____________________________________________________________________________________
13. What two characteristics of a capacitor are required to be tested to determine if the capacitor is still effective?
____________________________________________________________________________________
____________________________________________________________________________________](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb5414171-c380-4777-8c23-cfdc784102c9%2F24fe4f1c-7631-4bf0-96c9-43d51b6a6e7f%2Fbysc9e_processed.jpeg&w=3840&q=75)
![](/static/compass_v2/shared-icons/check-mark.png)
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
![Introductory Circuit Analysis (13th Edition)](https://www.bartleby.com/isbn_cover_images/9780133923605/9780133923605_smallCoverImage.gif)
![Delmar's Standard Textbook Of Electricity](https://www.bartleby.com/isbn_cover_images/9781337900348/9781337900348_smallCoverImage.jpg)
![Programmable Logic Controllers](https://www.bartleby.com/isbn_cover_images/9780073373843/9780073373843_smallCoverImage.gif)
![Introductory Circuit Analysis (13th Edition)](https://www.bartleby.com/isbn_cover_images/9780133923605/9780133923605_smallCoverImage.gif)
![Delmar's Standard Textbook Of Electricity](https://www.bartleby.com/isbn_cover_images/9781337900348/9781337900348_smallCoverImage.jpg)
![Programmable Logic Controllers](https://www.bartleby.com/isbn_cover_images/9780073373843/9780073373843_smallCoverImage.gif)
![Fundamentals of Electric Circuits](https://www.bartleby.com/isbn_cover_images/9780078028229/9780078028229_smallCoverImage.gif)
![Electric Circuits. (11th Edition)](https://www.bartleby.com/isbn_cover_images/9780134746968/9780134746968_smallCoverImage.gif)
![Engineering Electromagnetics](https://www.bartleby.com/isbn_cover_images/9780078028151/9780078028151_smallCoverImage.gif)