Question 1 of 10
According to the NEC, what is a feeder?
A feeder is defined as the conductors carrying power from the service equipment to branch circuit panels or distribution equipment.
Question 2 of 10
What percentage of the feeder rating should continuous loads not exceed?
Continuous loads should not exceed 80% of the feeder's rating to prevent overheating.
Question 3 of 10
For feeder conductors, what is the impact of voltage drop?
Excessive voltage drop can lead to decreased efficiency of the electrical system.
Question 4 of 10
Where should overcurrent protection devices for feeders be located?
Overcurrent protection devices should be located at the origin of the feeder to protect the conductors.
Question 5 of 10
What NEC table is used to determine the size of the equipment grounding conductor (EGC) for a feeder?
Table 250.122 is used to size the equipment grounding conductor.
Question 6 of 10
In a subpanel, how should the grounded conductor (neutral) and the equipment grounding conductor (EGC) be treated?
The grounded conductor and EGC must be isolated in subpanels to prevent ground faults.
Question 7 of 10
What is the typical color-coding for an equipment grounding conductor (EGC)?
Green or bare conductors are typically used for equipment grounding conductors.
Question 8 of 10
What is the purpose of a main disconnecting means for each feeder?
The main disconnecting means allows for safe de-energization of the feeder for maintenance or emergencies.
Question 9 of 10
Which of the following feeder installations requires ground-fault protection?
Feeders supplying 800 A or more to 3-phase, 4-wire systems must include ground-fault protection.
Question 10 of 10
When sizing conductors, which NEC table is primarily used for ampacity?
Table 310.16 provides ampacity ratings for various conductor types and sizes.
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