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Flashcards in Ch 3 Deck (41)
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1

In a parallel circuit, the total power is equal to what?

The sum of the branches' powers

2

What can happen if the neutral conductor of a multi-wire circuit is interrupted (opened)? Why?

Fire or destruction of equipment, because it can cause overvoltage or undervoltage of the electrical equipment.

3

The current flowing in the neutral conductor of a multi-wire circuit is called:

Unbalanced Current

4

The neutral conductor of a 3-wire, 120/208V or 277/480V circuit from a 4-wire, three phase system will ______ carry neutral current

Always

5

In a parallel circuit, the resistance total is _____ than the smallest individual resistance

Less

6

This type of circuit is also called "Open-loop system"

Parallel

7

What is the formula for the Product-Over-Sum Method?

Rt = (R1 x R2) / (R1 + R2)

8

This conductor is also called a "grounded conductor"

Neutral

9

In a series circuit, what does the sum of the power consumed by all the resistors equal?

The total power consumed by the circuit

10

(Series or Parallel) Total power is equal to the sum of the branches' powers

Parallel

11

The _______ conductor or a solidly grounded system is required to be grounded.

Neutral

12

(Series or Parallel) Total resistance is less than the smallest individual resistance

Parallel

13

Term for "connected to the Earth"

Grounded

14

Because of the dangers of an open neutral conductor, what does the NEC require in a multi-wire circuit?

That the neutral be spliced and brought out to the device. This way if the device is removed, it does not result in an open neutral conductor.

15

Circuit consisting of two or more ungrounded conductors that have a voltage between them, and an equal voltage between each ungrounded conductor

Multi-wire Circuit

16

Current is identical through all circuit elements in this type of circuit

Series

17

In a 3-wire 120/240V, single-phase circuit, the current flowing on the neutral will be what?

The difference between the current on the ungrounded conductors

18

When power supplies are connected in series, the voltage of the power supply will be ________

Additive

19

(Series or Parallel) The sum of the currents through each path is equal to the total current that flows from the source

Parallel

20

In a parallel circuit, voltage is ____ across each component of the parallel circuit?

The same

21

In a parallel circuit, the sum of the currents through each path is equal to what?

The total current that flows from the power source

22

In a multi-wire branch circuit, what could cause the neutral to become overloaded with current and damage the insulation?

Not terminating the ungrounded conductors to separate phases

23

(Series or Parallel) Current is constant

Series

24

(Series or Parallel) Total resistance of a series circuit is equal to the sum of all of the resistances of the circuit

Series

25

What is the formula for the Reciprocal Mehtod?

Rt = 1 /(1 /R1, + 1/R2, + 1/R3......)

26

If the circuit is balanced and the current flow on each line of the circuit is the same, how much current will the neutral conductor carry?

0 Amps

27

(Series or Parallel) Has two or more paths for current to flow through

Parallel

28

In a 2-wire circuit, the _____ flowing on the neutral will be the same as the ______ on the ungrounded conductors.

Current, Current

29

This type of circuit is also called a "closed-loop system"

Series

30

In a series circuit, what does the sum of the voltages equal?

Voltage of the power source