Code, Standards, and Practices 2, Level I-2020 Lesson 2: Branch Circuits I

A branch circuit is defined as " The circuit conductors between the final overcurrent device protecting the circuit and the outlet(s)

True

A feeder is defined in the NEC as " All circuit conductors between the service equipment, the source of a separately derived system, or other power supply source and the final branch circuit overcurrent device"

True

The Code classification or rating of a branch circuit is generally made according to the ? .

maximum rating or setting of the branch-circuit overcurrent protection device 210.18

The basic rule(s) for connecting utilization equipment to multiwire branch circuits generally permits ? .

only line-to-neutral loads 210.4(C)

What is the maximum load, in amperes, permitted to be cord-and-plug-connected to a 20-ampere multi-outlet branch circuit?

16A 210.23(A)(1)

In general, all 120-volt, single-phase, 15- and 20-ampere branch circuits supplying outlets or devices installed in dwelling unit kitchens, family rooms, dining rooms, living rooms, parlors, libraries, dens, bedrooms, sunrooms, recreation rooms, closets, hallways, laundry areas, or similar rooms or areas shall be protected by any of the means described in NEC ? .

210.12(A)(1) through (6) ref. 210.12(A)

A branch circuit that supplies four lighting outlets and eight receptacle outlets would be classified as a(n)

General purpose branch circuit

Which of the following statements is/are true when applied to an appliance

No lighting is connected to an appliance branch circuit unless it is part of the appliance

An outdoor receptacle in a dwelling unit is located eight feet above finished grade. The receptacle is installed for general use and convenience. The receptacle is not provided with GFCI protection

Violation

A two-family dwelling contains a single branch circuit that supplies a lighting circuit for common areas and outside lighting. The branch circuit originates from a panelboard located in dwelling unit No. 1.

Violation 210.25(B)

A duplex receptacle supplies power to a cord-and-plug-connected sump pump. The sump pump is located in a readily accessible location in an unfinished basement of a one-family dwelling. The receptacle is not provided with GFCI protection.

Violation 210.8(A)(5)

With two exceptions, each branch-circuit disconnect rated 1,000 amperes or more and installed on solidly grounded wye electrical systems of more than 150 volts to ground, but not exceeding 600 volts phase-to-phase, shall be provided with ? in accordance with the provisions of Section 230.95.

. ground-fault protection of equipment 210.13

The permissible load, in amperes, for an appliance fastened in place and connected to a 20-ampere branch circuit that also feeds lighting outlets and cord-and-plug-connected equipment is ?

10A 210.23(A)(2)

The branch-circuit voltage for luminaires in a dwelling unit is limited to ? nominal between conductors

120V 210.6(A)

Which NEC reference covers the means of identifying grounded conductors?

200.6

A continuous load is where the maximum current is expected to continue for ? Or more

3 hours

The branch-circuit conductors for a household electric range rated in excess of 8 3/4 kilowatts shall generally have a rating of not less than ? .

40A 210.19(A)(3)

Which of the following 125-volt, single-phase, 15- and 20-ampere receptacles are not required to be GFCI-protected when installed in dwelling units?

A basement receptacle supplying only permanently installed fire alarm equipment 210.8(A)(5) Exception to (5)

Which of the following would be classified as an individual branch circuit

A branch circuit consisting of one single receptacle for one appliance

A multi wire branch circuit is defined in the NEC as" A branch circuit that consists of two or more grounded conductors that have a voltage between them, and an ungrounded conductor that has equal voltage between it and each grounded conductor of the circuit and that is connected to the neutral or grounded conductor of the system"

False

All receptacles serving kitchen countertops in dwelling units, regardless of the distance from a sink, must have GFCI protection.

False 210.8(A)(6)

Which of the following commercial locations generally do not require GFCI protection for 125-volt, single-phase, 15- and 20-ampere receptacles?

Finished portions or areas of the basement 210.8(B)

Receptacles rated 15 amperes are permitted to be installed on both 15- and 20-ampere branch circuits.

True 210.21(B)(2), Table 210.21(B)(2), 210.21(B)(3), Table 210.21(B)(3), 210.24, and Table 210.24.

The maximum rating of a cord-and-plug-connected appliance to a 30-ampere branch circuit with more than one outlet is 24 amperes.

True 210.23(A)(1)

Each multiwire branch circuit shall be provided with a means which will simultaneously disconnect all ungrounded conductors at the point where the branch circuit originates.

True 210.4(B)

GFCI protection must be provided for outlets that supply dishwashers installed in dwelling unit locations.

True 210.8(D)

All 120-volt, single-phase, 15- and 20-ampere branch circuits supplying outlets installed in dormitory unit bedrooms, ? , and similar rooms shall be protected by a listed arc-fault circuit interrupter meeting the requirements of NEC 210.12(A)(1) through (6) as appropriate.

all the above 210.12(B)

A duplex receptacle is a single receptacle, by definition

false 100

The grounded conductor (neutral) of a branch circuit is most commonly identified by the color ? .

white

Because of a long circuit length, a branch circuit supplying parking lot lighting is installed using 10 AWG THW copper conductors. The conductors terminate on a 20-ampere circuit breaker. The rating of this branch circuit is ? .

20AMP 210.18

When a 277/480-volt, 4-wire system and a 120/240-volt, 3-wire system are installed in the same building, the ungrounded conductors for a branch circuit shall be identified by phase or line and system at all termination, connection, and splice points.

True 210.5(C)(1)

The conductors supplying household ranges and cooking appliances such as an electric wall-mounted oven, tapped from a 50-ampere branch circuit not more than 600 volts, shall have an ampacity of not less than ? and shall be sufficient for the load served.

20A 210.19(A)(3) Exception No. 1

An outlet(s) installed for the purpose of charging electric vehicles shall be supplied by an individual branch circuit. Each circuit shall have ?

no other outlets 625.40