Electrical residential

What AWG wire size is required for a small appliance circuit?

# 12

What are the minimum copper wire and circuit breaker size allowed for a laundry room branch?

# 12 - 20 amps

💡When referring to the number of wires permitted in a box, when different sizes of wire are in the box, the cubic inch rating of a #18 AWG is?

1.5 cubic inch

A ground fault circuit interrupter (GFCI) will trip in?

1/40 of a second

How fast will a GFCI trip or "open" the circuit?

1/40 of a second.

What is the demand factor for fixed electric space heating?

100%

Why would the maximum ampacity of plug fuses be if the fuses had a hexagonal window on the fuse?

15 amps or less

Plug fuses are never permitted in circuits that exceed how many volts to ground?

150 V

What is the max voltage for "PLVS" type fuses?

150 V

💡A ceiling fan cannot be supported by just an electrical box if the fan weighs more than?

35 pounds

What is the volume allowance for a # 12 wire

36.9 cm 3 / 2.25 in 3

The maximum distance between kitchen countertop receptacles is?

4 feet

A light fixture which weighs more than _________ must be supported independently from the box.

50 pounds

A 3" x 2" x 2 3/4" device box can have a maximum of?

6 #12 wires

Any receptacle installed within _______ of a kitchen sink must be GFCI protected.

6 feet

A GFCI is required in a kitchen if the outlets are within?

6 feet of a sink

Electrical wire size is expressed in?

AWG

💡The size of the service entrance conductors depends on what?

Electrical load

The neutral is always wired to the travelers first before hooking up the commons. True or False

False

A circuit that goes from the SEP to a sub panel is called a?

Feeder circuit

A circuit that goes from the SEP to a sub-panel is called a?

Feeder circuit

What is the maximum number of 14 AWG wires in a 3" x 2" x 2" device box?

Five 14 AWG wires

If two 3 way switches and three 4 way switches are being used, to control lights they are controlled from?

Five locations

Any receptacles installed in a bathroom must be?

GFCI type

Any receptacle(s) installed in a bathroom must be?

GFCI type receptacles

A GFCI monitor is the current balance between?

Grounded and ungrounded conductors

A GFCI monitors the current balance between the?

Grounded and ungrounded conductors

The wire leading from the ground bar in the SEP to the driven ground rod is called the?

Grounding electrode conductor

With a resistance of only 25 ohms the_________ protect students from shocktrocution.

Grounding system

Split bolts are used to bind?

Heavy gauge conductors

What is another name for the ungrounded conductor?

Hot/Line

💡 The ground bar in the SEP must be grounded to Earth by connecting it to a grounding electrode conductor GFC ____ ______ _____ _____.

In contact with earth.

A refrigerator in most kitchens is on an?

Individual circuit

In a switch loop arrangement the power from the service enters the ___________ box First.

Lighting fixture

💡 A GFCI will trip on a current imbalance between the?

Line and the neutral

💡The red wire on a photocell connects to the?

Load or light

When the power company installs their triplex cable, there is a bear conductor. What is this conductor called?

Messenger

A common name for non-metallic sheathed cable is?

Romex

Boring holes in the wood members and mounting the boxes is called?

Roughing in

Regular switches and receptacles can be wired by either using the back wired (push-in) or side wired (screw terminals) method. Which offers the best connection?

Side terminals

💡Regular switches and receptacles can be wired by either using pushed in or side wire screw terminals method. Which offers the best connection?

Side wired

A neutral wire from the SEP connects to what color screws on a receptacle?

Silver

The______________on an electrical outlet are used to connect the neutral to the device

Silver screws

💡On Romax cable marked 14-3 AWG, what do these numbers and letters mean?

Size of wire, number of conductors with ground

Receptacles in the dining room are connected to a?

Small appliance branch circuit.

Wire nuts can be used with?

Solid and stranded wires

Wire nuts can be used with either _________ or _________ ?

Stranded or solid wire types

Wire nuts work with solid and?

Stranded wires

Feeder circuits provide power to a?

Sub panel

💡 What are the three most common symbols found on a blueprint?

Switch, ceiling outlet, duplex receptacle

The size of the service entrance conductors depends on what?

The electrical load

💡The current capacity of a conductor depends on two things. What are they?

The size of the wire and the material it is made of.

When wiring a switch leg circuit, power enters what first?

The switch

💡How S type plug fuses different from Edison Plug fuses?

The thread sizes prevent installing the wrong amperage fuse

A meter shunt is a bonding and grounding wire around?

The water meter

How many loads can you have on a 15 amp general purpose lighting circuit according to the NEC?

There is no maximum.

💡 Why are all the receptacles in a bathroom required to be GFCI protected?

There is water everywhere in the room.

When using aluminum or copper clad aluminum instead of copper wire for a 120/240 V, 3 wire single phase dwelling unit feeder, it must be sized at?

To trade sizes larger than copper

💡A metal water pipe is the only ground necessary to ground the electrical system. True or False

True, as long as it is less than 20 ohms and 10 linear feet

A photocell type switch is used to do what?

Turn lights on automatically

On a piece of paper, drawn the most used symbols found on a wiring blueprint

Turn to page 34 in your Electrical Wiring Residential book.

If a light were to be controlled from two locations, you would use?

Two 3 way switches

Each 3 way switch have three terminals screws. What are they?

Two travelers and one comment

💡In a switch loop circuit, the white wire leading to the switch is acting as a?

Ungrounded conductor

The _________ _______ are connected to the brass or hot screw on a duplex receptacle.

Ungrounded conductors

💡All 3-way and 4-way switches shall be wired so that all switching is done in the?

Ungrounded conductors

💡On a construction site, temporary service may remain in place how long?

Until the building is ready to receive power through its own panel

A dimmer is used to do what?

Very the intensity of light

On a temporary service all Parts must be?

Weatherproof / GFCI protected

Neutral is what color in a non-metallic sheath cable?

White

The neutral wire is what color?

White

Do service entrance panels have separate grounding and neutral bus bars?

Yes, in most cases.

💡When wiring a SEP and you have a ground bar and a separate neutral bar, which wires go to which? Or does it matter?

Yes, neutral wires go to the neutral bar and ground wires go to the ground bar.

💡On a separate 120v / 20 amp laundry room circuit, what other loads are allowed?

Any receptacle located in the laundry room.

💡 A photocell is used to turn lights on and off?

Automatically.

What color is the line conductor in a 14-2 AWG, coming from the Service Entrance Panel?

Black

What color screws on a receptacle do you connect the black line wire to?

Brass

💡To use a standard duplex receptacle in a split wire circuit, you must do what to it?

Break the tab

💡Non-metallic sheathed cable type NMC can be used where?

Dry, moist, damp or corrosive locations

Dimmer switches are used to very the?

Intensity of a light

💡How does a grounding system protect people?

It will allow current to flow to ground and trip a safety device.

The common screw on a three-way switch should only be connected to the?

Line and load

When wiring GFCI into a circuit so as to protect a standard duplex receptacle, the wires leading to a standard receptacle are connected to the ____ ____ of the GFCI.

Load side

Can you screw in Edison plug fuse into a "S type" socket?

No. It is smaller.

💡The best meter for locating the common terminal on a three-way switch is the?

Ohmmeter

GFCI protects what?

People

Another name for the weather head on a mast is?

Service head

When wiring a switch loop circuit, power enters what first?

The Load

What or who determines the circuit breaker size needed to protect a circuit?

Wire size

What are the minimum copper wire and circuit breaker sizes allowed for a small appliance branch circuit?

#12 / 20 amp

What are the four main steps to wiring a three-way circuit?

1) Find the neutral and hook it to the light. 2) Find the power wire and hook it to the black (common) screws in the circuit. 3) hook a wire to the other black common screws in the circuit. 4) Connect the travelers.

How many number # 14 wires can you put in eight 4" x 1 1/2 square metal box?

10

When using aluminum wire instead of copper, a 12 AWG Copper conductor would have to be replaced with what size aluminum conductor?

10 AWG

A 3" x 2" x 2" device box has a volume of?

10 cu. in.

💡Service drops must clear the ground by not less than how many feet?

10'

You have a box that has a volume of 22.5 cu in. How many number # 14 wire is can you have in that box?

11

At least one receptacle outlet shall be installed above a show window for each __________ or major fraction there of.

12 Linear feet

The maximum distance between outlets on a living room wall is?

12 feet

Receptacles in the living room of a dwelling shall be spaced no more than _______ apart and ______ above kitchen countertops.

12 feet. 4 feet.

💡For the purpose of house wiring #14 AWG wires are rated for?

15 AMPS

Hexagonal windowed plug fuses shall not be rated higher than?

15 amps

💡Pool lights circuit are never permitted to exceed how many volts to ground?

150 V

Each small appliance circuit in a dwelling is rated at?

1500 VA

What is 65% of 240 V?

156V

The rating of cord and plug utilization equipment connected to a 20 amp branch circuit that also supplies lighting units shall not exceed?

16 Amps

A home that measures 35' x 48' would have how many square feet?

1680

A small appliance circuit is required to supply?

20 amps

💡A copper ground ring conductor shall be at least?

20 feet long #2 bare wire

The voltage between L1 and L2 in a residential service is?

240V

When using a driven rod type of grounding electrode, a second rod must be driven if the resistance from the first rod to ground is more than?

25 ohms resistance

In a 35' x 48' home, how many general purpose lighting circuits would be required?

3

The unit lighting load for a dwelling unit is expressed as?

3 VA Per square feet

A garbage disposal located in a dwelling unit shall be equipped with a cord that does not exceed?

3' in length (NEC gives 18" minimum)

💡Edison base plug fuses shall not be rated more than?

30 amps

A ground rod can be buried under ground __________ If rock bottom is reached.

30 inches

💡When driving a ground rod, and rock bottom is encountered before the rod can be driven to its full length, the rod can be laid in a trench that is at least?

30 inches deep

The NEC requires that you have a minimum of two small appliance circuits. What is the minimum load?

3000 Watts

A ceiling fan cannot be supported by the box if the fan weighs more than?

35 pounds

Any fan _______ that weighs over must be supported independently of box.

35 pounds

A lighting in appliance panelboard shall not have more than _______ overcurrent protection devices.(Breakers in the panel)

42

A ground fault circuit interrupter (GFCI) will trip on a?

5 milliamperes current imbalance

Light fixtures _____ pounds or more need special hardware when mounted to them.

50

Receptacles in the living room of a dwelling shall be spaced so that there is no more than _______ from any point along the wall to a receptacle.

6 feet

When installing wires in a box, there should be at least __________ of free wire.

6 inches

When installing wires in a box, there should be at least?

6 inches of free wire

The light fixture that weighs more than _________ should not be supported screw shell only.

6 pounds

Any receptacle installed within ______ of a kitchen sink must be GFCI protected.

6'

The SEP should not be mounted higher than?

6'7" above finish grade

The largest standard cartridge fuse rating is ?

6000 amps

💡 A # 12 AWG has a cross-sectional area of _____ circular mills.

6570. (Article chart 9 T-8 "conductor property")

A hanging pendant light fixture is not permitted within ________ vertically from the rim of a bathtub.

8 feet

A hanging pendant light fixture is not permitted within _______ vertically from the rim of a bathtub.

8'

What is the maximum service load if the service rating is 100 Amp?

83% article 310.15(B)(7)

A split receptacle is a receptacle that is controlled by?

A Switch while also remaining hot

A safety device which automatically shut off power in the event of an overload or short, and can be reset is called?

A circuit breaker.

💡What device hooks to the low terminals on a GFCI receptacle?

A receptacle to be protected by the GFCI

💡Receptacles installed in bathrooms of dwelling units are on what circuit?

A separate 20 amp GFCI circuit

💡What is the difference between a split receptacle and normal outlet?

A split receptacle can be controlled from a switch while remaining live.

💡On a pilot switch, if you want the light to stay on all the time, the line wire goes on the?

A1 screw

Which month has 28 days?

All months

The wire leading from the common terminal on the second 3 way switch to a lighting fixture is connected to the lights ______ ______ ______ .

Brass color terminal

When using type THHW conductors rated for 75c, what types of locations can this conductors be used in?

Damp and dry ( T310.104(a) )

According to the table 310-104(a) THHW wire can be used in?

Damp and dry places

💡One trade size up means the wire number goes?

Down

According to the NEC, a building under construction is considered a?

Dry location

_____________ enters a dwelling on ________ provided by the power company.

Overhead service. Service drops.

💡 Power is delivered to a dwelling on ___________ and _________ __________ ________.

Overhead. Underground service conductors.

What rooms can be on a small appliance branch circuit?

Pantry

Does the end of the run device need a separate EBJ?

No

What are the three most common devices symbols used in a residential electrical drawing?

Ceiling light outlet, receptacle, and switch

Once a wire is stripped and shaped into a hook, in what direction is it placed on the terminal screw of a wiring device?

Clockwise

💡When making wire connections on switches or receptacles, the wire should loop around the screw terminals in a?

Clockwise direction

What happens to the ampacity of stranded conductors when some strands break off is cut off?

Conductors ampacity is reduced

A porcelain lighting fixture will have one brass colored terminal and one silver colored terminal when connecting the circuit wires. You would connect this lighting fixture how?

Connect black to the brass and white to the silver

When installing a system using two hot conductors such as a multi circuit (small appliance) you would do what?

Connect each hot conductor to its own breaker.

If a switch or receptacle is marked for CU wire, the only type of wire that should be connected to it is?

Copper

💡What happens in a series circuit to voltage and current?

Current remains the same and voltage divides

The types of non-metallic sheathed cable designations are?

NM, NMS, NMC

How many outdoor receptacles, (rated at 20amps) would be on a small appliance circuit?

NONE (0)

The grounded conductor is connected to the ________ in the SEP.

Neutral bar

Under normal conditions the ______ _______ should not be switch or fused.

Neutral conductor

💡What is the rule of thumb for a neutral conductor?

Neutral is always white but the white wire isn't always neutral.

Some light fixtures are center mounted on threaded metal tube called a?

Nipple

Can a natural gas line be used as part of a grounding system?

No

💡 The NEC states that if you climb over obstacles to get to an electrical device, it is?

Not readily accessible

When using aluminum in place of copper in branch circuits, the aluminum conductors must be sized how many trade sizes larger than copper conductors?

One trade size larger.