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Residential Electricity QQs and Notes Flashcards

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8888640033QQ. The silver screws on an electrical outlet are used to connect the ___________ to the device.NEUTRAL WIRE0
8888654050QQ. The neutral wire is what color?WHITE1
8888658744QQ. The voltage between L1 & L2 in a residential service is _________240 VOLTS2
8888665756QQ. Once a wire is stripped & shaped into a hook, in what direction is it placed on the terminal screw of a wiring device?CLOCKWISE3
8888674296QQ. A common name for non-metallic sheathed cable isROMEX4
8888678345QQ. What are the 3 most common device symbols used in a residential electrical drawling?1. RECEPTACLE 2. CEILING OUTLET 3. SWITCH5
8888688158QQ. A neutral wire from the SEP (Service Entry Panel) connects to what color screw on a receptacle?SILVER6
8888693177QQ. What color is the line conductor in a 14-2 WG coming from the SEP?BLACK7
8888696490QQ. Neutral is what color in non-metallic sheath cable?WHITE8
8888701746QQ. What happens to voltage & current in a series circuit?VOLTAGE DECREASES WHILE CURRENT REMAINS THE SAME9
8888706061QQ. What color screws on a receptacle do you connect the black live wire to?BRASS10
8888709418QQ. What is another name for the ungrounded conductor?HOT LINE11
8888752730QQ. Wire nuts work with solid & _________ wiresSTRANDED12
8888759204QQ. What is the difference between a split receptacle and a normal outlet?SPLIT RECEPTACLE YOU PULL THE TAB OFF13
8888810364QQ. What would the maximum ampacity of plug fuses be if the fuses had a hexagonal (six-sided shape) window on the fuse?15 AMPS OR LESS14
8888815730QQ. On Romex cable marked 14/3 WG, what do these numbers & letters mean?14 (SIZE OF WIRE) 3 (# OF CONDUCTORS) WG (WITH GROUND)15
8888898626QQ. What are the three most common symbols found on a blue print?SWITCH, CEILING OUTLETS, & DUPLEX RECEPTACLE16
8888903020QQ. When using Aluminum wire instead of copper, a #12 AWG copper conductor would have to be replaced with what size Aluminum conductor?#10 AWG17
8888906800QQ. What is the maximum number of #14 AWG wire in a 3'x2'x2' device box?5 Reference: NEC 314.16 (A)18
8940651536QQ. Electric wire size is expressed in what?GAUGES19
8940659478QQ. What is the rule of thumb for a neutral conductor?WHITE IS ALWAYS NEUTRAL, NEUTRAL ISN'T ALWAYS WHITE20
8940673829QQ. What or who, determines the circuit breaker size needed to protect a circuit?WIRE SIZE21
8940699646QQ. The current capacity of a conductor depends on two things. What are they? a) What number is on the wire & how long it is b) The load calculation & circuit breaker c) The wire size & material it's made ofc) The wire size & material it's made of22
8940717655QQ. When using aluminum conductors in place of copper conductors, the aluminum conductors must be sized how many trade sizes larger that copper conductors?One for branch circuits & Two for feeders23
8940730849QQ. A safety device which automatically shuts off power in the event of an overload or short, and can be reset is called a what?Circuit Breaker24
8940763248QQ. A home that measures 35'x48' would have how many square feet?168025
8940777062QQ. In a home that is 1680 square feet, how many general purpose lighting circuits would be required?326
8940787856QQ. A small appliance circuit is required to supply how many amps?20 amps27
8940796081QQ. What AWG wire size is required for a small appliance circuit?1228
8940808303QQ. A GFCI is required in a kitchen if the outlet is within how many feet of a sink?629
8940817118QQ. The maximum distance between outlets on a living room wall is how many feet?1230
8940840296QQ. A GFCI will trip on a ___ ___ ____ imbalance between the ____ _____ and the ______ _______.5 milliamp Hot line neutral line31
8940869837QQ. How fast will a GFCI trip or "open" the circuit?1/40th of a second32
8940887721QQ. A 3'x2'x2 3/4' device box can have a maximum of how many #12 wires?633
8940899801QQ. What is 65% of 240 Volts?156 Volts (240 x .65 = 156)34
8940931150QQ. When wiring a switch LOOP circuit, power enters what first?The load junction box (or light)35
8940950518QQ. The NEC requires that you have a minimum of 2 small appliance circuits, what is the minimum load?300036
8940964452QQ. What are the minimum copper wire & circuit breaker sizes allowed for a laundry room branch?12 Gauge @ 20 amps37
8940988208QQ. On a seperate 120V/20 amp laundry room circuit what other loads are allowed? a) Ceiling light b) Dryer c) Any receptacle in the Laundry Room d) Nothingc) Any receptacle in the Laundry Room38
8940998454QQ. How many loads can you have on a 15 amp general purpose lighting circuit according to the NEC?No maximum39
8941005755QQ. What is a meter shunt?A bonding ground wire around the water meter40
8941025880QQ. When the power company installs their triplex cable there is a bare conductor, what is this conductor called?The messenger wire41
8941035236QQ. Some light fixtures are center mounted on threaded metal tube called a what?Nipple42
8941041566QQ. The size of the service entrance conductors depends on what?The Electrical load43
8956489953QQ. When wiring a switch LEG circuit, power enters what first?The switch44
8956499971QQ. The neutral is always wired to the travelers first before hooking up the commons. True or False?False45
8956512093QQ. What are the minimum copper wire & circuit breaker sizes allowed for a small appliance branch circuit?12 Gauge wire @ 20 amps46
8956526961QQ. What rooms can be on a small appliance branch circuit? a) Crawl Space b) Pantry c) Den d) None of the aboveb) Pantry47
8956537722QQ. What device hooks to the load terminals on a GFCI receptacle?A receptacle to be GFCI protected48
8956545948QQ. Can a natural gas line be used as part of a grounding system?No, but it must be bonded49
8956555780QQ. What is the maximum service load if the service rating is 100 amps?83 amps. 100 amps x 83% (or .83) = 83 amps50
8956578540QQ. Light fixtures weighing ________ lbs or more need special hardware when mounting them.50 lbs *35 lbs for ceiling fans*51
8980360513QQ. On a temporary service, all parts must be what?GFCI protected & weatherproof52
8980380637QQ. Do service entrance panels have separate grounding & neutral bus bars?Yes, in most cases53
8980391224QQ. The SEP should not be mounted higher than __________ above finished grade.6' 7"54
8980403206QQ. On a construction site, temporary service may remain in place for how long?Until the building is ready to receive power through it's own panel55
8980413549QQ. What is the demand factor for fixed electric space heating? a) 75% b) 100% c) 125% d) 50%b) 100%56
8980422821QQ. How does a grounding system protect people?Allows current to flow to ground & trip safety devices57
8980431446QQ. Does the "End of the run" device need a separate EBJ?No, just use the ground on the 14/2 WG58
8980447279QQ. True or False. A metal water pipe is the only ground necessary to ground the electrical system.True, as long as 10 linear feet as a conductor & brings the resistance below 25 ohms59
8980457193QQ. A GFCI monitors the current imbalance between what?Line & Neutral60
8980463344QQ. How are "S" type plug fuses different from Edison Plug fuses?The thread sizes prevents installing the wrong amp fuse61
8980475118QQ. The red wire on a photo cell connects to the what?Load62
8980480470QQ. A photo cell is used to turn lights on & off how?Automatically63
8980497437QQ. A light fixture that weighs more than ______ lbs shall not be supported screw shell only. (314.27 (A) (1) Exception)664
8980504866QQ. On a pilot light switch, if you want the light to stay on all the time, the line wire goes to the _______ screw.A165
8980524064QQ. Any _______ that weighs over ______, must be supported independently of box. a) Fan, 35lbs b) Light Fixture, 45lbs c) Shaded Fixture, 5lbs d) Paddle Fan, 25lbsa) Fan, 35lbs66
8980532557QQ. With resistance of only 25 ohms, the ___________ system protects students from shocktracustion.Grounding67
8980537163QQ. The common screw on a 3-way switch should only be connected to what?The hot line / load68
8980545466QQ. A split receptacle is what?A Duplex Receptacle with hot tie bar cut69
8980552272QQ. A GFCI monitors the current imbalance between what?Line & Neutral70
8980561050QQ. A refrigerator in most kitchens is on a __________ circuit.Individual71
9027078372QQ. A #12 AWG has a cross section area of ________ circular mills. CH. 9 T-8 (Conductor Properties)653072
9027097747QQ. When using type THHW conductors rated for 75 C, what types of locations can this conductor be used in? a) Dry locations only b) Wet & Dry locations c) Wet locations only d) None of the aboveb) Wet & Dry locations73
9027105734QQ. The best meter for location the common terminal on a 3 way switch is what?An Ohm meter74
9027125662QQ. A garbage disposal located in a dwelling unit shall be equipped with a cord that does not exceed _____ inches in length? NEC gives 18' minimum.3675
9027135167QQ. To use a standard duplex receptacle in a split-wired circuit you must do what to it?Break the hot tie bar76
9027142768QQ. Service drops must clear the ground by not less than how many feet?1077
9027153894QQ. The NEC states that if you climb over obstacles to get to an electrical device, it is not ________ accessible.readily78
9027173347QQ. A lighting & appliance panel board shall not have more than ______ over current protection devices (breakers) in the panel.4279
9027194450QQ. In a switch loop arrangement, the power from the source enters?Light or Load80
9027202807QQ. Receptacles in the dinning room are connected to what type of circuit?Small Appliance Branch Circuit81
9027218012QQ. If two 3-way switches & three 4-way switches are being used to control lights, they are controlled from how many locations?582
9027222805QQ. Dimmer switches are used to vary what?Intensity83
9027237628QQ. The rating of cord & plug utilization equipment connected to a 20 Amp branch circuit that also supplies lighting units shall not exceed how many amps? T210.21(B)21684
9027246543QQ. A photocell type switch is used to do what?Turn on automatically85
9027264777QQ. 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 what?1.5 cubic inchs86
9027270882QQ. The unit lighting load for a dwelling is expressed as what?3 VA per square foot87
9027286315QQ. What happens to the ampacity of stranded conductors when some strands break off or are cut off?It's reduced88
9027293910QQ. The type of non-metallic sheathed cable designations are what?NM, NMC, & NMS89
9027307148QQ. According to Table 310.104(A), THHN wire can be used in what locations?Wet & Dry90
9108822668QQ. Any receptacle installed in a ___________ must be GFCI type.Bathroom Kitchen Garage91
9108834094QQ. Wire nuts can be used with what type of wire?Solid & Stranded92
9108844689QQ. When installing wires in a box, there should be at least ____ inches of free wire.693
9108861561QQ. Regular switches & receptacles can be wired by either using the back-wire (push-in) or side wired (screw terminals) method. Which offers the best connection?Side wired94
9108872597QQ. Any receptacle installed within ____ feet from a kitchen sink must be GFCI protected.695
9108905871QQ. If a light were to be controlled from two locations, you would use what?2 3-way switches96
9108896007QQ. A hanging pendant light fixture is not permitted within ____ feet vertically from the rim of a bathtub.897
9108917704QQ. A ceiling fan cannot be supported by the box if the fan weighs more than _____ pounds.3598
9108932487QQ. ___________ service enters the dwelling on _________ ________ provided by the power company.Overhead Service drops99
9108943233QQ. A circuit that goes from the SEP to a sub-panel is called a what?Feeder100
9108952980QQ. Power is delivered to a dwelling on __________ & ________ service conductors.Overhead Underground101
9108967110QQ. When making wire connections on switches or receptacles, the wire should loop around the screw terminals in a ___________ direction.Clockwise102
9108980727QQ. At least one receptacle outlet shall be installed above a show window for each ________ linear feet or major fraction thereof.12103
9108988228QQ. Under normal conditions, the neutral conductor should not be __________ or __________.Switched Fused104
9109004031When 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 ________ ohms of resistance.25105
9109018922QQ. The wire leading from the common terminal on the second 3-way switch to a lighting fixture is connected to the _______ screw.brass106
9109092619QQ. A light fixture which weighs more than _______ pounds must be supported independently from the box.50107
9109109029QQ. A porcelain lighting fixture will have one brass colored terminal & one silver colored terminal. When connecting the circuit wires, connect the _______ to brass & _________ to silver.Line Neutral108
9109121592QQ. If a switch or receptacle is marked for CU wire the only type of wire that should be connected to it is what?Copper109
9109131097QQ. The ground bar in the SEP must be grounded to earth by connecting it to the __________ ___________ ___________Grounding electrode conductor110
9109143295QQ. For the purpose of house wiring, #14 AWG wires are rated for _____ amps.15111
9109149478QQ. Feeder circuits provide power to a ________ ________.Sub panel112
9109159491QQ. The largest standard cartridge fuse rating is _____ amps.6000113
9109181647QQ. When wiring GFCI into a circuit so as to protect a standard duplex receptacle, the wires leading to a standard receptacle are connected to what?Load of GFCI114
9109199276QQ. When wiring an SEP and you have a ground bar and a separate neutral bar, which wires go to which or does it matter?Neutral wires to neutral, ground wires to ground.115
9109218575QQ. How many outdoor receptacles, rated at 20 amps, would be on a small appliance circuit?0116
9109234730QQ. All 3-way & 4-way switches shall be wired so that all switching is done on the ______________ conductors.Ungrounded117
9109241462QQ. Boring holes in the wood members & mounting the boxes is called what?Roughing In118
9109251756QQ. Each small appliance circuit in a dwelling is rated at __________ VA.1500119
9109265807QQ. A dimmer is used to do what?Vary intensity120
9109289108QQ. A GFCI will trip on a what?5 miliamp current imbalance121
9109307127QQ. A copper ground ring conductor shall be at least what gauge?#2 bare122
9109313329QQ. Edison base plug fuses shall not be rated more than ____ amps.30123
9109335188QQ. When using aluminum or copper-clad aluminum instead of copper wire for a 120/240V, 3 wire single-phase dwelling unit feeder, it must be sized at how many sizes larger or smaller?2 sizes larger124
9109345506QQ. Can you screw an Edison plug fuse into a "S type" socket?No125
9109353422QQ. Plug fuses are never permitted in circuits that exceed how many volts to ground?150126
9109374997QQ. Receptacles in the living room of a dwelling shall be spaced so that there is no more than _____ feet from any point along the wall to a receptacle.6127
9109384065QQ. According to the NEC a building under construction is considered a __________ location.Dry128
9109401620QQ. When driving a ground rod, & rock bottom is encountered before the rod can be driven to it's full length, the rod can be laid in a trench that is at least ___________ feet deep.2 1/2129
9109412335QQ. A GFCI will trip in what amount of time?1/40th of a second130
9109421137QQ. A ground rod can be buried _________ feet under ground if rock bottom is reached2 1/2131
9109429769QQ. Hexagonal windowed plug fuses shall not be rated higher than _____ amps.15132
9109438932QQ. When going one trade size up, the wire size number goes __________Down133
9109451929QQ. Split bolts are used to bind ______ ______ _______.Heavy gauge wire134
9109458210QQ. Pool light circuits are never permitted to exceed how many volts to ground?150135
9109472915QQ. Receptacles in the living room of a dwelling shall be spaced no more than ________ feet apart, and ________ feet above kitchen counter tops.12 4136
9109482734QQ. In a switch loop circuit the white wire leading to the switch is acting as a _____ ______.White hot137
9109491548QQ. The bare copper wire or ________ colored wire is the grounding conductor.Green138
9138000782QQ. When installing a system using two hot conductors such as a multi-circuit (small appliance), you would do what?Each hot conductor on it's own circuit breaker139
9138021073QQ. The maximum distance between kitchen counter top receptacles is how many feet?4140
9138028804QQ. Each 3-way switch has 3 terminal screws. What are they?1 Common 2 Travellers141
9138037279QQ. Non-metallic sheathed cable type NMC can be used where?Dry, Moist, Damp, & Corrosive locations142
9138046638QQ. The wire leading from the ground bar in the SEP to the driven ground rod is called the what?Grounding Electrode Conductor143
9138052155QQ. What is the max voltage for plug type fuses?150V144
9138057664QQ. Another name for the weather head on a mast is called what?Service Cap145
9138065330QQ. A GFCI protects what?People146
9138072673QQ. Why are the receptacles in a bathroom required to be GFCI protected?Near water147
9138079260QQ. Wire nuts can be used with _________ & __________ wire typesSolid Stranded148
9138098667QQ. When installing wires in a box, there should be at least _______ inches of free wire.6149
9138105634QQ. Regular switches & receptacles can be wired by either using the push in or side wired method. Which offers the best connection?Side wired150
9138111268QQ. Any receptacle installed within _______ fee of a kitchen sink must be GFCI protected.6151
9138116326QQ. If a light were to controlled from two locations, you would use what?2 3-way switches152
9138126300QQ. A hanging pendant light fixture is not permitted within _______ feet vertically from the rim of a bath tub.8153
9138133373QQ. A ceiling fan cannot be supported by just an electrical box if the fan weighs more than how many pounds?35154
9138137051QQ. The ungrounded conductor is connected to the _______ colored screw on a duplex receptacle.Brass155
9138149392QQ. Receptacles installed in a bathroom of a dwelling unit are on what type of circuit?Bathroom Branch156
9138153741QQ. A circuit that goes from the SEP to a sub panel is called what?Feeder157
9138160354QQ. The grounded conductor is connected to the ______ bar in the SEP.Neutral158
8941051849What is the service drop clearance of a residential walk way?10 feet159
8889012835What do we normally call a grounded conductor?NEUTRAL160
8889053177A circuit breaker protects ____________ from becoming overloaded.WIRES161
8889073997In 14-2 WG, what color are the insulated wires?WHITE & BLACK162
8889134889In 14-3 WG, what color are the insulated wires?WHITE, BLACK, & RED163
8889173765Current passing through resistance produces _________HEAT164
8889184013A residential electrical service provides ______ & ______ volts to the dwelling120 & 240165
8889194402On a receptacle what color is the ground screw?GREEN166
8889219521What AWG feeds a small appliance circuit?#12167
8889228127The required amperage of a small appliance circuit is how many amps?20168
8889235640How many watts are specified for a small appliance circuit?1500169
8889250956General purpose lighting circuits are wired with what gauge wiring?#14170
8889269752General purpose lighting circuits wired with #14 AWG, have a circuit break rated at how many amps?15171
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