Could You Pass an Electrician's Apprentice Exam?
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Question 1
What Does The Black Wire In A Home Outlet Do?
Question 1
What Color Is The Neutral Wire In U.S. Wiring?
Question 1
What Does A Circuit Breaker Actually Do?
Question 1
What Does GFCI Stand For In Electrical Work?
Question 1
Which Room First Required GFCI Outlets By U.S. Code?
Question 1
What Does A Voltmeter Measure In Electrical Work?
Question 1
What Is The Standard Household Voltage In The United States?
Question 1
What Does The Green Wire In Electrical Wiring Represent?
Question 1
What Does AWG Stand For On Electrical Wire Labels?
Question 1
What Does It Mean When An Outlet Has A Reset Button?
Question 1
What Does An Electrician Call The Main Power Switch For A Home?
Question 1
What Is The Safest Way To Test If A Wire Is Live?
Question 1
What Does A Standard Three-Prong Outlet's Round Hole Do?
Question 1
Which Wire Gauge Is Thicker — 12 AWG Or 14 AWG?
Question 1
What Does The Term "Overloaded Circuit" Mean To An Electrician?
Question 1
What Color Is The Hot Wire In A Standard Lamp Cord?
Question 1
What Is A Junction Box Used For In Home Wiring?
Question 1
How Many Slots Does A Standard U.S. Duplex Outlet Have?
Question 1
What Does An Electrician Mean By "Running A New Circuit"?
Question 1
What Is The Purpose Of Electrical Conduit In A Building?
Question 1
What Does An Electrician Call A Single On/Off Switch?
Question 1
What Is The Colored Plastic Coating Around A Wire Called?
Question 1
Which Tool Do Electricians Use To Twist Wires Together Safely?
Question 1
What Does An Electrician Place At The End Of A Wire Connection?
Question 1
What Does An Electrician Mean By A "Dedicated Circuit"?
Question 1
What Is The Metal Panel That Holds All Home Circuit Breakers Called?
Question 1
Which Of These Is A Sign Of A Dangerous Electrical Outlet?
Question 1
What Does An Electrician Use Fish Tape For?
Question 1
What Color Wire Nut Is Used For The Smallest Wire Connections?
Question 1
What Is The Correct Name For A Standard U.S. Wall Outlet?
Question 1
What Does An Electrician Call The Two Wires That Power A Circuit?
Question 1
What Is The Purpose Of A Light Switch In A Circuit?
Question 1
What Does An Electrician Mean By A Circuit Being 240 Volts?
Question 1
Which Household Appliance Most Often Needs Its Own Dedicated Circuit?
Question 1
What Is The Name For The Protective Cap Twisted Onto Bare Wire Ends?
Question 1
What Does An Electrician Use A Conduit Bender For?
Question 1
What Does NM Stand For On A Roll Of Household Electrical Cable?
Question 1
What Is The Job Of A Dimmer Switch In A Home?
Question 1
What Does An Electrician Call Outlets Placed At Floor Level In A Wall?
Question 1
What Color Is The Label On A 20-Amp Breaker In Most U.S. Panels?
Question 1
What Does An Electrician Call The Box Behind Your Breakers?
Question 1
What Is The Purpose Of A Pigtail Wire Connection?
Question 1
What Does An Electrician Mean By A Circuit Being Grounded?
Question 1
Which Wire Color Is Typically Used For A Three-Way Switch Traveler?
Question 1
What Does An Electrician Call Wire Rated For Outdoor Use?
Question 1
What Is The Name For The Screw That Connects Wire To An Outlet?
Question 1
What Does An Electrician Use A Knockout Punch For?
Question 1
What Does The Term Arc Fault Mean In Home Wiring?
Question 1
What Is The Brass-Colored Screw On An Outlet Used For?
Question 1
What Does An Electrician Call A Switch That Controls One Light From Two Locations?
Question 1
What Is The Purpose Of A Wire Stripper Tool?
Question 1
Which Breaker Size Powers Most Standard Bedroom Circuits?
Question 1
What Does An Electrician Mean By A Hot Wire Being Live?
Question 1
What Is The Large Appliance That Typically Needs A 50-Amp Circuit?
Question 1
What Does An Electrician Call Wiring Installed Inside A Finished Wall?
Question 1
Which Tool Lets An Electrician See Exactly How Much Current Is Flowing?
Question 1
What Does An Electrician Call The Plastic Cover Over A Light Switch?
Question 1
What Does AFCI Stand For In Modern Home Wiring?
Question 1
What Is The Correct Color Of The Screw Connecting The Neutral Wire To An Outlet?
Question 1
What Does An Electrician Call The Space Between Ceiling And Roof?
Question 1
What Color Is The Handle On A Typical 15-Amp Breaker?
Question 1
What Is The Purpose Of Electrical Tape In Wiring Work?
Question 1
What Does An Electrician Call A Plug With Two Flat Prongs Only?
Question 1
What Is The Name For Wire That Connects Your Home To The Utility Pole?
Question 1
Which Of These Is A Real Type Of Electrical Conduit?
Question 1
What Does An Electrician Mean By A Circuit Being Tripped?
Question 1
What Is The Correct Term For The Plastic Box That Holds A Wall Outlet?
Question 1
What Does An Electrician Use A Multimeter For?
Question 1
What Does An Electrician Call The Label That Identifies Each Circuit Breaker?
Question 1
What Does An Electrician Call The Main Cable Entering Your Home?
Question 1
What Is The Purpose Of A Neutral Bar In A Breaker Panel?
Question 1
Which Of These Is A Real Type Of Electrical Wire Connection?
Question 1
What Does An Electrician Mean By A Circuit Being Polarized?
Question 1
What Is The Name For The Rating That Tells How Much Power A Wire Can Carry?
Question 1
What Does An Electrician Call A Light Controlled By Three Or More Switches?
Question 1
What Is The Correct Term For Electrical Work Done Without A Permit?
Question 1
What Does An Electrician Use A Torque Screwdriver For?
Question 1
What Does An Electrician Call The First Inspection Done During A Remodel?
Question 1
What Does An Electrician Call The Final Inspection After All Work Is Done?
Question 1
What Is The Name For The Plastic Ring That Protects Wire At A Box Knockout?
Question 1
What Does An Electrician Call A Breaker That Handles Two Circuits In One Slot?
Question 1
What Color Is The Outlet Face On A Hospital-Grade Receptacle?
Question 1
What Does An Electrician Use A Torpedo Level For On The Job?
Question 1
What Is The Term For Electricity That Flows In One Constant Direction?
Question 1
What Does An Electrician Call A Wire Connector Crimped Instead Of Twisted?
Question 1
What Is The Purpose Of A Load Center In A Home?
Question 1
What Does An Electrician Call The Wires That Feed Power From The Meter To The Panel?
Question 1
What Does An Electrician Call A Light Fixture Mounted Flush Against The Ceiling?
1
Carries Neutral Current
2
Carries Return Current
3
Carries Ground Current
4
Carries Live Power
Black wires carry live voltage to the device, which is why electricians always shut off the breaker before touching them.
1
White
2
Green
3
Yellow
4
Red
White wires complete the circuit by carrying current back to the panel, while green or bare copper wires handle grounding.
1
Stops Overloaded Circuits
2
Measures Power Usage
3
Boosts Electrical Voltage
4
Converts AC To DC
Thomas Edison's era used fuses for the same job, but modern breakers reset with a flip instead of needing replacement.
1
Grounded Flow Current Indicator
2
Ground Fault Circuit Interrupter
3
Ground Force Current Insulator
4
General Fuse Control Interface
GFCI outlets were required in bathrooms starting in 1975 and can detect a fault as small as 5 milliamps to prevent shock.
1
The Bathroom
2
The Garage
3
The Kitchen
4
The Laundry Room
Bathrooms got mandatory GFCI protection in 1975 because water and electricity near sinks caused thousands of electrocutions annually.
1
Wire Temperature
2
Electrical Pressure
3
Electrical Resistance
4
Current Flow Speed
Voltage is the pressure pushing electrons through a wire, the same way water pressure pushes water through a hose.
1
240 Volts
2
220 Volts
3
60 Volts
4
120 Volts
Most of Europe runs on 220-240 volts, which is why American appliances need a converter when plugged in abroad.
1
The Ground Wire
2
The Hot Wire
3
The Traveler Wire
4
The Neutral Wire
Green and bare copper wires both serve as grounds, giving stray electricity a safe path back to earth instead of through a person.
1
Ampere Wiring Grade
2
Alternating Wire Guide
3
American Wire Gauge
4
Approved Wiring Grade
Confusingly, a lower AWG number means a thicker wire — 12 AWG wire is thicker and carries more current than 14 AWG.
1
It Is A Smart Outlet
2
It Is A GFCI Outlet
3
It Is A 240-Volt Outlet
4
It Is A Surge Protector
That reset button means the outlet monitors for dangerous current leaks and can cut power in just one-fortieth of a second.
1
The Load Center
2
The Fuse Panel
3
The Junction Box
4
The Main Breaker
The main breaker sits at the top of your breaker box and can cut power to every circuit in the house at once.
1
Touch It Briefly
2
Check For Sparks
3
Smell The Wire
4
Use A Voltage Tester
A non-contact voltage tester beeps or lights up near a live wire without ever touching it, keeping electricians safe.
1
Holds The Plug Tighter
2
Carries Extra Power
3
Reduces Electricity Use
4
Provides A Ground Path
The round hole connects to the ground wire, safely redirecting stray electricity into the earth instead of through a person.
1
It Depends On Brand
2
They Are The Same
3
12 AWG
4
14 AWG
In the AWG system, lower numbers mean thicker wire — 12 AWG is standard for kitchen outlets because it handles more current.
1
Too Many Amps Drawn
2
Too Many Outlets Installed
3
Wires Are Too Long
4
Voltage Is Too High
Running too many appliances at once pulls more amps than the wire can safely carry, which is why breakers trip — they prevent fires.
1
The Ribbed Side Is Neutral
2
Color Varies By Maker
3
Both Sides Are The Same
4
The Smooth Side Is Neutral
On a lamp cord, the ribbed or ridged wire is neutral and the smooth wire is hot — a tactile code you can feel in the dark.
1
Stores Spare Fuses
2
Measures Current Flow
3
Boosts Electrical Voltage
4
Safely Encloses Wire Connections
U.S. electrical code requires all wire splices to be inside a covered junction box so no bare connections are ever exposed.
1
Six Slots
2
Eight Slots
3
Two Slots
4
Four Slots
A duplex outlet has two receptacles, each with three slots — hot, neutral, and ground — adding up to six slots total on one faceplate.
1
Upgrading The Meter Box
2
Adding A Dedicated Wire Run
3
Replacing Old Light Bulbs
4
Testing Existing Outlets
A dedicated circuit runs its own wire all the way from the breaker panel, giving one appliance — like a refrigerator — its own private power supply.
1
Grounds The Breaker Panel
2
Protects Wires Inside A Tube
3
Carries Water To Outlets
4
Insulates Against Voltage
Metal or plastic conduit acts like an armor sleeve around wires, required in garages, basements, and anywhere wires could be physically damaged.
1
Dimmer Switch
2
Single-Pole Switch
3
Three-Way Switch
4
Double-Pole Switch
A single-pole switch controls one light from one location and is the most common switch in any home.
1
Cladding
2
Grounding
3
Sheathing
4
Insulation
Electrical insulation is made from PVC or rubber and prevents dangerous accidental contact with live copper wire.
1
Needle-Nose Pliers
2
A Fish Tape
3
A Conduit Bender
4
Wire Strippers
Needle-nose pliers grip and twist wires tightly enough to hold a wire nut securely without nicking the copper.
1
A Breaker Clip
2
A Conduit Clamp
3
A Wire Nut
4
A Cable Staple
Wire nuts, invented in 1923, twist onto joined wires to hold them together and keep bare copper safely covered.
1
A Buried Underground Line
2
A Heavy-Duty Extension
3
One Outlet, One Breaker
4
A Grounded Outlet Only
Refrigerators, microwaves, and washing machines each need a dedicated circuit so no other appliance shares their power load.
1
The Junction Box
2
The Fuse Cabinet
3
The Breaker Panel
4
The Load Center
Also called a load center, the breaker panel was standardized in U.S. homes after the 1940s replaced older glass fuse boxes.
1
A Reset Button On It
2
A Plastic Cover Plate
3
Two Slots Instead Of Three
4
Scorch Marks Around It
Scorch marks mean arcing has already occurred inside the outlet — electricians treat this as an immediate fire hazard.
1
Labeling Circuit Breakers
2
Sealing Conduit Joints
3
Measuring Wire Length
4
Pulling Wire Through Walls
Fish tape is a long flexible steel ribbon that electricians feed through walls to drag new wiring from one point to another.
1
Orange
2
Blue
3
Yellow
4
Red
Yellow wire nuts are sized for two or three small-gauge wires and are the most commonly used connector in residential light fixtures.
1
A Current Port
2
A Power Terminal
3
A Plug Socket
4
A Duplex Receptacle
Electricians call it a duplex receptacle because it holds two plug connections in one device — "duplex" simply means double.
1
Positive And Negative
2
Feed And Return
3
Hot And Neutral
4
Live And Dead
Every basic circuit needs a hot wire to deliver power and a neutral wire to complete the return path back to the panel.
1
Boosts The Voltage
2
Filters The Current
3
Breaks The Hot Wire
4
Grounds The Circuit
A standard switch is wired to interrupt only the hot wire, keeping the neutral continuous — this is a basic safety rule electricians learn on day one.
1
It Needs A Bigger Fuse
2
It Has Extra Grounding
3
It Uses Two Hot Wires
4
It Runs On Batteries
240-volt circuits use two hot wires instead of one, which is why large appliances like dryers and ovens need a special four-slot outlet.
1
A Table Lamp
2
A Refrigerator
3
A Clock Radio
4
A Phone Charger
Refrigerators cycle on and off all day drawing surge current, so electrical codes recommend a dedicated 20-amp circuit to prevent tripped breakers.
1
Strain Relief
2
Conduit Fitting
3
Cable Clamp
4
Wire Connector
The plastic twist-on caps most people call wire nuts are officially called wire connectors — they were invented in 1914 and replaced the old practice of taping bare splices.
1
Tightening Panel Screws
2
Testing Circuit Voltage
3
Stripping Wire Coating
4
Shaping Metal Pipe
A conduit bender lets electricians curve rigid metal pipe around corners without kinking it, which would block wires from being pulled through.
1
Neutral Main
2
Normal Medium
3
Non-Metallic
4
New Model
NM cable, commonly called Romex, has a plastic outer jacket instead of metal armor and became the standard for home wiring after World War II.
1
Adds A Second Hot Wire
2
Grounds The Light Fixture
3
Converts AC To DC Power
4
Reduces Power To The Bulb
A dimmer switch rapidly turns power on and off dozens of times per second — your eye blends those flickers into a smooth, lower brightness level.
1
Service Drops
2
Junction Points
3
Receptacles
4
Load Centers
The correct trade term for any wall outlet is a receptacle — the word outlet technically refers to any point where electricity is drawn, including light fixtures.
1
The Handle Is Typically Red
2
The Handle Is Typically Green
3
The Handle Is Typically Blue
4
The Handle Is Typically Black
Most U.S. residential breakers use a black handle regardless of amperage — apprentices learn to read the stamped number on the breaker itself, not rely on color coding.
1
The Fuse Cabinet
2
The Load Center Box
3
The Service Panel
4
The Junction Hub
The service panel is where utility power enters your home and splits into individual circuits — electricians also call it the 'distribution board.'
1
Joins Multiple Wires To One
2
Seals A Wire End
3
Extends A Short Wire
4
Tests For Live Current
A pigtail lets several wires share one connection point safely — it is the standard fix when an outlet has more wires than terminal screws.
1
Protected By A Fuse
2
Turned Off At Panel
3
Buried Underground
4
Has A Safe Fault Path
Grounding gives stray electricity a safe path to earth instead of through a person — the concept was standardized in U.S. building codes in the 1960s.
1
Yellow
2
Orange
3
Blue
4
Red
Red wire is the standard traveler wire that carries power between two three-way switches — it is what lets you control one light from two different locations.
1
Armored Service Wire
2
Weatherproof Flex Cable
3
Exterior Grade Conduit
4
Direct Burial Cable
Direct burial cable is wrapped in a thick moisture-resistant jacket and can be buried in soil without conduit — it was introduced widely after the 1978 National Electrical Code revision.
1
Anchor Set Screw
2
Terminal Screw
3
Binding Post Screw
4
Ground Lug Screw
Terminal screws on outlets are color-coded — brass for hot, silver for neutral, and green for ground — making correct wiring much easier to remember.
1
Cutting Holes In Metal Boxes
2
Bending Conduit Ends
3
Crimping Wire Connectors
4
Stripping Thick Cable Jackets
A knockout punch cleanly removes a circular slug from a metal electrical box so conduit or fittings can pass through without rough edges that could damage wire insulation.
1
Electricity Jumping A Gap
2
Voltage Drop In A Circuit
3
A Tripped Breaker Reset
4
A Loose Neutral Wire
Arc faults happen when electricity sparks across damaged or loose wiring — they cause roughly 30,000 U.S. home fires each year, which is why AFCI breakers became code-required in 1999.
1
Connecting The Neutral Wire
2
Connecting The Hot Wire
3
Securing The Outlet Plate
4
Connecting The Ground Wire
Brass screws always mark the hot side of an outlet — the memory trick electricians teach apprentices is 'brass equals black, silver equals white.'
1
A Transfer Switch
2
A Double-Pole Switch
3
A Three-Way Switch
4
A Four-Way Switch
Three-way switches are named for their three terminal screws, not three locations — staircases and hallways almost always use a pair of them so you can flip the light from either end.
1
Tests Wire Voltage
2
Bends Wire Ends
3
Removes Wire Insulation
4
Cuts Conduit Pipe
Wire strippers have notched blades sized to each gauge so the plastic coating peels cleanly without nicking the copper underneath.
1
20 Amp
2
15 Amp
3
50 Amp
4
30 Amp
A 15-amp breaker paired with 14 AWG wire is the standard combination for lighting and general bedroom outlets in U.S. homes.
1
It Has Been Grounded
2
It Is Properly Insulated
3
It Is Freshly Installed
4
It Is Carrying Current
Electricians say a wire is live when voltage is actively flowing through it, meaning touching it without protection can cause a serious shock.
1
A Bathroom Heater
2
A Ceiling Fan
3
An Electric Range
4
A Dishwasher
Electric ranges draw so much power that the National Electrical Code has required a dedicated 50-amp circuit for them since the 1950s.
1
Concealed Wiring
2
Surface Wiring
3
Conduit Wiring
4
Exposed Wiring
Concealed wiring runs inside walls and ceilings and must meet strict code requirements because it cannot be visually inspected after drywall is installed.
1
A Wire Stripper
2
A Fish Tape
3
A Clamp Meter
4
A Conduit Bender
A clamp meter reads current by clamping around a wire without cutting into it, making it one of the safest diagnostic tools an electrician carries.
1
A Terminal Cap
2
A Junction Cover
3
A Breaker Face
4
A Wall Plate
Wall plates are purely protective covers required by code to keep fingers away from live terminals inside the electrical box behind the switch.
1
Active Flow Current Interrupter
2
Automatic Fuse Control Interface
3
Arc Fault Circuit Interrupter
4
Alternating Fault Current Indicator
AFCI breakers, required in U.S. bedrooms since 1999, detect dangerous sparking inside walls and shut off power before a fire can start.
1
Brass
2
Silver
3
Green
4
Red
Electricians learn the silver-for-neutral rule on day one — the silver screw always connects the white wire, keeping the circuit correctly polarized.
1
Attic Space
2
Crawl Space
3
Dead Zone
4
Chase Area
Electricians often run cables through attic space because it provides easy access to ceiling fixtures and junction boxes throughout the home.
1
Black
2
Blue
3
Gray
4
Red
Most U.S. breaker manufacturers use black handles for standard 15-amp breakers, while double-pole 240-volt breakers use wider handles of the same color.
1
Seals Junction Boxes
2
Holds Conduit Together
3
Insulates Bare Wire
4
Labels Circuit Breakers
Electricians use vinyl electrical tape to cover exposed conductors and re-insulate wire ends, and it has been a standard wiring supply since the 1940s.
1
A Polarized Plug
2
A Tamper-Proof Plug
3
A Two-Wire Plug
4
An Ungrounded Plug
Two-prong plugs have no ground connection, and the U.S. electrical code began requiring three-prong grounded outlets in new homes starting in the 1960s.
1
Riser Cable
2
Branch Circuit Wire
3
Service Entrance Cable
4
Feeder Wire
Service entrance cable carries electricity from the utility company directly into your meter base, and it typically delivers 240 volts to power an entire household.
1
Braided Flex Conduit
2
Copper Sleeve Conduit
3
Rigid Metal Conduit
4
Vinyl Wrap Conduit
Rigid metal conduit, often called RMC, is the heaviest and most durable pipe type and is required in areas exposed to physical damage like garages and driveways.
1
The Outlet Stopped Working
2
The Ground Wire Broke
3
The Breaker Shut Off
4
The Wiring Overheated
When a breaker trips, it automatically flips to the off position to stop current flow, a safety feature invented by engineers at Westinghouse in the early 1900s.
1
An Electrical Box
2
A Receptacle Shell
3
A Junction Cover
4
A Wiring Housing
Electrical boxes, also called outlet boxes or switch boxes, are required by code to enclose every wire connection and protect surrounding materials from heat and sparks.
1
Testing Voltage And Continuity
2
Cutting Wire To Length
3
Measuring Conduit Diameter
4
Tightening Terminal Screws
A multimeter combines several measuring functions in one tool and lets electricians check voltage, resistance, and whether a circuit is complete, all without opening a panel.
1
A Directory
2
A Circuit Map
3
A Load Chart
4
A Panel Index
The National Electrical Code requires every panel to have a legible directory so firefighters and homeowners can quickly shut off the correct circuit in an emergency.
1
Feeder Cable
2
Branch Circuit
3
Riser Wire
4
Service Drop
The service drop is the overhead wire run from the utility pole directly to your home's meter, and it carries the full load of your household power.
1
Returns Current Safely
2
Grounds The Panel Box
3
Trips Overloaded Circuits
4
Boosts Voltage Level
The neutral bar collects all returning current from every circuit and sends it back to the utility — without it, electricity has no safe path home.
1
Splice
2
Wrap Joint
3
Crimp Loop
4
Twist Seal
A splice joins two or more wires end-to-end and must be enclosed inside a junction box by U.S. electrical code for safety.
1
Hot And Neutral Are Separate
2
The Circuit Is Fully Grounded
3
Voltage Is Doubled Up
4
Both Wires Carry Power
Polarization keeps the hot and neutral wires on their correct sides, which is why one plug prong is wider than the other on modern appliances.
1
Wattage Limit
2
Voltage Rating
3
Ampacity
4
Load Factor
Ampacity was officially adopted into the National Electrical Code in 1965 and determines exactly how many amps a wire can handle before overheating.
1
Three-Way Switch Setup
2
Four-Way Switch Setup
3
Double-Pole Switch Setup
4
Multi-Circuit Switch Setup
When you can turn a light on or off from three or more locations — like a long hallway — electricians add a four-way switch between two three-way switches.
1
Unlicensed Wiring
2
Unpermitted Work
3
Off-Code Work
4
Rough-In Work
Unpermitted electrical work can void a homeowner's insurance policy and must often be torn out and redone when a house is sold and inspected.
1
Stripping Wire Insulation
2
Bending Conduit Pipe
3
Testing Wire Voltage
4
Tightening Screws To Spec
Since 2014, the National Electrical Code requires torque-tightened connections on breaker panels because loose screws are a leading cause of electrical fires.
1
Final Walkthrough
2
Panel Review
3
Rough-In Inspection
4
Code Compliance Check
A rough-in inspection happens before walls are closed up, letting the inspector verify all wiring, boxes, and conduit are correctly placed while everything is still visible.
1
Panel Audit
2
Final Inspection
3
Rough-In Check
4
Load Review
A final inspection confirms every outlet, fixture, and connection meets code before the homeowner can legally use the new wiring.
1
A Grommet Nut
2
A Conduit Clamp
3
A Strain Relief
4
A Bushing
Bushings have been a code requirement for decades because a sharp metal edge can slice through wire insulation and cause a dangerous arc.
1
A Split Breaker
2
A Piggyback Fuse
3
A Tandem Breaker
4
A Double-Pole Breaker
Tandem breakers, sometimes called slim breakers, let electricians add circuits to a full panel without installing a larger box.
1
Red
2
Gray
3
Orange
4
Green
The green triangle or green face on a hospital-grade outlet signals it meets strict UL standards for life-safety environments like operating rooms.
1
Measuring Wire Length
2
Checking Breaker Load
3
Leveling Outlet Boxes
4
Testing Ground Paths
A torpedo level is short enough to fit inside a stud bay, making it the go-to tool for mounting outlet and switch boxes perfectly straight.
1
Direct Current
2
Residual Current
3
Static Current
4
Alternating Current
Thomas Edison championed direct current in the 1880s, but Nikola Tesla's alternating current won out because it travels farther without losing power.
1
A Crimp Connector
2
A Push-In Connector
3
A Butt Splice
4
A Wire Nut
Crimp connectors are squeezed tight with a crimping tool and are preferred in automotive and marine wiring where vibration could loosen a twisted connection.
1
Measures Total Energy Used
2
Filters Power Surges
3
Boosts Incoming Voltage
4
Distributes Power To All Circuits
Load center is simply the manufacturer's term for a breaker panel — companies like Square D and Eaton use it on their product labels.
1
Branch Circuits
2
Service Conductors
3
Feeder Cables
4
Utility Leads
Service conductors carry the full amperage of your home's supply — typically 100 to 200 amps — and are always treated as live even when the main breaker is off.
1
A Pendant Light
2
A Recessed Can
3
A Track Light
4
A Flush-Mount Fixture
Flush-mount fixtures became popular in the 1950s as ranch-style homes with low ceilings replaced the tall Victorian rooms where hanging chandeliers worked well.
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