What is the typical ampere rating of the outlet servicing the dryer?
answer
30
question
T/F - An electric clothes dryer requires a separate circuit
answer
T
question
T/F - All electrical appliances are required to have a disconnecting means
answer
T
question
T/F- For permanently connected motor driven appliances a disconnect switch or circuit breaker in the panel board may swerve as the disconnecting means
answer
T
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T/F - The "unit switch" on an appliance is an acceptable disconnect for an appliance as long as the switch has a marked "Off" position
answer
T
question
The nameplate of an appliance must show what 2 things?
answer
Volts and Amperes/Volts and Watts
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What is the minimum load used when calculating branch circuit requirements for a dryer?
answer
5000 Watts or the nameplate rating of the dryer (whichever is larger)
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T/F - Appliances must be marked with the minimum supply conductor ampacity and maximum over current protection
answer
T
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T/F - If an electric dryer or range is wired with the neutral wire as the ground and it meets 1996 code requirements the wiring needs to be redone
answer
F
question
T/F - The branch circuit that supplies the dryer receptacle can also pick up other receptacles
answer
F
question
How is cable designated for use with submersible pumps marked?
answer
"Submersible pump cable"
question
Most general purpose NEMA motors are rated to operate at what % of the motor's rated voltage?
answer
10%
question
A disconnecting means for a motor must do what 3 things?
answer
1. Open all ungrounded conductors 2. Open all poles simultaneously 3. Not close automatically
question
T/F - An individual disconnect must be in sight of e controller and must disconnect the controller
answer
T
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What is the definition of "in sight"?
answer
The controller must be visible and not more than 50' from the disconnect
question
T/F - The disconnect does not need to be in sight of the motor and the driven machinery
answer
T - Only if the disconnect can be individually locked in the open "OFF" position
question
T/F - Multiple disconnects are not needed if one disconnect is in sight of the (1) controller (2) motor (3) driven machinery
answer
T
question
What is the high temperature cutoff for residential water heaters?
answer
190 Degrees
question
What temperature does the T/P relief valve open?
answer
210 Degrees
question
The T/P relief valve is located within how many inches of the top of the water heater?
answer
6"
question
Discharge piping for the T/P relief valve must be installed how many inches above the floor?
answer
6"
question
A typical residential water heater is provided how many volts?
answer
240
question
High watt density heating elements are generally what shape?
answer
U-shaped
question
Low watt density heating elements are generally what shape?
answer
Double looped
question
What is the definition of "speed of recovery"?
answer
The time required to bring water temperature to satisfactory levels in a given length of time
question
(Single non-motor operated electrical appliances) What is the amperage of the overcurrent protection device if the appliance does not exceed 13.3 amps?
answer
20 amps
question
(Single non-motor operated electrical appliances) What is the amperage of the overcurrent protection device if the appliance does exceed 13.3 amps?
answer
150% of the appliance rating
question
What 7 things are flexible cords not permitted to be?
answer
1. Used as a permanent wiring method 2. Run through holes in walls and ceilings 3. Run through doorways and windows 4. Attached to building surfaces 5. Concealed above ceilings or in walls and floors 6. Installed in raceways 7. Used where subject to physical damage
question
What is the length of flexible metal whips?
answer
3'-6'
question
What letters are used for ungrounded terminal marking?
answer
X and Y
question
What letter is used for neutral terminal marking?
answer
W
question
What letter is used for ground terminal marking?
answer
G
question
T/F - The food disposal and the dishwasher can be connected to the 20 amp circuits servicing the kitchen countertops?
answer
F
question
What is the minimum and maximum cord lengths for a food disposal?
answer
18"-3'
question
What is the minimum and maximum cord lengths for dishwashers?
answer
3'-4'
question
T/F - All conductors for a single circuit don't need to be contained in the same raceway or cable tray
answer
F
question
What is the minimum amount of CFM needed to service the exhaust fan requirements of a 2000 square foot house?
answer
6000 CFM - SF x 3
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What is the minimum exhaust fan square footage to service a house with a required 6500 CFM?
answer
8.7 square feet - CFM / 750
question
What is the main difference between a hydromassage tub and a regular bathtub?
answer
The recirculating piping system and the electric pump
question
"Hot" conductors can't be what 4 colors?
answer
1. Green 2. White 3. Gray 4. Three white stripes
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What 2 colors can the grounded conductors (neutral) be?
answer
1. White 2. Gray
question
What 2 colors can the equipment grounding conductor (ground) be?
answer
1. Green 2. Green with yellow stripe
question
What is the definition of a "switch loop"?
answer
The conductors that run to and from a switched outlet and the switch controlling that outlet
question
What is the definition of a "return"?
answer
The conductor that runs from the switch back to the switched outlet. It is part of the switch loop.
question
Double-Pole Switches are commonly used to control what?
answer
240V loads such as dryers and motors
question
T/F - GFCI receptacles break both hot and neutral conductors
answer
T
question
T/F - GFCI breakers break both hot and neutral conductors
answer
F - GFCI breakers break only the hot conductor
question
How does a GFCI work?
answer
A GFCI monitors the current balance between the ungrounded "hot"conductor and the grounded conductor. As soon as the current flowing through the "hot" conductor is in the range of 4-6 milliamps more than the current flowing in the return "grounded" conductor the GFCI trips off.
question
T/F - A GFCI protects against electrical shocks that occur when a person holds both the circuit conductors at the same time
answer
F - It won't trip because the current flowing through both conductors is the same. There is no current lost to ground.
question
T/F - A GFCI does not limit the magnitude of the ground-fault current
answer
T - What a GFCI does limit is the length of time that the ground fault flows.
question
T/F - Fire and smoke alarms should be connected to a GFCI protected circuit
answer
F - The fire and smoke alarms will nuisance trip
question
What is the manufacturer recommended maximum length of a GFCI protected branch circuit?
answer
250'
question
What is the maximum allowable current "leakage" for cord-and-plug appliances?
answer
0.5 milliamps
question
Where is AFCI protection required?
answer
Circuits supplying outlets installed in family rooms, dining rooms, living rooms, parlors, libraries, dens, bedrooms, sun rooms, recreation rooms, closets, hallways, and other similar rooms
question
What is an outlet?
answer
A point on the wiring system at which current is taken to supply utilization equipment
question
What is an AFCI designed to do?
answer
Sense and respond to an arcing fault that could develop into a fire
question
T/F - All AFCI devices provide GFCI protection
answer
F
question
T/F - Permanently installed fire alarm systems are not GFCI or AFCI protected?
answer
T
question
What are 2 types of arcing that AFCI devices protect against?
answer
1. Series Arcs 2. Parallel Arcs
question
When does series arcing occur?
answer
When a current carrying conductor breaks or becomes loose. The current tries to jump across the opening created by the break or loose connection.
question
When does parallel arcing occur?
answer
When current tries to jump back and forth between the hot and neutral conductors. This typically happens because of nails driven into the wire or staples are too tight.
question
What type of AFCI device is mandatory in the panel where the branch circuit originates?
answer
Combination AFCI. It provides AFCI protection for both the branch/feeder and the outlets
Can a neutral conductor of a multi-wire branch circuit be shared when using AFCI and GFCI devices?
answer
No. Not unless the device is listed for sharing a neutral.
question
T/F - The mandatory requirement for AFCI protection is only for new construction
answer
T
question
T/F - All receptacles listed in 210.52 are required to be tamper resistant
answer
T
question
What do the letters "TR" on a receptacle represent?
answer
Tamper resistant
question
What do the letters "WR" on a receptacle represent?
answer
Weather resistant
question
All 15 and 20 amp receptacles installed in damp and wet locations are required to be what?
answer
Weather resistant
question
What are examples of a "damp location"?
answer
1. Carport roof 2. Patio
question
T/F - Outlets that are not part of the permanent wiring of the building and is used for temporary construction power are required to be GFCI protected
answer
T
question
T/F - Outlets that are a part of the permanent wiring of the building and is used for temporary construction power are not required to be GFCI protected
answer
F - If it is used for temporary construction power it needs to be GFCI protected.
question
What the exception for using GFCI protected receptacles for temporary power on a construction site?
answer
Writing and updating a "Assured Equipment Grounding Conductor Program"
question
What does IDCI stand for?
answer
Immersion detection circuit interrupter
question
Where are IDCIs found?
answer
On the end of cord-and-plug appliances like a hair dryer
question
What 2 types of transients do surge protection devices (SPD) protect against?
answer
1. Ring wave (originate within the building) 2. Impulse (originate outside the building)
question
Fluorescent luminaires surface mounted on low-density fiberboard must have what spacing from the fiberboard?
answer
1.5"
question
What are the 3 types of recessed luminaires?
answer
1. Type Non-IC (cannot be buried in thermal insulation) 2. Type IC (can be buried in thermal insulation) 3. Inherently Protected (can be buried in thermal insulation)
question
Type Non-IC luminaires have what minimum clearance from thermal insulation?
answer
3"
question
Type Non-IC luminaires have what minimum clearance from combustible materials?
answer
.5"
question
Junction boxes must be at least how far from luminaires?
answer
12"
question
T/F - Any conductors can run through junction boxes that serve luminaries
answer
F - Conductors not used for the luminaires cannot be run through luminaire junction boxes unless the boxes are labeled for through wiring
question
T/F - Conventional recessed luminaires can be used for sloped ceiling
answer
F
question
Luminaires installed in a dropped ceiling must have what label?
answer
"Suspended Ceiling Luminaire"
question
What is the maximum distance between points of support for wiring NM and NMC cable to suspended ceiling luminaires? All other wiring methods?
