1
What protects a circuit in a building?
Breaker
The NEC requires the SEP be _____________ at all times.
accessible
What is a circuit directory or schedule?
A list of what breakers control what circuit.
what type of electricity is used in our homes?
ac - alternating current
what does a transformer do?
changes voltage. There are step up transformers to increase voltage and step down transformers to decrease voltage.
Where should a service entrance panel be located?
Near where the service enters the house
Where does the ungrounded service entrance conductor terminate in the SEP.
Main terminal lugs
Give 2 reasons why sub panels normally installed?
To avoid long circuit runs and for additional breaker positions.
how would you control a light from 4 locations
using (2) 3 way switches and (2) 4 way switches
This is part of an electric service and prevents moisture from entering the conduit or cable assembly
weather head
What is the maximum number of stab positions in a residential panel?
42
What can excessively long circuit runs cause?
Overheating and low power
Power supplied to a subpanel is what type of circuit?
Feeder circuit
test a receptacle with a multi meter
test
how many sheets of 4x10 drywall would be required to cover the walls and ceiling of a room that measures 14x24 with 8' ceilings (in a perfect world)
25
What are stabs?
What the breaker clips to
Circuits that require more power should be located where?
Near the top of the panel
Sub panels are required to have ________________________________? (this is different than service entrance panels)
Separate neutral and ground bus bars
test a single pole switch with a multi meter
test
The two main types of service entrance panels are (pick one)
SEP with main breaker and combination meter/SEP with main breaker outside
A load balance in a panel box would mean what?
There will be approximately even amperage pulled from each buss in the panel.
Service entrance cables are sized according to what?
Amperage
draw a diagram of power going into a light with a switch below it (switch loop) and a receptacle beside the light that is hot at all times.
diagram
the name for flexible metal conduit conduit
armored cable or bx cable