Safety Basics
–Considered the biggest safety hazard.
Electric Shock
informs electricians of a material’s physical properties, as well as the effects on health that make the material dangerous to handle.
Safety Data Sheets (SDS)
Often called “channel-lock” or “tongue-and-groove” plier; used to hold and tighten raceway couplings and connectors, and to hold and turn conduit and tubing.
Pump plier
Three Primary NRTL's
–Underwriters Laboratories, Inc. (UL)
–CSA International (CSA)
–Intertek Testing Services (ITS)
Conductors in residential wiring are usually installed in a cable assembly, they are made of
•Copper
•Aluminum
•Copper-clad aluminum
Temperature can be as high as 35,000 degrees Fahrenheit.
Arc Flash
The acronym PASS can be used as a guide on how to operate a fire extinguisher. The second “S” is to remind you to
sweep the nozzle back and forth at the base of the fire until it is extinguished.
Pulls wires or cables through electrical conduit and pulls/pushes cables in wall or ceiling cavities.
Fish Tape and Reel
Many AHJs base their approval of electrical equipment on whether it is listed and labeled by an
Nationally Recognized Testing Laboratories (NRTL)
Conductors used in residential wiring typically range in size from
14 AWG to 2/0 copper.
What are three general categories of electrical hazards that a residential electrician could be exposed to?
electrical shock
arc-flash
arc-blast
Ladders should extend at least_______ when placed against a structure shorter than the ladder.
3 feet above the top support
Must be used when working on “live” electrical equipment.
Insulated Tools
•Usually made of PVC, phenolic, or polycarbonate
•Lightweight, strong, very easy to install, and inexpensive
•Used with a nonmetallic-sheathed cable wiring method
Nonmetallic Device Boxes
They are used when several conductors are spliced together at a point on the wiring system.
Junction Boxes
The speed of the molten metal is estimated at 700 mph.
Arc-Blast
An _______means the boots are approved for electrical work.
EH marking
Common bit used with a right-angle drill.
Forstner bit
Most common metal device box size
3" x 2" x 3-½"
The NEC® requires that each conductor be color coded to indicate the function that it performs in a circuit.
What does a Black conductor represent in a residential wiring circuit?
Used as an ungrounded or “hot” conductor and carries the current to the load in 120-volt circuits.
Personal fall arrest systems could be used at heights of _______ or more and must be used when the scaffold platform is less than 18 inches wide.
10 Feet
A free fall from a scaffold when using a fall arrest system is limited to_______
6 feet
If using tools outside, use an extension cord designed for outdoor use marked...
“W-A” or “W”
This type of Metal box is primarily used for surface mounting and can accommodate one device such as a receptacle or switch.
the “handy” or “utility” box.
Conductor sizes larger than 4/0 are listed in kcmil.
kcmil stands for?
1000 circular mils.