black
board
box
breaker
cable
cargo
circuit
clip
close
complex
conductor
connection
construction
contact
control
current
danger
electric
electrical
electronic
energy
equipment
flat
fuse
generator
icon
industrial
isolated
junction
knife
laptop
light
metal
mount
off
plug
power
safety
simple
switch
system
train
turn
unplug
up
wall
wire
world