blue
box
cable
capacitor
city
communication
conductor
connect
connection
current
danger
distribution
electric
electrical
electricity
energy
equipment
gray
grid
high
industry
installation
insulator
line
lines
mast
metal
network
old
pillar
pole
post
power
pylon
rusty
sky
steel
structure
substation
supply
system
technology
telegraph
telephone
transmission
volt
voltage
white
wire
wires