architecture
background
black
cable
communications
construction
distribution
electric
electrical
electricity
energetic
energy
engineer
engineering
equipment
generation
generator
graphic
high
illustration
industrial
industry
infrastructure
line
metal
network
plant
power
powerful
pylon
shape
silhouette
sketch
station
steel
structure
supply
symbol
tall
technology
tower
transformer
transmission
transmit
union
volt
voltage
watt
wire