blue
cable
city
conductor
current
danger
distribution
electric
electrical
electricity
energy
engine
engineering
environment
equipment
generation
generator
grid
high
industrial
industry
infrastructure
insulator
isolator
landscape
line
metal
nature
network
outdoor
pillar
pole
post
power
pylon
road
sky
station
steel
structure
supply
tall
technology
telephone
tower
transformer
transmission
tree
utility
volt
voltage
watt
wire