background
blue
business
cable
clear
communication
connection
construction
current
danger
distribution
electric
electrical
electricity
energy
engineering
frame
generator
high
industrial
industry
infrastructure
light
line
nature
network
old
outdoor
pillar
pole
post
power
pylon
rural
sky
steel
structure
supply
support
system
tall
technology
telephone
tower
transmission
utility
volt
voltage
watt
wire