blue
bright
cable
charge
communication
construction
danger
dawn
dusk
electric
electrical
electricity
energy
engine
engineering
environment
evening
facility
frame
generator
grid
high
industrial
industry
infrastructure
line
link
mesh
metal
mountain
network
object
power
pylon
silhouette
single
sky
steel
sunset
supply
technology
tower
transmission
urban
volt
voltage
watt
wire
wiring
work