ampere
backlight
blue
cable
car
clean
cloud
cord
current
danger
dusk
electric
electrical
electricity
energy
factory
force
generating
generation
industrial
industry
iron
line
metal
morning
orange
outdoor
plant
pole
post
potency
power
power plant
power supply
production
productive
pylon
red
silhouette
sky
sunrise
sunset
supply
tool
traffic
volt
voltage
warning
watt
wire