alert
arrow
attention
cable
caution
cautious
charge
current
danger
dangerous
death
electric
electrical
electricity
energy
generator
grid
hazard
high
icon
industrial
industry
lightning
power
powerline
protection
risk
rod
safety
security
shock
sign
station
substation
sun
sunset
symbol
technology
tower
transformer
transmission
triangle
volt
voltage
warn
warning
watts
yellow