alert
area
attention
background
beware
black
caution
circuit
current
danger
dangerous
electric
electrical
electrician
electricity
electrifying
electrocute
electrocuted
electrocution
energy
fence
hazard
hazardous
high
high voltage
icon
industrial
industry
lightning
nobody
notice
power
reflection
risk
safety
security
shock
sign
signal
substation
symbol
tension
triangle
voltage
volts
warn
warning
white
yellow
zone