high voltage danger sign in industrial setting

danger warning sign highvoltage electricity hazard electricalhazard safety industrial warningsign caution highvoltagesign electricshock risk warningsymbol lightningbolt industrialsafety workplacesafety safetysign electricalsafety power energy electricityhazard cautionsign metal pipes equipment facility factory plant industry machinery structure steel warningsymbol triangle yellow black blue grey outdoor infrastructure powerplant electricalgrid electricalsystem