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Protect workers with our 7x10 Warning Unlawful to Operate Equipment Within 20 Feet of High Voltage Sign. Made from durable .040 polystyrene plastic, this sign is designed to withstand both indoor and outdoor conditions, offering moisture and weather resistance. The bold warning text alerts workers to avoid operating equipment near high-voltage lines, ensuring safety compliance. With pre-drilled mounting holes and rounded corners, this sign is easy to install and ideal for construction sites, factories, or utility areas.