Follow a step-by-step process: mark the location, drill holes, insert anchors, and secure the box for a weatherproof fit. Apply weatherproof sealant around the box edges and cable entry points to prevent water ingress. Installing a secure, weatherproof electrical box is a necessity for safely bringing power outside a home for lighting, tools, or other devices. The harsh nature of the outdoor environment requires components and installation methods engineered to resist moisture intrusion, temperature fluctuations. In this video, I'll show you how to install a weatherproof outdoor electrical box — safe, secure, and code-compliant. NOTE: Some text links below go to applicable products on Amazon.