For most homes, a whole-house surge protector rated 40-80 kA is sufficient, per Scherer Electric. Choose UL 1449-certified units with a clamping voltage of 400V or less, per This Old House. This guide explores surge protector sizing, key features, and unique strategies to safeguard your home cost-effectively while ensuring compliance with safety standards. When you choose a surge protector, size is important. This works for most everyday devices. The right size helps keep your equipment safe. You probably have a smart TV, multiple computers, a high-end refrigerator, and. Proper sizing is critical for performance and longevity, involving selection of the correct electrical parameter - like maximum discharge current, voltage protection level, and response time - as well as the enclosure fits the installation environment. For industrial and commercial projects, where.
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