Mastering Surge Protection Installations - Understanding & Avoiding a Common Mistake: "Double Tapping"
Just because something is relatively common in practice, doesn’t mean it’s always correct. In fact, we’re seeing surge protection installations that aren’t just incorrect–they also go against the National Electrical Code (NEC) and can ultimately result in an electrical safety hazard. What’s the main issue? “Double tap” installations of line side Type 1 surge protective devices. We aren’t going to bury the lede on this one, so here’s a key takeaway for installers and integrators: a Type 1 surge protective device (SPD) doesn’t need to be installed on the line side of the main breaker, so avoid the issue entirely [...]