1. Lightning Fundamentals · Page 6 of 6
Common Myths About Lightning Protection
Clear up misconceptions that lead to under-protected installations.
Myth: lightning rods make SPDs unnecessary
External LPS (air terminals, down conductors, earth electrodes) manage direct attachment. SPDs manage electrical transients on power and signal circuits. You usually need both.
Myth: one SPD at the main board is enough
A single entrance SPD leaves residual voltage and locally induced surges. Sensitive electronics often need coordinated Type 2 / Type 3 stages.
Myth: UPS replaces SPD
A UPS can ride through short interruptions, but many UPS inputs remain vulnerable to high-energy surges unless protected upstream and at the load.