Why bonding beats isolation myths

During a surge, trying to "isolate everything from earth" often creates dangerous potential differences. Bonding creates a common reference so SPDs and insulation see less stress.

What to bond

Main earthing bar, cable armor, metal pipes, cable trays, LPS down conductors, and SPD PE terminals should form a coherent bonding network per local code.

Star vs mesh

Sensitive rooms sometimes use structured bonding (star or mesh-BN). The SPD earth must still land on that system with minimal length.