Installing SPD units using standard off-the-shelf cable can increase the clamping voltage unless the cable length is kept short.
Current Technology's High Performance Interconnect System (HPI) SPD Connection System provides the lowest possible impedance connection improving SPD performance. The HPI Interconnect System has 25% of the typical impedance of regular cable and allows the installer to increase the interconnection cable length by up to 4 times, while maintaining acceptable clamping voltage levels.