Can the factory leads of the SDSA1175 surge protective device be extended by splicing or adding conductor length, without violating manufacturer specifications or affecting device performance?

Issue:
Can the SDSA1175 leads be lengthened without affecting compliance or performance?

Product Line:
Surge Arrestors

Environment:
SDSA1175

Resolution:
No. To ensure optimal performance, the SDSA1175 should be installed as close as possible to the protected circuit to minimize lead length. Each additional foot of conductor can introduce approximately 160 V of let-through voltage (based on a 6 kV / 3 kA, 8/20 µs surge). The device’s Voltage Protection Rating (VPR), as tested per UL 1449 standards, is measured six inches from the enclosure. Square D does not recommend extending the leads, as doing so may alter the clamping voltage from published specifications.

Released for: Schneider Electric Canada