Filter
Top Products
Installation and Operation Manual 11
Location of SPD Install Type 2 SPDs on the load side of the main Overcurrent Protection Device
(OCPD) to comply with NEC Article 285 for Type 2 SPDs.
Locate the SPD as close as possible to the circuit being addressed to minimize
the wire length and optimize SPD performance. Avoid long wire runs so that the
device will perform as intended. To reduce the impedance that the wire displays
to surge currents, the phase, neutral, and ground conductors must be routed
within the same conduit and tightly bundled or twisted together to optimize
device performance. Avoid sharp bends in the conductors. See Figure 2.
Figure 2: SPD Wiring
To load(s)
Phases
Neutral
Ground
Ground bus
Neutral bus
SPD
Phase A
Phase B
Phase C
Neutral
Ground
Panel
Interconnect wiring
– Minimize length
– Avoid sharp bends
Location