Installation and connection to service must be done only when the system is de-energized. Its application is to be compliant with its rating and therefore must not be installed in a more severe environment subjecting it to higher voltages, currents or energy levels than for which its technical specifications provide.

It is designed for indoor applications and must be placed in a suitable rated NEMA enclosure if the system is to be in a harsher environment. Opening or tampering with the thermoplastic enclosure may damage the effective operation of the SPD and is inadvisable and will void the warranty.

Section 250 of the NEC and IEEE Green Book, Standard 142 should be consulted. Local electrical codes and/or the Canadian Electrical code have to be considered. System voltage: Make sure that the SPD is correctly rated for the system where the SPD should be applied. The maximum continuous operating voltage

(MCOV) must not be exceeded. Mounting: Make sure that the SPD is installed as close as possible to the device to be protected. The SPD must be provided with a suitable end-product enclosure having adequate strength and thickness and with acceptable spacings being provided. The conductor length for these

connections must be kept as short and as straight as possible. The SPDs are to be mounted on the 35 mm DIN rail. The DIN rail is to be securely mounted to the back of the interior of the panel using ¼ inch bolts every 8 inches (200 mm). The SPDs can either be slid on the DIN rail from open end or put on the

DIN rail by compressing the spring loaded clamping device on the lower back of each unit. The SPDs shall permit sufficient clearance for conductor power and signaling connections. Conductor Connections: Phase connections to the SPD and ground side connections from the SPD to the ground bus must be of

the wire size indicated in the technical specifications. Insulation should be stripped back as described on the previous page. All conductor terminal screws shall be tightened to the torque indicated in the technical data. Some SPDs employ two grounding terminals, however they have only been evaluated for

single-port applications only. The suitability of the use of the grounding connection as an equipment grounding conductor has not been determined. As such, the combination of this product in the end-use application to comply with the applicable end-product Fault Current Testing requirements shall be determined.

Grounding: Make sure that the grounding of the SPD is as short and straight as possible with the specified wire size according to the technical data. Use a local equipotential bonding bar if possible. For proper operation the SPD must be connected to a low impedance ground. Remote Contact Signaling: In case