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We have a system that is 347/600V, solidly grounded. One of the 600V<br />CDP`s within the facility is 3 wire and does not have a neutral pulled to<br />it. The customer is asking how it should be connected. Does only the<br />ground wire get connected and the neutral lug left unconnected?<br /><br />Please advise as to the proper installation.

The neutral and ground in the TVSS need to be jumpered/ connected for full diagnostics and protection as line to neutral is one of the modes of protection. For internal to the panel TVSS, put a message referencing this fact in the notes section as far as your 3 wire 347/600Y panel that does not pull the neutral. For external Surge Logic TVSS products such as the EMA and EBA, series it discusses this in the instruction bulletin, which I have attached.

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