RFI Filter 3- or 4-pole?

[azhapp]

My cust has a CorCom filter CDEUL400400B6-S, which is a 400A, 277/480v AC 60Hz with Surge protection RFI Power Filter. The filter box has 4 filters; the contractor has wired the 3 phases to the filters, leaving one filter as a spare. Somehow, I'm thinking the neutral was s'posed to be wired to the filter too...as in, NO spare filter in the box. Ya? No?

 

[gar]

080708-2049 EST

At Tyco Corcom that number did not produce a result.

A Corcom phone number is 1-847-680-7400.

The following part does not correlate with what you have
http://www.cor.com/Series/3Phase/CFN/

Your part number looks like a Cornell-Dublier number with the CD in the part number.
http://www.cde.com/
CDE used to make filters, but does not now appear to do so.

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[azhapp]

Thanks for the post, gar. It is indeed a Corcom Tyco... http://www.cor.com/Series/Facility/CDEUL/
I got the phone no from their web site earlier, and have left them a message hoping someone will call me in the am. I've left messages for a couple other folks too, who've installed these filters before; they really WILL call me back. LOL!

 

[dbuckley]

Wire up that fourth filter to neutral. if ytou dont, then the RFI might be blocked on the phases, but there is no similar protection for the neutral...

 

[azhapp]

dbuckley, My thoughts exactly.....the neutral can carry back signals we DON'T want outside. I shall discuss with the mfgr asap