Hi Phil, On my 30S-1, the connections are: Terminal: 1 one side of the 220V line 2 neutral 3 & 4 jumpered 5 other side of the 220V line My serial number is 10678. 73, John, W4AWM ************************************** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour