This may have been discussed in the dim, dark past, but here goes anyway. I have two EMCO power line LISNs, model 3810/2. Both were built such that the line and neutral sides were reversed internally. The LISNs are built with the USA standard 3-wire (grounded) outlet on the front. The orientation is with the ground connection facing down. This places the neutral side on the left and the line side on the right when viewed from the front. The power connector on the back is the familiar IEC 3-wire connector. When oriented with the ground connection facing down, it too has neutral on the left and line on the right. In order to keep neutral on the left and line on the right as viewed from the FRONT, this connector needs to be mounted with the ground connection facing UP. Both of my LISNs came to me with the ground connection facing down, causing the reversal of line and neutral.
The power connections need to be reversed at the IEC connector in order to make the line and neutral match the markings on the Line1/Line 2 switch for line and neutral (and also match the 3-wire power outlet). The easy fix is to remove the top cover of the unit and use long nose pliers swap the line and neutral connections on the IEC connector. The better fix is to remove both covers in order to rotate the IEC power connector 180°. This fix physically places all the neutral connections on the left (viewed >from the front) and line connections on the right. Donald Borowski Schweitzer Engineering Labs Pullman, Washington, USA - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
