sven, what model & voltage meter is it? is it an "A" base or an "S" type. the "S" type is a socket meter.the "A" base is self contained , no socket needed.if it's an A line side is left two terminals & load are the right two terminals.if you hook it up wrong it'll go backwards, unless it appens to be a SANGAMO "H".that's the way they run.hope this helps.ERWIN
