Index: /trunk/src/org/openstreetmap/josm/data/validation/tests/UnconnectedWays.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/data/validation/tests/UnconnectedWays.java	(revision 6762)
+++ /trunk/src/org/openstreetmap/josm/data/validation/tests/UnconnectedWays.java	(revision 6763)
@@ -128,5 +128,5 @@
         @Override
         public boolean isPrimitiveUsable(OsmPrimitive p) {
-            return super.isPrimitiveUsable(p) && p.hasKey("power");
+            return super.isPrimitiveUsable(p) && p.hasTag("power", "line", "minor_line", "cable");
         }
     }