Index: trunk/data/validator/geometry.mapcss
===================================================================
--- trunk/data/validator/geometry.mapcss	(revision 10026)
+++ trunk/data/validator/geometry.mapcss	(revision 10028)
@@ -229,5 +229,5 @@
 way[highway] > node[shop][!entrance],
 way[highway] > node[tourism][!entrance][tourism!=viewpoint] {
-        throwWarning: tr("{0} node connected to a highway", "{0.key}");
+  throwWarning: tr("{0} node connected to a highway", "{0.key}");
 }
 
@@ -254,2 +254,11 @@
   throwWarning: tr("Too large building");
 }
+
+/* #12577 */
+way[power=line] > node,
+way[power=minor_line] > node,
+way[power=cable] > node {
+  set node_in_power_way;
+way[!power][!building] > node.node_in_power_way {
+  throwWarning: tr("Node connects a power line or cable with an object which is not related to the power infrastructure.");
+}