Index: /trunk/data/tagchecker.cfg
===================================================================
--- /trunk/data/tagchecker.cfg	(revision 6342)
+++ /trunk/data/tagchecker.cfg	(revision 6343)
@@ -164,4 +164,5 @@
 *    : W : reservoir_type       == * && landuse != reservoir && water != reservoir     # reservoir_type without landuse/water=reservoir
 *    : W : bunker_type          == * && military != bunker                             # bunker_type without military=bunker
+*    : W : power == /line|cable/     && voltage != *                                   # power line without voltage
 
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