Index: trunk/resources/data/validator/numeric.mapcss
===================================================================
--- trunk/resources/data/validator/numeric.mapcss	(revision 18385)
+++ trunk/resources/data/validator/numeric.mapcss	(revision 18535)
@@ -373,5 +373,8 @@
 }
 
-way[voltage][voltage =~ /(.*[A-Za-z].*)|.*,.*|.*( ).*/] {
+way[voltage][voltage =~ /(.*[A-Za-z].*)|.*,.*|.*( ).*/],
+way[voltage:primary][voltage:primary =~ /(.*[A-Za-z].*)|.*,.*|.*( ).*/],
+way[voltage:secondary][voltage:secondary =~ /(.*[A-Za-z].*)|.*,.*|.*( ).*/],
+way[voltage:tertiary][voltage:tertiary =~ /(.*[A-Za-z].*)|.*,.*|.*( ).*/] {
   throwWarning: tr("voltage should be in volts with no units/delimiter/spaces");
   assertMatch: "way voltage=medium";