diff --git a/tryton.cfg b/tryton.cfg
index ed7afc7..72c9d4d 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -15,4 +15,4 @@ xml:
     equipment.xml
     sale.xml
     purchase.xml
-    
\ No newline at end of file
+    uom.xml
\ No newline at end of file
diff --git a/uom.xml b/uom.xml
index dd7e69b..0d241cc 100644
--- a/uom.xml
+++ b/uom.xml
@@ -9,7 +9,7 @@ this repository contains the full copyright notices and license terms. -->
         <record model="product.uom" id="uom_electrical">
             <field name="name">Volt</field>
             <field name="symbol">V</field>
-            <field name="category" ref="uom_cat_electrical"/>
+            <field name="category" ref="uom_cat_electrical_tension"/>
             <field name="rate" eval="1."/>
             <field name="factor" eval="1."/>
             <field name="rounding" eval="1."/>
@@ -18,10 +18,10 @@ this repository contains the full copyright notices and license terms. -->
 	<record model="product.uom.category" id="uom_cat_electrical_power">
             <field name="name">Radian Power</field>
         </record>
-	<record model="product.uom" id="uom_electrical">
+	<record model="product.uom" id="uom_electrical1">
             <field name="name">Watt</field>
             <field name="symbol">W</field>
-            <field name="category" ref="uom_cat_electrical"/>
+            <field name="category" ref="uom_cat_electrical_power"/>
             <field name="rate" eval="1."/>
             <field name="factor" eval="1."/>
             <field name="rounding" eval="1."/>
@@ -30,14 +30,14 @@ this repository contains the full copyright notices and license terms. -->
 	<record model="product.uom.category" id="uom_cat_frecuency">
             <field name="name">Frequency</field>
         </record>
-	<record model="product.uom" id="uom_electrical">
-            <field name="name">Hertz/field>
+	<record model="product.uom" id="uom_electrical2">
+            <field name="name">Hertz</field>
             <field name="symbol">Hrz</field>
-            <field name="category" ref="uom_cat_electrical"/>
+            <field name="category" ref="uom_cat_frecuency"/>
             <field name="rate" eval="1."/>
             <field name="factor" eval="1."/>
             <field name="rounding" eval="1."/>
             <field name="digits" eval="0"/>
-        </record>
+	</record>
     </data>
 </tryton>