Update to overhead line conductor doc

docs/Module/Powerflow/Overhead_line_conductor.md

@@ -13,6 +13,8 @@ GLM:
     rating.summer.emergency "<decimal> A";
     rating.winter.continuous "<decimal> A";
     rating.winter.emergency "<decimal> A";
+    weight "<decimal> lb/ft";
+    strength "<decimal> lb";
   }
 ~~~
 
@@ -78,6 +80,22 @@ Continuous winter amp rating
 
 Emergency winter amp rating
 
+### `weight`
+
+~~~
+  double rating.winter.emergency[A];
+~~~
+
+Cable weight per lineal foot
+
+### `strength`
+
+~~~
+  double rating.winter.emergency[A];
+~~~
+
+Cable strength
+
 # Example
 
 ~~~