diff --git a/powersimdata/input/change_table.py b/powersimdata/input/change_table.py
index 0def6baf7..303e3d051 100644
--- a/powersimdata/input/change_table.py
+++ b/powersimdata/input/change_table.py
@@ -643,6 +643,9 @@ def add_bus(self, info):
             the information needed to create a new bus.
             Required keys: "lat", "lon", ["zone_id" XOR "zone_name"].
             Optional key: "Pd".
+        :raises TypeError: if info is not a list.
+        :raises ValueError: if each element of info is not a dict with appropriate keys
+            and values.
         """
         allowable_keys = {"lat", "lon", "zone_id", "zone_name", "Pd", "baseKV"}
         defaults = {"Pd": 0, "baseKV": 230}
@@ -654,6 +657,8 @@ def add_bus(self, info):
 
         try:
             for i, new_bus in enumerate(info):
+                if not isinstance(new_bus, dict):
+                    raise ValueError("Each entry in the list must be a dict")
                 new_bus = new_bus.copy()
                 if not set(new_bus.keys()) <= allowable_keys:
                     unknown_keys = set(new_bus.keys()) - allowable_keys