diff --git a/app/models/power_distribution_unit/card.rb b/app/models/power_distribution_unit/card.rb
new file mode 100644
index 000000000..7825ec6a8
--- /dev/null
+++ b/app/models/power_distribution_unit/card.rb
@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+
+class PowerDistributionUnit
+  class Circuit < ApplicationRecord
+  end
+end