diff --git a/tests/schema.json b/tests/schema.json
index baa947cd..dc9e8152 100644
--- a/tests/schema.json
+++ b/tests/schema.json
@@ -177,6 +177,10 @@
                         "nema-l6-20p",
                         "nema-l6-30p",
                         "nema-l6-50p",
+                        "nema-l14-20p",
+                        "nema-l14-30p",
+                        "nema-l21-20p",
+                        "nema-l21-30p",
                         "ita-e",
                         "ita-f",
                         "ita-ef",
@@ -254,6 +258,10 @@
                         "nema-l6-20r",
                         "nema-l6-30r",
                         "nema-l6-50r",
+                        "nema-l14-20r",
+                        "nema-l14-30r",
+                        "nema-l21-20r",
+                        "nema-l21-30r",
                         "ita-e",
                         "ita-f",
                         "ita-g",