AskCodeMan

Seem to remember that Circuit breakers must be in a specific orientation such that Up is On and Down is Off. Therefore panels should not be installed in a horizontal orientation because half the breakers would not work in the above sequence. I am unable to find a specific cite in the NEC. Can you help me find a reference to support this idea? Thank you.

Never mind I found it. 240.81 Thank you hosting the forum.

Just received notification of your question and found that you had already found your answer - excellent.