If you are looking for an official PDF of CEI 31-35, the standard is protected by copyright and must be purchased from authorized distributors. Due to regional differences in electrical and safety standards, this Italian guide is not a mandatory document in China. However, it is a useful reference for practitioners involved in international projects or those wanting to understand European practices.
The official digital version can be legally acquired through the CEI MyNorma Catalog . For complete access to all historical variants, structural updates, and specialized testing annexes, users can review procurement details directly on platforms like Intertek Inform or the NSAI Standards Store . Key Regulatory Evolution
