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National Electrical Code Top Ten Tips: Articles 670 and 675 -- MachineryThe NEC has two Articles that provide requirements for machinery:
With that spread of Article numbers, there's room for adding other categories of machinery some day. It's anybody's guess what those might be, but there are four slots available. It's interesting that this series comes right after Article 669, which is a very short article providing requirements for electroplating equipment. Since electroplating is an industrial process, it would have been more logical to include it as Part III of Article 670 (with the existing text being divided into Part 1 General and Part II for the remainder). Then, various subcategories of industrial machinery could have their own Parts in Article 670 if those end up needing specific requirements developed.
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