High Voltage NEC 600V+ Circuit Protection

What defines 'high voltage' will vary  across industries, locations, and application types.  The International Electrotechnical Commission defines high voltage as 1000VAC or 1500VDC and greater.  The National Electric Code in the United States makes a distinction between voltage greater than or less than 600V; while the National Electrical Manufacturers Association defines high voltage as any voltage greater than 100KV.  It is always best to consult your local regulatory and professional trade groups to find out more about the specifics on handling high voltage. Learn More