Variable-frequency drives (VFDs) and similar heat-producing electronic and electrical equipment can be housed in a variety of NEMA-rated enclosures. For outdoor installations, the most common types are NEMA 3R and NEMA 4X stainless steel. Certain types of fiberglass enclosures are rated NEMA 4X, but generally are not suitable for housing heat-producing equipment. While the NEMA Website defines each type of enclosure, interpretation is needed to determine which enclosure is best for a ...

Register For Free or Sign In to Access

"Printer-friendly" is FREE to access as a registered user on HPAC.com. Why register for HPAC.com? It's simple and free, and provides:

  • Access to exclusive articles and news coverage
  • The full version of all monthly digital editions dating back to 2010
  • Allows you to comment on articles and discuss news with HPAC's editors
  • Gain valuable media content and more!

Already registered? here.