What does NEMA 4 mean?
Similarly, you may ask, what is the difference between NEMA 4 and 4x?
As is easily guessed, the NEMA 4X is a subset of the NEMA 4 rating, so it provides the same level of protection against outdoor weather, particularly against dirt, rain, sleet and windblown dust. The difference is that the NEMA 4X must provide additional protection against corrosion beyond that provided by the NEMA 4.
Secondly, is NEMA 4 dust tight? NEMA 4 is watertight and dust-tight for inside and outdoor applications. The 4 rating does everything NEMA 1 does plus it has protection against water getting in; rain, sleet, snow, splashing water or hose directed water. NEMA 4/4X will also not be damaged by ice forming on the enclosure.
Subsequently, one may also ask, what is the difference between NEMA 3 and 4?
NEMA 3: For indoor or outdoor use. Same as NEMA 2 but adds stronger protection against the ingress of water and dust. It protects against windblown dust, rain, sleet, and snow and will be undamaged by ice forming on the enclosure. NEMA 4: Same as NEMA 3 but adds protection against hose directed water.
What does NEMA stand for?
National Electrical Manufacturer Association