IP vs NEMA ratings

Here's a table that shows the correlation between IP (Ingress Protection) ratings and NEMA (National Electrical Manufacturers Association) enclosure ratings. While the standards have different focuses, this table provides an approximate equivalence:

IP Rating	IP Description	NEMA Rating	NEMA Description
IP20	Protection against solid objects >12.5 mm, no water protection	NEMA 1	Indoor use, protection against dust and light accidental contact.
IP22	Protection against solid objects >12.5 mm, dripping water	NEMA 2	Indoor use, protection against limited water and dust exposure.
IP54	Limited dust ingress, splashing water from any direction	NEMA 3	Outdoor use, protection against windblown dust, rain, and sleet.
IP55	Limited dust ingress, jets of water from any direction	NEMA 4	Indoor or outdoor use, protection against splashing and hose-directed water.
IP56	Limited dust ingress, strong jets of water	NEMA 4X	Like NEMA 4, with added corrosion resistance (outdoor or wash-down environments).
IP66	Dust-tight, strong jets of water	NEMA 6	Temporary submersion in water, indoor or outdoor use.
IP67	Dust-tight, immersion in water up to 1m for 30 minutes	NEMA 6P	Submersion in water for prolonged periods, added corrosion protection.
IP68	Dust-tight, continuous submersion in water	NEMA 6P	Similar to IP68 but typically rated for specific depths and durations.