Electric Motor Control Basics - Book - Page 96
Understanding IP Ratings
Most Common IP Ratings
You’ll see any or all of these IP ratings depending on your specific trade. However, there
are a few that tend to appear more often than others. Let’s take a look at some labels
you’ll see on common enclosures.
IP65 Rating
This IP rates as “dust-tight” and protects against jets of water.
IP68 Rating
This IP rates as “dust-tight” and protects against submersion beyond one meter.
The ratings in the above list represent the most typical “waterproof” IP ratings.
Start your search here if you know your component will be around any kind of water
regularly.
Other Ratings for Electrical Enclosures
While IP ratings are the go-to standard for electrical enclosures, they aren’t the only
ones. The National Electrical Manufacturers Association (NEMA) also has a protection
rating system in place.
You’ll most often see NEMA ratings on industrial equipment manufactured in North
America.
As NEMA ratings map different protection characteristics than the IEC (such as
Industrial Control
Basics:
Part 1, Contactors
Industrial Control
Basics: Part 2,
Overload Relays
Industrial Control
Basics: Part 3,
Starters
The Benefits of Type E/F
Motor Protection
Circuit Breakers
Basic Pump Control:
Three Phase DOL Starter
Control of an Electric Pump
Applying Motor Control
in a Wastewater
Application
NEMA vs IEC Motor
Controls
Understanding
IP Ratings
96
