What do the NEMA ratings mean?
What do the NEMA ratings mean?
NEMA ratings are standards that are useful in defining the types of environments in which an electrical enclosure can be used. The NEMA rating system is defined by the National Electrical Manufacturer Association, and frequently signifies a fixed enclosure’s ability to withstand certain environmental conditions.
How many NEMA standards are there?
NEMA publishes more than 700 electrical and medical imaging Standards and technical whitepapers that cover millions of Member products. We believe that Standards play a key part in the design, production, and distribution of products destined for both national and international commerce.
What is a motor code?
The nameplates of alternating current (AC) motors built to National Electrical Manufacturers Association (NEMA) standards reference a system of alphabetical letters that designate the principal characteristics of each motor—code, design and insulation class. …
What’s NEMA 12?
The NEMA 12 rating is a common NEMA rating used for devices that need moderate indoor protection against dust and liquid ingress. It’s a good choice for when you need basic protection at an affordable price. A NEMA 12 rated enclosure should protect the device inside against: Accidental personnel contact.
What is NEMA Type 12?
What is KVA code?
Induction motors at starting draw larger current than normal operation current. This starting current is represented as kilo volt ampere power. Each motor has its own starting power and is set on the motor nameplate as KVA code.
What does KVA code mean?
A letter code defines the locked rotor current kVA on a per horsepower basis. The letter code consists of letters from A to V. The farther away from the letter code A, the higher the inrush current per horsepower.
What is a NEMA contactor?
NEMA (National Electrical Manufacturers Association) contactors and motor starters are rated by sizes. These sizes are grouped by rated current and power.
What are NEMA standards?
NEMA standards exist to help provide electrical products that are safe and appropriate for the service and location where they will be used. They help to eliminate misunderstandings between the customer and the manufacturer by providing uniform definitions and design standards.
What do NEMA enclosure designations mean?
The NEMA enclosure description is similar to the IEC Index of Protection (IP) code. The NEMA designations are more descriptive and general, whereas the IEC IP codes are more precise and narrowly defined by a 2-digit code, with the first digit defining how well protected the motor is from solid objects and the second digit describing how well protected the motor is from moisture.
What does NEMA 3R mean?
NEMA 3 enclosures are intended for outdoor use primarily to provide a degree of protection against windblown dust, rain, sleet, and external ice formation. NEMA 3R enclosures are typically used in outdoor applications for wiring and junction boxes.
