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NTEP
What is NTEP?

IP
What is a IP Rating?

NEMA
What is a NEMA Rating?








What is Legal-for-Trade or NTEP approved, and when do I need it ?

When searching for what scale to purchase for your application, two of the most popular terms you will find is “legal-for-trade” and “NTEP approved”. Generally, in the United States a legal for trade scale must be NTEP approved, so all scales shown and listed on our website as legal for trade are NTEP approved.



NTEP stands for National Type Evaluation Program, which is a non-profit corporation. Scales and other weighing equipment that are NTEP approved have been tested and evaluated to ensure they meet all government standards and requirements. The government standards are set by the NIST (National Institute of Standards and Technology), and are listed in their NIST Handbook 44 The NIST standards cover every aspect of an NTEP approved scale from capacity, accuracy, effects on the scale from temperature and humidity, and even how the manufacturers label is to appear on the scale. It is the standards in the NIST Handbook 44 that your local Weights and Measures inspector(s) will typically use when inspecting your scale and certifying it for use. Each NTEP approved scale will have an NTEP certificate or conformance number listed on it so that your local inspector can obtain a copy of the conformance certificate, and verify that the brand and model of your scale was manufactured within NIST standards. However, you should always check with your local Weights and Measures Department (or governing agency) as to your scales compliance, as local municipalities can impose rules and regulations that vary both from NIST and NTEP. (NTEP approval does not necessarily mean a scale is “legal for trade” and ready for use “out of the box” in your locale.)

In general, any person or business that buys, sells, or charges based upon weight within the United States must use a Legal-for-Trade scale.Manufacturers such as EasyWeigh, TorRey, CAS, AND, Ohaus, Adam Equipment, Citizen Scales, and Mettler Toledo offer a wide variety of legal for trade scales for any application. You can use our online “Retail Scale Advanced Search Tool” by clicking here, or speak with our knowledgeable sales staff by calling 800-832-0055 for assistance in selecting the right scale for your business or application.





What Does IP67 Mean?


IP stands for 'Ingress Protection'

An IP number is used to specify the environmental protection of enclosures around electronic equipment. These ratings are determined by specific tests.

The IP number is composed of two numbers, the first referring to the protection against solid objects and the second against liquids. The higher the number, the better the protection.

First Number
  • 0 - No protection (Sometimes X)
  • 1 - Protected against solid objects up to 50mm³
  • 2 - Protected against solid objects up to 12mm³
  • 3 - Protected against solid objects up to 2.5mm³
  • 4 - Protected against solid objects up to 1mm³
  • 5 - Protected against dust, limited ingress (no harmful deposit)
  • 6 - Totally protected against dust
Second Number
  • 0 - No protection (Sometimes X)
  • 1 - Protection against vertically falling drops of water (e.g. condensation)
  • 2 - Protection against direct sprays of water up to 15 degrees from vertical
  • 3 - Protection against direct sprays of water up to 60 degrees from vertical
  • 4 - Protection against water sprayed from all directions - limited ingress permitted
  • 5 - Protected against low pressure jets of water from all directions - limited ingress permitted
  • 6 - Protected against low pressure jets of water, limited ingress permitted (e.g. ship deck)
  • 7 - Protected against the effect of immersion between 15cm and 1m
  • 8 - Protected against long periods of immersion under pressure
  • 9K* -Protected against close-range high pressure, high temperature spray downs.

* What is IP69K?
The IP69K rating provides protection against ingress of dust and high temperature, high pressure water – making products with this certification ideal for use in conditions where equipment must be carefully sanitized.
In industries such as food processing, where hygiene and cleanliness is paramount, equipment must be able to withstand rigorous high pressure, high temperature wash-down procedures.
In many industries, where dust and dirt can be an issue, it is important to ensure that dust cannot penetrate the casing of a product and cause it to fail.
The IP69K rating is the highest protection available.







What is a NEMA Rating?

NEMA [NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION – USA] RATINGS
NEMA Ratings

There are many NEMA ratings available for enclosures. Below, is a brief explanation of each NEMA rating.

  • NEMA 1 General Purpose – Indoors
    Type 1 enclosures are intended for general purpose indoor use primarily to provide a degree of protection against contact with the enclosed equipment or locations where unusual service conditions do not exist.
  • NEMA 2 Drip Proof – Indoors
    Type 2 enclosures are intended for general purpose indoor use primarily to provide a degree of protection against limited amounts of falling water and dirt.
  • NEMA 3 Dust Tight, Rain Tight, & Ice/Sleet resistant – Indoors/Outdoors
    Type 3 enclosures are intended for general purpose outdoor use primarily to provide a degree of protection against windblown dust, rain, and sleet; and to be undamaged by the formation of ice on the enclosure.
  • NEMA 3R Rain Proof & Ice/Sleet Proof – Indoors/Outdoors
    Type 3R enclosures are intended for general purpose outdoor use primarily to provide a degree of protection against falling rain; and to be undamaged by the formation of ice on the enclosure.
  • NEMA 3S Dust Tight, Rain Tight, & Ice/Sleet Proof – Outdoors
    Type 3S enclosures are intended for general purpose outdoor use primarily to provide a degree of protection against sleet; and to be undamaged by the formation of ice on the enclosure.
  • NEMA 4 Water Tight & Dust Tight – Indoors/Outdoors
    Type 4 enclosures are intended for general purpose indoor or outdoor use primarily to provide a degree of protection against windblown dust and rain, splashing water, and hose directed water; and to be undamaged by the formation of ice on the enclosure.
  • NEMA 4x Water Tight, Dust Tight, & Corrosion Resistant – Indoors/Outdoors
    Type 4X enclosures are intended for general purpose indoor and outdoor use primarily to provide a degree of protection against corrosion, windblown dust and rain, splashing water, and hose-directed water; and to be undamaged by the formation of ice on the enclosure.
  • NEMA 5 Superseded by NEMA 12 for Control Apparatus
    Type 5 see NEMA 12
  • NEMA 6 Submersible, Water Tight, Dust Tight, & Ice/Sleet Resistant – Indoors/Outdoors
    Type 6 enclosures are intended for general purpose indoor or outdoor use primarily to provide a degree of protection against the entry of water during temporary submersion at a limited depth; and to be undamaged by the formation of ice on the enclosure.
  • NEMA 7 Underwriters Lab Class 1-Groups C&D -Explosion Proof – Indoors
    Type 7 enclosures are for indoor use in locations classified as Class I, Groups A, B, C, or D, as defined in the National Electrical Code. Type 7 enclosures shall be capable of withstanding the pressures resulting from an internal explosion of specified gases, and contain such an explosion sufficiently that an explosive gas-air mixture existing in the atmosphere surrounding the enclosure will not be ignited. Enclosed heat generating devices shall not cause external surfaces to reach temperatures capable of igniting explosive gas-air mixtures in the surrounding atmosphere. Enclosures shall meet explosion, hydro-static, and temperature design tests.
  • NEMA 8 Underwriters Lab Class 1-Groups C&D -Explosion Proof – Indoors
    Type 8 is same as NEMA 7, except the unit is oil-immersed
  • NEMA 9 Underwriters’ Lab Class II – Groups E,F,G – Indoors
    Type 9 enclosures are intended for special purpose indoor use in locations classified as hazardous (Class II, Groups E, F, or G, as defined in the National Electrical Code). Type 9 enclosures shall be capable of preventing the entrance of dust. Enclosed heat generating devices shall not cause external surfaces to reach temperatures capable of igniting or discoloring dust on the enclosure or igniting dust-air mixtures in the surrounding atmosphere. Enclosures shall meet dust penetration and temperature design tests, and aging of gaskets (if used).
  • NEMA 10 Bureau of Mines
  • NEMA 11 Corrosion Resistant & Drip Proof – Oil Immersed – indoors
  • NEMA 12 Industrial Use – Dust Tight & Drip Tight – Indoors
    Type 12 enclosures are intended for industrial indoor use primarily to provide a degree of protection against dust, falling dirt, and dripping noncorrosive liquids.
  • NEMA 13 Oil Tight & Dust Tight – Indoors
    Type 13 enclosures are intended for industrial indoor use primarily to provide a degree of protection against dust, spraying of water, oil, and noncorrosive coolant
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