{"id":12724,"date":"2024-03-19T18:16:04","date_gmt":"2024-03-19T17:16:04","guid":{"rendered":"https:\/\/b3v39j.myrdbx.io\/ul-wissen\/ul-wiki\/nnny\/"},"modified":"2026-07-31T19:57:29","modified_gmt":"2026-07-31T17:57:29","slug":"nnny","status":"publish","type":"wiki","link":"https:\/\/krayer.de\/en\/ul-wissen\/ul-wiki\/nnny\/","title":{"rendered":"NNNY"},"content":{"rendered":"\n

NNNY<\/strong> is the category code number<\/a> for UL 1203<\/a><\/strong>, which in turn specifies the safety<\/a> requirements for control cabinets used in potentially explosive atmospheres.<\/p>\n\n

What does NNNY mean?<\/h2>\n\n

NNNY is <\/strong>what is known as a Category Code Number<\/strong> (CCN<\/a>). CCNs are not abbreviations, but rather alphabetic<\/strong> and alphanumeric codes<\/strong>. All UL-certified products are assigned to a specific product category<\/strong>. The respective product category can be identified by the CCN. Products\u2014in this case, control cabinets\u2014with the Category Code Number NNNY<\/strong> are approved for use in potentially explosive atmospheres <\/a><\/strong>. <\/p>\n\n

NNNY: Products for Potentially Explosive Atmospheres<\/h2>\n\n

The safety requirements for control cabinets in potentially explosive atmospheres<\/strong> are defined in UL 1203<\/strong>. This standard is based on the regulations of the National Electrical Code (NEC, NFPA 70<\/a>). It must be ensured that no<\/strong> ignition source can arise in the control cabinet at any time<\/strong>, such as those caused by arcing or flying sparks. A control cabinet that has been proven to meet these requirements may be designated as \u201cexplosion-protected\u201d<\/strong> and\/or \u201cdust-explosion-protected.\u201d <\/p>\n\n

Important for selecting components: the product category NNNY<\/h2>\n\n

The Category Code Number<\/a> is an important factor in selecting components for building a control cabinet<\/strong>. For a control cabinet intended for use in a potentially explosive atmosphere, only components listed in the approved Category Codes of UL 1203 may be installed. This is because only the use of such components<\/strong> \u2014in conjunction with appropriate planning and design of the control cabinet\u2014ensures sufficient explosion protection to meet the requirements of UL 1203. <\/p>\n\n

\"\"<\/figure>\n\n

UL 1203 and NNNY<\/h2>\n\n

The UL 1203 standard<\/a> and the Category Code Number (CCN) NNNY are interdependent. UL 1203<\/strong> specifies the requirements that<\/strong> control cabinets for hazardous locations must meet<\/strong> and lists the CCNs that are approved under this UL standard. The individual CCNs, in turn, specify which parts and components may be used to construct a control cabinet so that it complies with UL 1203. <\/p>\n\n

How can I find out if a manufacturer is assigned Category Code Number NNNY?<\/h2>\n\n

It is easy to verify whether a manufacturer is certified under UL 1203. UL provides information about certified manufacturers in its database <\/strong>UL Product iQ<\/strong><\/a> . There, you can search by any Category Code Number (CCN). Under the respective CCN, you\u2019ll find the approved manufacturers along with their assigned product categories. Of course, you\u2019ll also find us at Krayer listed there under NNNY<\/strong>. <\/p>\n\n

\"The<\/figure>\n\n

Is the NNNY also available in Canada?<\/h2>\n\n

Yes<\/strong>, manufacturers certified in the U.S. under UL 1203 also<\/strong> fall under the corresponding category code number in Canada<\/strong>. However, the CCNs have slightly different designations, as they are typically supplemented with a suffix in Canada in accordance with CSA<\/a> standards; for example, NNNY is called NNNY-7<\/strong> in Canada. <\/p>\n\n

Zusammenfassung<\/strong><\/h2>

<\/p>\n\n

The UL 1203 standard defines the requirements for control cabinets in hazardous locations. NNNY, in turn, is the Category Code Number for this standard and specifies which parts and components may be used in the control cabinet to ensure it complies with UL 1203. To find components with the Category Code Number (CCN), you can use the UL Product iQ database<\/a>. Under NNNY, you can easily find all manufacturers and their corresponding product categories\u2014including, of course, Krayer Systemtechnik. <\/p>\n\n

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