NNNY is the category code number for UL 1203, which in turn specifies the safety requirements for control cabinets used in potentially explosive atmospheres.
What does NNNY mean?
NNNY is what is known as a Category Code Number (CCN). CCNs are not abbreviations, but rather alphabetic and alphanumeric codes. All UL-certified products are assigned to a specific product category. The respective product category can be identified by the CCN. Products—in this case, control cabinets—with the Category Code Number NNNY are approved for use in potentially explosive atmospheres .
NNNY: Products for Potentially Explosive Atmospheres
The safety requirements for control cabinets in potentially explosive atmospheres are defined in UL 1203. This standard is based on the regulations of the National Electrical Code (NEC, NFPA 70). It must be ensured that no ignition source can arise in the control cabinet at any time, such as those caused by arcing or flying sparks. A control cabinet that has been proven to meet these requirements may be designated as “explosion-protected” and/or “dust-explosion-protected.”
Important for selecting components: the product category NNNY
The Category Code Number is an important factor in selecting components for building a control cabinet. 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 —in conjunction with appropriate planning and design of the control cabinet—ensures sufficient explosion protection to meet the requirements of UL 1203.
UL 1203 and NNNY
The UL 1203 standard and the Category Code Number (CCN) NNNY are interdependent. UL 1203 specifies the requirements that control cabinets for hazardous locations must meet 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.
How can I find out if a manufacturer is assigned Category Code Number NNNY?
It is easy to verify whether a manufacturer is certified under UL 1203. UL provides information about certified manufacturers in its database UL Product iQ . There, you can search by any Category Code Number (CCN). Under the respective CCN, you’ll find the approved manufacturers along with their assigned product categories. Of course, you’ll also find us at Krayer listed there under NNNY.
Is the NNNY also available in Canada?
Yes, manufacturers certified in the U.S. under UL 1203 also fall under the corresponding category code number in Canada. However, the CCNs have slightly different designations, as they are typically supplemented with a suffix in Canada in accordance with CSA standards; for example, NNNY is called NNNY-7 in Canada.
Zusammenfassung
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. Under NNNY, you can easily find all manufacturers and their corresponding product categories—including, of course, Krayer Systemtechnik.
