1st Choice in Control Panel
Control Panels for the USA and Canada for Hazardous Locations (Ex Area) – UL 1203
Control panels intended for use in hazardous (explosive) environments are subject to specific UL requirements. UL 1203 is the standard for explosion-proof and dust-ignition-proof electrical equipment intended for use in classified hazardous locations.
Our UL Services
Planning
We handle the planning of control panels in accordance with the UL 1203 standard.
Manufacturing
We manufacture your control panel to meet UL 1203 standards for use in North America.
Documentation
All documentation is prepared in full compliance with UL standards.
Our Services as a UL 1203 Specialist
UL 1203 defines the safety requirements for control cabinets used in hazardous locations (HazLoc) in accordance with Articles 500–505 of the NEC (NFPA 70). This applies to control cabinets installed in:

Classes I, II, and III, Divisions 1 and 2

Class I, Zone 0, 1, and 2

Groups II A, II B, and II C.
It includes technical requirements necessary for electrical equipment to be labeled as “explosion-proof” and “dust-ignition-proof.”
The control panels must be designed in such a way that the formation of arcing components is prevented and that they can withstand elevated temperatures Under no circumstances may an ignition source be created or enter the hazardous (Ex) area. The design follows one of the NEC-approved protection methods for electrical equipment in hazardous (classified) locations.
As experts in UL certification for control panels, we have in-depth knowledge of the HazLoc requirements for the USA and Canada. Our control panels meet those strict standards, and we are authorized by Underwriter Laboratories to certify them with the UL label ourselves. Only with this label those control panels can they be operated in the USA and Canada.
Have you discovered our Wiki yet? There, we share our expert knowledge on all things related to UL-certified control panels—Whether it’s about the control panel itself, grounding, or the declaration of conformity, we’ve got you covered..
How Can Krayer Systemtechnik Support you in being UL 1203 compliant?
We go the extra mile
Excellence in UL certification must be earned—day after day. We work hard to achieve that, whether behind the scenes, in research and development, in production, or in direct collaboration with you as our customer.
Understanding Your Needs Comes First
To deliver the best solution, we begin by thoroughly understanding your specific requirements. The better we understand your needs early on, the sooner we can reach your goal together.
Hassle-Free Certification
Your UL control panel will be labeled with the appropriate UL mark directly by us, enabling immediate operation in the United States or Canada.
Do you have any questions or would like a non-binding consultation?
If you have questions about our products and services and would like to learn more about Krayer, please don’t hesitate to contact us. Our experts will be glad to assist you.
The Benefits of UL 1203 Certification for Hazardous Locations (EX Areas)
Control panels used in hazardous (Ex) areas do need to meet specific UL standards in the USA and Canada, namely “Industrial Control Panels for Use in Hazardous Locations, NNNY.”
As a recognized expert, KRAYER is both qualified and certified to build UL-compliant control panels for Ex areas under the NNNY category. All control systems and panels we manufacture in accordance with UL 1203 receive an official UL label. This offers you several key advantages:
The UL standards for control panels in hazardous locations include:
UL 121201 NONINCENDIVE ELECTRICAL EQUIPMENT FOR USE IN CLASS I AND II, DIVISION 2, AND CLASS III, DIVISIONS 1 AND 2 HAZARDOUS LOCATIONS
NFPA 496 PURGED AND PRESSURIZED ENCLOSURES FOR ELECTRICAL EQUIPMENT
UL 1203 FOR EXPLOSION-PROOF AND DUST-IGNITION-PROOF ELECTRICAL EQUIPMENT FOR USE IN HAZARDOUS LOCATIONS
KRAYER’s Industry Expertise in the HazLoc Sector
Since 1989, we have been developing, designing, and building control cabinets in Spraitbach near Schwäbisch Gmünd, Germany for use in North America. In spring 2020, we underwent what is arguably the most demanding and stringent UL certification in the field of control cabinets: certification for hazardous locations (HazLoc). Since then, we have been authorized to manufacture and certify control cabinets in accordance with UL 698A and UL 1203. These control cabinets are used in explosion-hazard environments or in areas that are connected to hazardous locations.
Our customers come from a wide range of industries and have very different requirements for their control panels in hazardous locations. However, with over 30 years of experience in UL control panel manufacturing, we know exactly what matters. That’s why we implement your specifications and expectations with precision—regardless of your industry or whether the control panel will ultimately be installed in an Ex or Ex i area.
Safe
We are experts in navigating the complex UL standards. Our certification as a certified partner of Underwriting Laboratories (UL), proves it.
Efficient
We know exactly where everything belongs. Our processes are optimized: from design and procurement to production.
Hassle-Free Certification
Your UL-certified control cabinet is labeled directly by us, allowing it to be put into operation immediately in the USA or Canada.




