UL & NFPA Standards

UL & NFPA Standards

UL & NFPA Standards

USA UL and NFPA Standards for machineries

UL 891 is a tristandard. That means it is exacly the same content in the following three norms:
- CSA Group: CSA C22.2 No. 244-05
- Underwriters Laboratories Inc: UL 891
- Association of Standardization and Certification: NMX-J-118/2-ANCE-2012.

The subjects are the SWITCHBOARDS, also called in North America "dead-front switchboard". In Europe the equivalent standards are the EN 61439-1 and EN 61439-2. However the approach is different. EN 61439 puts a lot of emphasis on the Design Verification and cabinet testing. UL 891 is mainly about how to design the switchboard.

The Standard applies to switchboards nominally rated at 600 V or less and intended for use in accordance with the Canadian Electrical Code, Part 1 (CE Code, Part 1), the National Electrical Code (NEC), ANSI/NFPA 70, and the Mexican Standard for Electrical Installations (Utility), NOM-001-SEDE.
These requirements cover switchboards for use on circuits having available RMS symmetrical short-circuit currents of not more than 200 000 A.

C22.2 N°301
 C22.2 N°301: Machinery Electrical Equipment
In December 2016, the first Canadian Standard on electrical equipment of machines, C22.2 N°301, was published. This Standard is intended to specify the applicable electrical requirements for industrial machinery needed to satisfy the electrical installation codes and practices for Canada. When third-party verified and appropriately marked as meeting the requirements of this Standard, the machinery is deemed compliant for installation in a non-hazardous location in accordance with the rules of the Canadian Electrical Code, Part I and to be acceptable to the electrical authority having jurisdic
UL 891
UL 891: Switchboards
UL 891 is a Tristandard. That means it is exactly the same content in the following three norms: CSA Group: CSA C22.2 No. 244-05. Underwriters Laboratories Inc: UL 891. Association of Standardization and Certification: NMX-J-118/2-ANCE-2012. The subjects are the SWITCHBOARDS, also called in North America "dead-front switchboard". In Europe the equivalent standards are the EN 61439-1 and EN 61439-2. However the approach is different. EN 61439 puts a lot of emphasis on the Design Verification and cabinet testing. UL 891 is mainly about how to design the switchboard. The Standard applies
UL 508A
UL 508 A Industrial Control Panels
UL 508A is the technical standard for the Industrial Control Panels in USA. Starting from the basics of electrical safety, stated by the NEC, it gives prescriptions for the design of control panels. While the NFPA 79 provides prescriptions for industrial machinery, UL508A is focused on the criteria in order to design the control panel. In Europe, the reference standards are EN 61439 (for switchboards) and EN 60204-1 (for industrial control panels). The lastest release of this standard was in May 2018: UL 508A Ed. 3 has been designated as an American National Standard (ANS). This designation