Tag Archives: Field Evaluation
Marijuana Farms Skirt Laws – EMC & Product Safety Laws, That Is
According to a recent article by a San Francisco-area police officer, indoor marijuana grows are proliferating and many of them are illegal. Due to their frequent use of uncertified equipment that is manufactured overseas with little to no regulatory oversight, there has been a significant amount of radio frequency interference (RFI) that leaves these operations... Read More
Electric Sign Safety Governed by UL 48 and NEC Article 600
The National Electrical Code (NEC) Article 600 and UL 48 Standard for Safety for Electric Signs are used to evaluate the field installation and construction of electric signs in the U.S. In Canada, the relevant guidelines are the Canadian Electrical Code (CEC) and CSA 22.2 No. 207. All signs that are electrically operated and/or electrically... Read More
Top 20 Non-Compliance Findings for Panel & Motor-Operated Equipment
Here at MET Labs, we’ve been product safety testing electrical/electronic equipment in the field for over 55 years. Naturally, we see the same failures over and over again. We hope this list of Top 20 Field Failures for Panel & Motor-Operated Equipment will help inspectors identify and contractors fix the most commonly observed non-compliances. 1.... Read More
AHJs Use NFPA 790 & 791 to Qualify Labs for Electrical Equipment Field Evaluations
Authorities Having Jurisdiction (AHJs) in the United States have typically used the National Electrical Code, NFPA 70, as the basis for approving electrical equipment installations in the United Sates. Much of the Code relies on having products manufactured and certified by a recognized testing laboratory to consensus-based U.S. product safety standards. In Canada, the AHJs... Read More
NFPA 790 and NFPA 791 Now a Criterion for Field Evaluation Bodies
In the U.S. workplace, the Occupational Safety and Health Administration (OSHA) mandates that all electrical equipment be safety certified. Many state, county and local jurisdictions also have similar requirements. However, equipment is sometimes installed that has not been certified or has been modified after installation. Then, a field evaluation may be necessary, as determined by... Read More
