UL RP 121203:2021 PDF Download

UL RP 121203:2021 is a recommended practice that provides guidance for the use of portable/personal electronic products in hazardous (classified) locations. It specifically focuses on Class I, Division 2; Class I, Zone 2; Class II, Division 2; Class III, Division 1; Class III, Division 2; Zone 21, Group IIIA only; or Zone 22, Groups IIIA and IIIB only hazardous (classified) locations.

The standard outlines that it is not suitable for product certification. It also states that it is not suitable for evaluating products powered by premises wiring or connected to a communication line during use in the hazardous location, products powered by power sources other than battery or photovoltaic cell, products intended for different zones or divisions, or products intended for mining applications.

Additionally, the standard specifies that it is not suitable for evaluating types of portable/personal electronic products that are already certified for hazardous locations by an OSHA Nationally Recognized Testing Laboratories (NRTL). Examples of NRTL certified products include radios, flashlights, cell phones, tablets, cameras, and test instruments.

The recommended practice includes notes on the typical Division system standards and Zone system standards for these products. It also mentions that in the United States, an OSHA interpretation requires the use of certified, listed, or labeled products if available and allows for testing and inspection by the owner/operator when such products are not available.

Furthermore, the standard clarifies that it does not address other considerations involving the use of portable/personal electronic products that may be unsafe due to distractions from important work tasks or radio frequency interference with measurement and control equipment.