UL 498B OUTLINE

Description / Abstract: These requirements cover a receptacle with integral switching means rated 600 V or less, used in ordinary dry locations and intended for connection to a branch circuit in accordance with the National Electrical Code, NFPA 70.

A receptacle with integral switching means covered by this Outline shall meet the following requirements:

a) No voltage greater than 600 V above ground will be present in the device,

b) An isolation transformer, if provided, will generally furnish power at a lower potential than the primary voltage; and

c) The output of the device will not be located in a circuit operating at greater than 600 V above ground.

d) The switching device shall be integral to the receptacle.

e) A receptacle that is marked with the symbol shown in Table SA8.1 Reference No. 2 and does not employ an integral switching means intended for energy management and building automation, are covered by the Standard for Attachment Plugs and Receptacles, UL 498.

This Outline does not directly apply to, but may supplement the following standards:

a) Devices produced integrally with flexible cord or cable, covered by the Standard for Cord Sets and Power-Supply Cords, UL 817;

b) Current taps and adapters covered by the Standard for Current Taps and Adapters, UL 498A;

c) Devices employing male or female screwshells, covered by the Standard for Lampholders, UL 496;

d) Single and multipole connectors intended for factory assembly to copper or copper alloy conductors or printed wiring boards for use in data, signal, control and power applications within and between electrical equipment, covered by the Standard for Component Connectors for Data, Signal, Control and Power Applications, UL 1977;

e) Devices intended for installation and use in hazardous (classified) locations in accordance with the National Electrical Code, NFPA 70, covered by the Standard for Explosion-Proof and Dust-Ignition-Proof Equipment for Use in Hazardous (Classified) Locations, UL 1203;

f) Devices intended for use with telecommunications networks, covered by the Standard for Information Technology Equipment – Safety – Part 1: General Requirements, UL 60950-1, or the Standard for Communications Circuit Accessories, UL 1863;

g) Devices incorporating ground-fault circuit interruption circuitry, covered by the Standard for Ground-Fault Circuit Interrupters, UL 943;

h) Direct plug-in devices incorporating transient voltage surge suppression circuitry, covered by the Standard for Surge Protective Devices, UL 1449;

i) Direct plug-in devices incorporating electromagnetic interference filter circuitry, covered by the Standard for Electromagnetic Interference Filters, UL 1283;

j) Cord-connected, relocatable power taps intended only for indoor use as a temporary extension of a grounding alternating-current branch circuit for general use, covered by the Standard for Relocatable Power Taps, UL 1363.

k) Energy management equipment covered by the Standard for Energy Management Equipment, UL 916.