UL 943C OUTLINE

OUTLINE OF INVESTIGATION FOR SPECIAL PURPOSE GROUND-FAULT CIRCUIT-INTERRUPTERS

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Organization: UL
Publication Date: 2 November 2012
Status: active
Page Count: 26
scope:

These requirements cover ground-fault circuit-interrupters intended for use in one of the following applications:

a) Where the voltage to ground is greater than 150 volts and equipment grounding or double insulation is required by the National Electrical Code, ANSI/NFPA 70,

b) Where the voltage to ground is 150 volts or less and equipment grounding or doubleinsulation is provided, but the use of a Class A ground-fault circuit-interrupter is not practical.

Ground-fault circuit-interrupters addressed by these requirements are divided into three classes, Class C, D and E, based upon voltage rating and the characteristics of the grounding circuit. Some are intended for use in circuits where grounding is not provided to the load but double-insulation is provided.

These ground-fault circuit-interrupters are intended to be applied on circuits as shown in Figure 1.1. The requirements for Class A ground-fault circuit-interrupters are in the Standard for Ground-Fault Circuit-Interrupters, UL 943.

Document History

UL 943C OUTLINE
November 2, 2012
OUTLINE OF INVESTIGATION FOR SPECIAL PURPOSE GROUND-FAULT CIRCUIT-INTERRUPTERS
These requirements cover ground-fault circuit-interrupters intended for use in one of the following applications: a) Where the voltage to ground is greater than 150 volts and equipment grounding or...
January 18, 2011
OUTLINE OF INVESTIGATION FOR SPECIAL PURPOSE GROUND-FAULT CIRCUIT-INTERRUPTERS
These requirements cover ground-fault circuit-interrupters intended for use in one of the following applications: a) Where the voltage to ground is greater than 150 volts and equipment grounding or...

References

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