Αποτελέσματα Αναζήτησης
GFCI Product Standards. The most relevant standard for GFCIs in the USA is UL943. For Canada it is CSA C22.2 For Mexico it is NMX-J-520. Although the numbering is different in each case, the three countries share the same basic GFCI requirements.
In the US we differentiate between two types of ground-fault protective devices, GFCIs/GFIs and GFEPs. GFCIs comply with UL 943 and can be used for personnel protection. GFEPs comply with UL 1053 and can be used for equipment protection (Figure 1). The main difference between these two types is their sensitivity to ground-faults.
Ground Fault Circuit Interrupters. Features. Available in 1-pole (15-30A) and 2-pole smaller form (15-30A) and bigger (35 - 60A) Available in 10kA, 22kA and 65kA interrupting rating . Includes Self Test as required by UL943 as an added safety feature.
The Ground Fault Circuit Interrupter (GFCI) provides protections against overloads, short circuits, and ground faults. The GFCI breakers detect low levels of electrical current leakage (ground faults), and acts quickly to shut off power with a purpose of preventing serious shock What is a ground fault?
Class A GFCI device. It states that a Class A GFCI trips when the current to ground has a value in the range of 4 milliamps to 6 milliamps, and references UL 943, the Standard for Safety for Ground-Fault Circuit-Interrupters. Section 210.8 of the NEC covers specific applications where GFCI protection for personnel is required. In dwelling units,
A ground fault circuit interrupter (GFCI) is an electronic device that can operate quickly to prevent electric shocks from electrical shorts. During normal operation of an electrical appliance, the current flowing through the conductors into a GFCI generally equals the flow of current returning from the appliance to the GFCI.
If the GFCI detects or senses a difference or change in current, or “leakage” known as a “ground fault,” the GFCI shuts off, “trips, or breaks,” the circuit stopping the flow of electricity immediately, thereby protecting a worker from a potentially dangerous shock.
