Ground Fault Circuit Interrupter (GFCI)

Image Part Number Description / PDF Quantity Rfq
1301530169

1301530169

Woodhead - Molex

30A/120V INLINE GFCIMANU25FT SUP

0

1301530070

1301530070

Woodhead - Molex

15A GFCIMANUAL6FT 14W/15W47 WATE

0

1301530191

1301530191

Woodhead - Molex

30A/240V INLINE GFCIMANUAL6FT SU

0

1301530240

1301530240

Woodhead - Molex

30A, 240VAC 3PHASE, 24" 10 GA

0

1301530159

1301530159

Woodhead - Molex

20A/240V GFCIAUTO25FT WATERTITEN

0

1301530075

1301530075

Woodhead - Molex

GFCI OUTLET BOX 125V 2'

0

1301530141

1301530141

Woodhead - Molex

GFCI OUTLET BOX 120V 2' 10

0

1301530178

1301530178

Woodhead - Molex

GFCI IN-LINE W/PLUG CONN 30A

0

1301530163

1301530163

Woodhead - Molex

GFCI IN-LINE SPLICE 120V 2'

0

1301530225

1301530225

Woodhead - Molex

15051-25M W/2447 NEMA L5-15 PLUG

0

1301530051

1301530051

Woodhead - Molex

GFCI IN-LINE SPLICE 120V 6'

0

1301530194

1301530194

Woodhead - Molex

30A/240V GFCIMANUAL2FT WATERTITE

0

1301530092

1301530092

Woodhead - Molex

15A GFCI PLUGMANUAL2FTMLD 5-15

0

SB6100-111-0

SB6100-111-0

Wickmann / Littelfuse

GFCI SHOCK BLOCK 240V NEMA ENCL

2

1301530095

1301530095

Woodhead - Molex

15A GFCI PLUGAUTO25FTMLD 5-15

0

1301530204

1301530204

Woodhead - Molex

20A/240V IN-LINE GFCI 6 FT

0

1301530201

1301530201

Woodhead - Molex

30A/240V IN-LINE GFCI 1 FT

0

SB6100-010-0

SB6100-010-0

Wickmann / Littelfuse

GFCI SHOCK BLOCK 208V CHASSIS

0

SB6100-200-0

SB6100-200-0

Wickmann / Littelfuse

GFCI SHOCK BLOCK 480V CHASSIS

1

SB6100-101-0

SB6100-101-0

Wickmann / Littelfuse

GFCI SHOCK BLOCK 240V NEMA ENCL

0

Ground Fault Circuit Interrupter (GFCI)

A Ground Fault Circuit Interrupter (GFCI) is an electrical safety device designed to protect personnel from electric shock by detecting and interrupting hazardous ground fault currents. It monitors the balance of current between the hot and neutral conductors in a circuit, tripping the circuit when an imbalance exceeds a predetermined threshold (typically 4-6 mA). GFCIs are critical in modern electrical systems, particularly in damp or high-risk environments, and are mandated by national electrical codes (e.g., NEC Art. 210.8) for specific applications.

Type Functional Characteristics Application Examples
Receptacle GFCI Integrated into standard outlets; protects downstream devices Kitchens, bathrooms, outdoor outlets
Circuit Breaker GFCI Installed in distribution panels; protects entire branch circuits Residential main panels, industrial equipment
Portable GFCI Plug-in or cord-connected devices; temporary protection Construction sites, poolside equipment
Deadfront GFCI Wall-mounted unit without receptacle; provides visual status indicators Commercial laundry rooms, HVAC systems

A typical GFCI contains:

  • Current Transformer: Detects differential current between hot and neutral wires
  • Electronic Control Module: Processes sensor signals and triggers tripping
  • Solenoid Trip Mechanism: Physically disconnects the circuit upon fault detection
  • Test/Audit Circuit: Simulates ground faults for periodic self-testing
  • Enclosure: Flame-retardant thermoplastic housing with moisture-resistant seals
Parameter Value/Range Significance
Nominal Current 15-50 A Defines maximum operational load capacity
Tripping Threshold 4-6 mA (UL 943 standard) Ensures human safety against lethal shocks
Response Time <25 milliseconds Minimizes exposure to hazardous currents
Withstand Voltage 1500-2500 Vrms Ensures dielectric integrity under surge conditions
Environmental Rating IP24 (indoor) to IP67 (outdoor) Determines suitability for specific installation environments

Primary Industries:

  • Residential (bathrooms, kitchens, basements)
  • Commercial (pools, spas, outdoor lighting)
  • Industrial (HVAC systems, wet location machinery)
  • Healthcare (patient care areas, sterilization equipment)

Typical Equipment: Water heaters, power tools, pool pumps, medical diagnostic devices

Manufacturer Representative Product Key Features
Square D (Schneider Electric) QO120GFI 120V, 20A circuit breaker GFCI with visual trip indicator
Leviton GFTR1-KW Portable GFCI with weather-resistant enclosure
Siemens QFG2L120N2 Two-pole GFCI breaker for multi-wire branch circuits
Eaton CHGF206 Combination GFCI/AFCI with smart panel compatibility

Key considerations:

  1. Match nominal current/voltage to circuit requirements
  2. Verify environmental rating (e.g., IP65 for outdoor use)
  3. Check compliance with local electrical codes (UL 943/CSA C22.2)
  4. Consider combination GFCI/AFCI for enhanced fire protection
  5. Evaluate self-test functionality for critical applications

Case Study: A construction site selected Leviton's portable GFCI (IP67-rated) for temporary power tools, achieving 0 electrical incidents during a 12-month project.

Emerging developments include:

  • Smart GFCIs with IoT connectivity for remote monitoring
  • Integrated GFCI/RCD solutions for dual standard compliance
  • Nanotechnology-enhanced sensors for sub-millisecond response
  • Self-powered models eliminating battery dependency
  • Increased adoption in renewable energy systems (e.g., solar inverters)
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