Ground Fault Circuit Interrupter (GFCI)

Image Part Number Description / PDF Quantity Rfq
1301530139

1301530139

Woodhead - Molex

20A GFCI MANUAL W/3080-10 BOX&14

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1301530079

1301530079

Woodhead - Molex

GFCI OUTLET BOX 120V 50'

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1301530020

1301530020

Woodhead - Molex

15A GFCIAUTO2FTMLD 5-15

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1301530054

1301530054

Woodhead - Molex

GFCI IN-LINE SPLICE

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1301530061

1301530061

Woodhead - Molex

15A GFCIAUTO25FT 14W/15W47 WATER

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1301530148

1301530148

Woodhead - Molex

20A IN-LINE GFCI AUTO-RESET

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1301530270

1301530270

Woodhead - Molex

20A/120VMANGFCI W/25'#14-3SOOW N

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1301530271

1301530271

Woodhead - Molex

20A/120VMANGFCI W/50'#14-3SOOW N

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1301530187

1301530187

Woodhead - Molex

GFCI IN-LINE SPLICE 240V 25'

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1301530037

1301530037

Woodhead - Molex

GFCI IN-LINE SPLICE 125V 6'

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1301530231

1301530231

Woodhead - Molex

20A GFCI MANUAL 5.2FT W/2747 CON

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1301530042

1301530042

Woodhead - Molex

GFCI IN-LINE SPLICE 120V 2'

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1301530093

1301530093

Woodhead - Molex

GFCI PLUG 125V 2'

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1301530241

1301530241

Woodhead - Molex

30A, 208VAC 3PHASE, 24" 10 GA

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1301530077

1301530077

Woodhead - Molex

GFCI OUTLET BOX 120V 50'

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1301430135

1301430135

Woodhead - Molex

14W47 W25FT 14-3SJOW 15W47 GFCI

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1301530080

1301530080

Woodhead - Molex

15A GFCI PLUG W/DUAL DUPLEX

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1301530022

1301530022

Woodhead - Molex

15A IN-LINE GFCI W/PLUG &CONN

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1301430110

1301430110

Woodhead - Molex

1447 100'12-3 SJOW-A 1547 GFCI

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1301530074

1301530074

Woodhead - Molex

GFCI OUTLET BOX 125V 25'

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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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