Ground Fault Circuit Interrupter (GFCI)

Image Part Number Description / PDF Quantity Rfq
1301530053

1301530053

Woodhead - Molex

15A GFCIMANU6FT14/1547 5-15 SUPE

0

SB6100-110-0

SB6100-110-0

Wickmann / Littelfuse

GFCI SHOCK BLOCK 240V CHASSIS

0

1301360066

1301360066

Woodhead - Molex

GFCI IN-LINE SPLICE 25'

0

1301530196

1301530196

Woodhead - Molex

GFCI IN-LINE SPLICE 125V 25'

0

1301530155

1301530155

Woodhead - Molex

240V/20A GFCI INLINEAUTO2FT WATE

0

1301530215

1301530215

Woodhead - Molex

20A GFCI MANUAL2.25FT.TTAP W/125

0

1301530023

1301530023

Woodhead - Molex

GFCI IN-LINE SPLICE 120V 25'

0

SB6100-100-0

SB6100-100-0

Wickmann / Littelfuse

GFCI SHOCK BLOCK 240V CHASSIS

0

1301530232

1301530232

Woodhead - Molex

20051-0M 5FT LONG, 2647 PLUG & 2

0

1301530056

1301530056

Woodhead - Molex

GFCI IN-LINE SPLICE 125V 2'

0

1301530085

1301530085

Woodhead - Molex

GFCI OUTLET BOX 125V 2'

0

D7524.13.05

D7524.13.05

General Cable

GFCI PLUG WITH RECEPTACLE 125V

0

1301530198

1301530198

Woodhead - Molex

GFCI IN-LINE W/PLUG CONN 30A

0

1301530130

1301530130

Woodhead - Molex

20A/120V INLINE GFCIMANU25FT WAT

0

1301430103

1301430103

Woodhead - Molex

1447 W50FT 14-3-SJOW 1547 GFCI

0

1301530019

1301530019

Woodhead - Molex

GFCI IN-LINE SPLICE 120V 18"

0

1301530091

1301530091

Woodhead - Molex

GFCI PLUG 125V 2'

0

1301530164

1301530164

Woodhead - Molex

30A/120V GFCIAUTO2FT SUPER-SAFEW

0

1301530197

1301530197

Woodhead - Molex

30A/240V INLINE GFCIMANU25FT WAT

0

SB6100-011-0

SB6100-011-0

Wickmann / Littelfuse

GFCI SHOCK BLOCK 208V 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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