Gardner Bender WireGard yellow (GB-4) wire connectors are color-coded for quick gauge identification and engineered for copper-to-copper wire splicing. The yellow GB-4 is the medium connector for standard 14 AWG branch-circuit splicing, sized for splices in the #18-#10 AWG range. Square-wire zinc-plated steel springs grip each conductor independently, and the flame-retardant polypropylene shell shrugs off heat and physical abuse in junction boxes and fixture cavities.

• Wire range: #18-#10 AWG (copper to copper only - NOT for aluminum conductors)
• Square-wire zinc-plated steel spring grips conductors independently for vibration-resistant splices
• Flame-retardant polypropylene shell rated to 221 deg F (105 deg C) max
• Rated 600V max in building wire, 1000V max in fixtures and signs
• Color-coded shell (Yellow = GB-4) for fast at-a-glance gauge identification
• UL 486C Listed and CSA Certified for code-compliant residential and commercial use
• 25 connectors per bag

Tip: GB-4 Yellow is the standard for 14 AWG branch-circuit splicing in junction boxes for outlets, switches, and lighting. Handles common 2 to 4 conductor 14 AWG splices plus mixed 14/16 AWG taps. Use Red GB-6 instead for any 12 AWG combination or 10 AWG conductors.

Install: Strip about 5/8 inch of insulation from each conductor, hold the conductors parallel with the ends aligned, and twist the connector clockwise until tight. Pre-twisting solid copper conductors with linesman pliers before applying the connector is recommended on 12 AWG and 10 AWG splices where vibration is a concern (junction boxes near appliances, attic-mounted lights, garage-door openers). A finished splice should not pull apart under a firm tug, and no bare copper should show below the connector skirt.

Color code reference: WireGard color codes: GB-1 Gray (#22-#16), GB-2 Blue (#22-#16), GB-3 Orange (#22-#14), GB-4 Yellow (#18-#10), GB-6 Red (#18-#10). Always step up to the next size when in doubt - oversized connectors can spin loose, undersized connectors don't fully engage the spring.

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