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Yellow twist-on wire connector in polypropylene housing

Buchanan

Buchanan WT4-1 Twist-On Wire Connector Yellow 10 AWG Polypropylene

SKU CH-M7PP-KDN42

Yellow twist-on connector joins copper wires up to 10 AWG at 600 V, rated 221 °F, UL listed and CSA certified

  • TypeElectrical Connectors
  • Connects up to five copper conductors securely
  • Rated for 600 volts maximum voltage
  • Withstands 221 degrees F operating temperature
  • CSA certified and UL listed for safety
  • Polypropylene insulation with V-2 flammability rating

Buchanan WT4-1 Wire Connector

The Buchanan WT4-1 is a yellow twist-on wire connector designed for copper conductors in electrical installations. It suits electricians, maintenance technicians and DIY users who need a reliable splice for residential or light commercial wiring. The polypropylene body provides insulation and flame resistance rated to UL 94 V-2. Certified to CSA and UL standards, it meets code requirements for general-purpose branch circuits.

10 AWG Maximum Single Wire

The critical specification is the maximum single wire size of 8 AWG and maximum combination of two 12 AWG conductors. This defines the upper limit of conductor gauge the connector can accept without compromising the mechanical grip or electrical contact. The zinc-plated steel spring inserts bite into copper strands across a range from three 20 AWG up to the stated maximums. Exceeding these limits will prevent proper insertion and may cause a loose connection.

Standard Twist-On Installation

The connector installs by hand with a simple twisting motion over stripped copper wires; no special crimp tool is required. Its polypropylene shell eliminates the need for separate tape or heat-shrink in many junction-box applications. The 600 V rating and 221 °F temperature limit allow use on standard lighting, receptacle and switch circuits. It does not accommodate aluminium conductors or wire gauges larger than 8 AWG single.

Highlights

  • Connects up to five copper conductors securely
  • Rated for 600 volts maximum voltage
  • Withstands 221 degrees F operating temperature
  • CSA certified and UL listed for safety
  • Polypropylene insulation with V-2 flammability rating

Specifications

TypeElectrical Connectors
BrandBUCHANAN

Questions about this item

What does the 10 AWG maximum rating mean when I am twisting wires together?

It sets the largest single solid or stranded copper conductor the connector can accept; anything larger than 10 AWG will not fit properly.

How does the 600 V and 221 °F rating limit the circuits I can use this on?

The connector is UL Listed and CSA Certified for circuits up to 600 V and environments up to 221 °F; exceeding either voids the listing.

Will the polypropylene shell fit inside a standard junction box without forcing it?

The standard twist-on style is sized for common box fill allowances; five conductors at the maximum 12 AWG combination stay within typical cubic-inch limits.

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