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Copper compression lug, one hole, short barrel, green colour code

3M

3M 30027 One-Hole Compression Lug, 1 AWG, 5/16 in Stud, Short Barrel

SKU CH-2ZR1-3W1ZH

A one-hole copper compression lug for 1 AWG stranded wire with a 5/16 in stud, green colour code, die code 11, CSA certified and UL listed

  • Product typeElectrical Connectors
  • CSA Certified and UL Listed for code compliance
  • RoHS compliant materials meet environmental standards
  • Rated to 35 kV maximum voltage for high-voltage use
  • One-hole design with 5/16 in stud fits standard terminals
  • Short barrel crimps quickly with die code 11

1 AWG Copper Compression Lug

This 3M 30027 compression lug accepts a maximum of 1 AWG stranded copper wire. It is built from copper with a green colour code and die code 11. The barrel inside diameter is .35 in and the outside diameter is .46 in. The straight tongue measures .69 in wide.

Installers terminating 1 AWG copper to a 5/16

The one-hole design suits panels and equipment that provide a single 5/16 in mounting point. The short barrel keeps the overall length compact for tight enclosures. It is not suited for multi-hole mounting patterns or for conductors larger than 1 AWG.

Rated to 35 kV with UL and CSA certification

The lug meets UL Listed and CSA Certified standards for use up to 35 kV maximum voltage. It is RoHS compliant and uses a crimp termination style. The barrel dimensions and die code 11 determine the required tooling.

How it compares

Measured against everything we stock in Wire, Cable & Wiring Supplies, at today’s prices. Recalculated every night.

Price $73.99
Pricier than about 78% of the 1,610 comparable items (median $25.99).

Specifications

Product
Brand name3M
Product typeElectrical Connectors

Questions about this item

How do I crimp the 1 AWG copper wire into the short-barrel lug and what step is often missed?

Strip the conductor to the lug's barrel length, insert fully into the 0.35 in inside-diameter barrel, then crimp with a die code 11 tool; the step often missed is verifying the crimp with a go/no-go gauge before energising the 35 kV-rated connection.

What maintenance or replacement will the 3M 30027 lug need over time?

The copper lug itself is maintenance-free; inspect the crimp joint periodically for discolouration or loosening and replace the lug if the barrel shows corrosion, cracking or if the 0.46 in outside diameter has deformed.

What limit appears first when the lug runs continuously at high current?

The 35 kV insulation rating and the 0.35 in barrel inside diameter set the thermal limit; sustained current that raises the copper barrel temperature above its rated operating range will degrade the crimp before the lug body fails.

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