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[ETL Listed] Cable Matters 3-Pack 2 Prong to 3 Prong Outlet Adapter, White
Cable Matters

Cable Matters 3-Pack 2 Prong to 3 Prong Outlet Adapter, White

Bottom line: The Cable Matters 3-Pack 2 Prong to 3 Prong Outlet Adapter: ETL listed with a 15A/1875W rating for standard household loads; main trade-off: grounding only works if the outlet box itself is grounded.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

Pros & Cons

Pros

  • ✓ ETL listed with a 15A/1875W rating for standard household loads
  • ✓ 3-pack gives spares for a toolkit, laptop bag, or travel
  • ✓ Grounding clip ties to the faceplate screw to keep the ground path
  • ✓ Converts older 2-prong outlets to accept 3-prong grounded plugs

Cons

  • ✗ Grounding only works if the outlet box itself is grounded
  • ✗ Needs a screwdriver to attach the grounding clip
  • ✗ Fits polarized 2-prong outlets only
  • ✗ Pass-through adapter with no surge protection

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SpecPicks Verdict

SpecPicks scored Cable Matters 3-Pack 2 Prong to 3 Prong Outlet Adapter using a rating × review-volume × price-fit model applied to published specs and reviews across the accessories category. Cable Matters's accessories lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for accessories of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • 2 prong to 3 prong adapter connects a grounded electrical cord to an AC outlet without a grounding pin slot; Ideal solution for older houses or offices with AC outlets that do not accept grounded power cords
  • Two prong to three prong adapter converts a 3 prong grounded plug into a polarized 2 prong plug; Grounded protection is maintained by connecting the metal clip on the 2 to 3 prong outlet adapter to the middle screw on the faceplate of a grounded outlet box
  • Cost-Effective 3-Pack: This set of three 3-prong to 2-prong outlet adapters provides convenient spare adapters for your toolkit or laptop bag, making them ideal for travel or everyday use.
  • Simple installation of 2 to 3 prong adapter that plugs into any polarized 2 prong outlet; Simply attach the grounding clip to the screw on the outlet when installing
  • Sturdy & safe construction of this grounded outlet plug adapter includes a 15 Amp / 1875 Watt power rating, a grounding clip, and a rugged surface with easy grip treads for handling

Full Specifications

BrandCable Matters
ColorWhite
Plug TypeType B
Model Number400130-WHTx3-N
Input Voltage125 volts_of_alternating_current
Output Voltage125 volts_of_alternating_current
Item Dimensions1.7 x 1.6 x 1 inches
Mfr Part Number400130-WHTx3-N
Number of Items3
Number of Outlets3
Item dimensions L x W x H1.7 x 1.6 x 1 inches

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[ETL Listed] Cable Matters 3-Pack 2 Prong to 3 Prong Outlet Adapter, White is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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[ETL Listed] Cable Matters 3-Pack 2 Prong to 3 Prong Outlet Adapter, White
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