10 best 4-prong to 3-prong generator adapters of 2025

Categories Latest Plants & Flowers Blog Retail Coupons Deals

The 10 best 4-prong to 3-prong generator adapters of 2025

Updated: May, 03 2025

author

We independently review everything we recommend. When you buy through our links, we may earn a commission. As an Amazon Associate I earn from qualifying purchases. Learn more ›

Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.

If you're not a student, there's also a free 1-Month Amazon Prime trial available.

In this September 2025 review, we explore the 10 best 4-prong to 3-prong generator adapters options available. Our expert analysis, led by Adolph Green, ensures you find the perfect fit.

30 Amp to 4 Prong Generator Adapter Cord, Generator Transfer Switch Adapter Cord, NEMA TT-30P Male to L14-30R Female, Generator to House Adapter Cord, 30 Amp 10 Gauge STW

View on Amazon

best 4-prong to 3-prong generator adapters

30 Amp to 4 Prong Generator Adapter Cord, Generator Transfer Switch Adapter Cord, NEMA TT-30P Male to L14-30R Female, Generator to House Adapter Cord, 30 Amp 10 Gauge STW

4.8

View detail

view on amazon

30 AMP Generator Transfer Switch Adapter Cord, Heavy Duty STW 10 Gauge NEMA L5-30P Male to L14-30R Female, 3 Prong to 4 Prong Generator Adapter Plug Twist Lock to House Inlet Box,1.5FT

4.5

View detail

view on amazon

4 Prong to 3 Prong Generator Transfer Switch Adapter Cord, NEMA L5-30P to L14-30R, 30 Amp Generator Adapter Twist Lock STW 10 AWG

4.8

View detail

view on amazon

RVGUARD Generator Adapter Plug 3 Prong to 4 Prong, NEMA L5-30R to NEMA L14-30R Locking Adapter.

4.6

View detail

view on amazon

CircleCord NEMA L5-30P to L14-30R Adapter Cord, 4 to 3 Prong Generator Transfer Switch Adapter, 30 Amp Generator Twist Lock 3 to 4 Prong House Inlet Box, STW 10 AWG Blue

4.7

View detail

view on amazon

30 AMP Generator Transfer Switch Adapter Cord, Heavy Duty STW 10 Gauge NEMA TT-30P Male to L14-30R Female, 3 Prong to 4 Prong Generator Adapter Plug Twist Lock to House Inlet Box,1.5FT

4.9

View detail

view on amazon

ONETAK L5-30P to SS2-50R 1.5FT Right Angle 90 Degree 120V 30 Amp 3 Prong Male to 4 Prong Twist Lock Receptacle Generator RV Marine Shore Boat Power Cord Adapter

4.8

View detail

view on amazon

4 Prong Twist Lock to 3 Prong 30 Amp RV Generator Adapter Cord, NEMA L14-30P to TT-30R Adapter for Trailer Camper

4.8

View detail

view on amazon

Parkworld 884968 Generator Adapter, 30A Generator 3-Prong to 30A 4-Prong, L5-30P Male to L14-30R for Home Back Power Transfer Switch or House Panel (Compact Adapter)

4.6

View detail

view on amazon

ONETAK NEMA L14-30P to L6-30R 240V 30 Amp Twist Lock 4 Prong Male Plug to Twist Lock 3 Prong Female Outlet Receptacle Generator Welder Dryer EV Charger Power Cord Adapter

4.5

View detail

view on amazon

Adolph Green

contributing writer

I love helping people discover how to power their homes more efficiently. From small home improvement projects to large-scale generators, I’m passionate about sharing my knowledge of energy efficiency. I’m happy to answer questions about anything related to home or office energy conservation.