Portvoi 30A NEMA 10-30P to 14-50R/10-30R Y Splitter Adapter, 3ft — 8ft Grounded, 10AWG Copper

Portvoi's 30 Amp NEMA 10-30P Y splitter converts one older three-prong dryer outlet into two usable 240V sockets — a 14-50R and a 10-30R — so you can charge an EV or power an RV or dryer without rewiring.

If you still have a legacy three-prong 240V dryer receptacle and need to charge an EV or run a 50 Amp RV appliance, this adapter gives you a safe, temporary route to do so. The cable assembly splits the single 10-30P feed into a four-prong 14-50R and a second 10-30R output, and includes an 8-foot grounding lead to meet modern grounding needs when using the 14-50R. Built with heavy-duty copper conductors and a weather-resistant jacket, it is intended for alternating use of two devices from the same circuit — not simultaneous high-load operation.

How does the Portvoi splitter keep charging safe?

The adapter adds a dedicated grounding conductor for the 14-50R output and uses thick, 10 AWG copper conductors inside a flame-retardant jacket. It is ETL listed and designed for garage or outdoor use, reducing heat and wear under load when used as directed.

• 8-foot green ground wire with ring terminal for tying into a nearby outlet ground
• STW 10 AWG 100% copper conductors for lower resistance
• UV- and flame-retardant outer jacket for outdoor durability
• ETL listed housing and molded plugs for improved safety

Will this let me charge my EV or run my RV from an older dryer outlet?

Yes — when used correctly, the Y splitter lets you power Level 2 EV chargers (like Tesla and J1772-based units) and standard 30A RV loads by converting the single 10-30P feed into two separate receptacles. Remember that both outputs share the same upstream breaker, so you must not run high-draw devices on both simultaneously.

• Provides one NEMA 14-50R (50A 4-prong) and one NEMA 10-30R (30A 3-prong)
• Compatible with Tesla and J1772 EV charging equipment that accepts 14-50 input
• Allows alternating use of dryer, EV charger, or RV power without plug swapping
• Not for simultaneous full-load operation on both outputs

How easy is it to install and use this adapter?

Installation is plug-and-play — no electrician required for typical use. Plug the 10-30P into your dryer outlet, connect the ground wire ring terminal to a nearby grounded receptacle, then plug your EV charger or RV cord into the 14-50R or 10-30R as needed. The molded handle simplifies insertion and removal.

• 3-foot main assembly for tidy routing from wall outlet to adapter
• Handle on plugs for confident gripping and removal
• Ring-terminal ground lead plugs into a 15A or 20A household outlet ground
• No hardwiring or permanent rewiring required

What are the cable and build details I should know?

The splitter uses heavy-duty molded connectors, STW-rated 10 AWG copper wiring, and a resilient jacket suited for garage or outdoor settings. Its construction balances portability with durability so it holds up to repeated plugging and outdoor exposure when necessary.

• Molded 10-30P, 10-30R, and 14-50R connectors for secure mating
• STW 10 AWG wires for consistent current carrying capacity
• UV- and flame-retardant jacket resists sunlight and heat
• ETL listing confirms independent safety testing

Who is this for? The Portvoi 30 Amp NEMA 10-30P Y splitter is aimed at EV owners, RV travelers, and homeowners who still rely on a three-prong dryer outlet but want a temporary, practical way to power a Level 2 EV charger or a 50A RV inlet without costly panel changes. It suits users who understand shared-circuit limits and need a robust, portable adapter for garages, campsites, or short-term charging scenarios.