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NEMA 10-30P Male Plug to 10-30R and 14-50R Female Receptacle
30 Amp Dryer to EV RV Charger Adapter for Tesla Level 2 EV Charging and Dryer Power
No need to rewire, plug and play, only one outlet can power two devices, use only one device at a time to prevent circuit breaker trips
Cid
Reviewed in the United States on May 31, 2025
My neighbor is building an addition and so I gave it to him to use. No problems. If heavy equals quality then this thing is top notch and will last forever.
Michael
Reviewed in the United States on May 28, 2025
This splitter is wired correctly but is, of course, still technically incorrect, in the same sense that any other 14-30P to 14-50R adapter is also technically incorrect, because 14-50 plugs don't fit 14-30 receptacles for a reason – 14-30 offers 30 amps (~7.5 kW) max, while 14-50 offers 50 amps (~12.5 kW) max.But here, it could be quite reasonable of you to invoke the Yes I Am Sure I Know What I Am Doing™ exception.If your existing, installed 14-30 receptacle is in good condition, wired correctly and appropriately, with all connections at the specified torque, and connected to a modern electrical panel, then this seems like a perfectly reasonable way to share a dryer receptacle with an electric car's EVSE.EVSEs are almost always equipped with a 14-50 plug (despite needing only 240 volts, when a 14-50 offers both 240 and 120 volts) but most of them can be configured to command the car to always draw less than the 40 amp continuous draw that's permitted on equipment furnished with a 14-50 plug.The 3 hour rule says that any continuous load (defined as anything potentially operating for 3 hours or more) must not exceed 80% of the circuit's rated capacity, so this means your EVSE needs to be set for 24 amps or less, and then you should be good with an adapter like this.If you run the dryer while charging the car, that's an overload (technically, "overcurrent") condition, but that is what circuit breakers are for. If your circuit breakers don't protect your circuit against overcurrent, then you have a problem that goes well beyond using an adapter like this one.The conventional wisdom is that most 14-30 and 14-50 wall receptacles were never designed for frequent plugging in and unplugging. To the extent that this is true, using a splitter like this makes quite a bit of sense, so that you aren't adding unnecessary wear to your wall receptacle.To test this splitter for purposes of this review, I unplugged my EVSE from its usual 14-50 and plugged it in to the nearby 14-30 using this splitter cable, changed its max current setting down to 24 amps, and plugged in the car and let it charge. I verified the current draw was indeed 24 amps (it was actually 23.7 amps, but close enough; the EVSE tells the car the max current it can draw but does not actually control the charge rate – that's ultimately under the car's control) and then observed everything to ensure nothing was getting inappropriately warm (which could happen due to inadequate design or poor manufacturing) but no problems were found. It didn't heat up at all, which is exactly what should happen.
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