About 2 years ago my electrician installed an EV charging outlet in my garage. He installed a SquareD D QO 50-amp breaker and ran about 25 feet of 6-gauge cable which terminated in a 14-50 outlet.
After considering options for quick and easy heat in the garage I would now like to also use that outlet for an electric heater. It would not be used to provide regular heat to the garage but would be for sporadic card nights and other man-cave purposes- probably 20 times a year.
I plan to use the following heater, as I have one available for only $140.00:
Dr. Heater Dr. Infrared DR-910M 10000-Watt 240-Volt Heavy-Duty Hardwired Shop Garage Heater
I plan to attach this this cable/plug (or something substantially similar) to the heater instead of hardwiring:
15Ft 50 Amp Extension Cord 250V 6/3+8/1 Gauge Heavy Duty Power Cord, NEMA 14-50P with Portable Handle
I have tried calling and texting the electrician to get his opinion if this all pairs up properly, but I have not heard back from him. He was an older gentleman I have used a few times and I hope all is well with him. I am normally not hesitant to hire out for my electrical jobs but it appears the only DYI task I would have to do is attach the cable to the heater.
I have also heard concerns about the risks of causing outlet damage by plugging and unplugging a 14-50 plug. I don’t want to use a simple pigtail that would leave open the risk of carelessly using both heater and charger at the same time, so I am considering this splitter if plugging and unplugging is ill-advised:
Lectron NEMA 14-50 Socket Splitter
Can anyone give me feedback as to whether the heater, breaker and cable/plug are compatible for my purpose, and if you think it would be wise to invest in the splitter I referenced?
Last thing- the cable is 4-wire and the heater has a 3-wire connection set-up. Would I just cap off the neutral in the cable?
Thank you very much in advance.