So I currently have a hard-wired 240V heater in my garage: Thought I don't use the heater often, I'd like to have the option to use it so my thought was I could have a 3-way switch that would switch on power to one or the other, never both. Is this possible?

The 240V heater is on a 30amp breaker and is rated for 30amps so I'm pretty sure the wiring from heater to panel is to code.

In the photo you can see there is a switch to optionally cut off power to the heater and I thought that this could be replaced with a 3-way switch that could either be off, power hard-wired heater, or power a 240V EVSE receptacle that would have to be branched off of the box. For the receptacle, I was thinking since my charger can be optioned with a NEMA 6-30 plug, that a NEMA 6-30 receptacle would be correct since there's only 3 wires from panel to heater (to my understanding a NEMA 14-30 would require a fourth wire to be run from panel to box).

So I currently have a hard-wired 240V heater in my garage: Though I don't use the heater often, I'd like to have the option to use it so my thought was I could have a 3-way switch that would switch on power to one or the other, never both. Is this possible?

The 240V heater is on a 30amp breaker and is rated for 30amps so I'm pretty sure the wiring from heater to panel is to code.

In the photo you can see there is a switch to optionally cut off power to the heater and I thought that this could be replaced with a 3-way switch that could either be off, power hard-wired heater, or power a 240V EVSE receptacle that would have to be branched off of the box. For the receptacle, I was thinking since my charger can be optioned with a NEMA 6-30 plug, that a NEMA 6-30 receptacle would be correct since there's only 3 wires from panel to heater (to my understanding a NEMA 14-30 would require a fourth wire to be run from panel to box).

So I currently have a hard-wired 240V heater in my garage: Thought I don't use the heater often, I'd like to have the option to use it so my thought was I could have a 3-way switch that would switch on power to one or the other, never both. Is this possible?
The 240V heater is on a 30amp breaker and is rated for 30amps so I'm pretty sure the wiring from heater to panel is to code.

In the photo you can see there is a switch to optionally cut off power to the heater and I thought that this could be replaced with a 3-way switch that could either be off, power hard-wired heater, or power a receptacle that would have to be branched off of the box. For the receptacle, I was thinking since my charger can be optioned with a NEMA 6-30 plug, that a NEMA 6-30 receptacle would be correct since there's only 3 wires from panel to heater (to my understanding a NEMA 14-30 would require a fourth wire to be run from panel to box).

So I currently have a hard-wired 240V heater in my garage: Thought I don't use the heater often, I'd like to have the option to use it so my thought was I could have a 3-way switch that would switch on power to one or the other, never both. Is this possible?

The 240V heater is on a 30amp breaker and is rated for 30amps so I'm pretty sure the wiring from heater to panel is to code.

In the photo you can see there is a switch to optionally cut off power to the heater and I thought that this could be replaced with a 3-way switch that could either be off, power hard-wired heater, or power a 240V EVSE receptacle that would have to be branched off of the box. For the receptacle, I was thinking since my charger can be optioned with a NEMA 6-30 plug, that a NEMA 6-30 receptacle would be correct since there's only 3 wires from panel to heater (to my understanding a NEMA 14-30 would require a fourth wire to be run from panel to box).