how to connect 240v/15a appliance

[Pointbock]

I helped a friend temporarily set her new convection wall oven in place this weekend. The new appliance is a Fagor convection oven, 240v/15a with what looks like a 12/3 SO cord out the back (no plug.)

The old oven was larger, and while the cabinetry gets sorted out, I just used the existing wire nuts to connect the new oven temporarily. This circuit is aluminum wired (6ga?) with a 30a breaker, and I'm wondering what the appropriate way is to make the new connection.

If I install a 20a receptacle in the box and use a 20a plug it would be more convenient to put the oven into its cramped (but properly ventilated) location. I'd also swap the 30a breaker for a 20.

What receptacle do I need (20a for relatively large Al wire) and am I correct in using 20a receptacles, breaker, etc. when the unit is rated right at 15a?

Thanks for any info

 

[mrb]

depends on what the appliance's instructions say as far as what size circuit to put it on. You can get a right angle plug to put on the cord if that will help with clearance issues. You arent going to find a 6-15 or 6-20 receptacle that is going to take #6 AL. You will have to pigtail to some #12 copper with the appropriate connector. They make a split bolt that has a piece in the center that creates a seperate compartment for each wire and is listed for AL to CU connections.

 

[nehog]

If aluminum wire, make 100% sure whatever outlet you get is rated for AL. Many today are not.

 

[sberry]

Most ovens in this class, this is generalization are allowed to be connected to 30A circuits, this is likely a 3.6kw unit? I forget the code sections, someone may remember?