the screws in the panel (holding the wires) are different sizes

[dave]

the aluminum stranded wires seem to be held in the 2 pole breakers (under the screws) with BIGGER headed screws.

ARE those bigger-headed screws ONLY for use to hold in aluminum wire?

this image should make clear what I'm talking about (an extreme closeup)

thanks for advise,

toolie

[RBM]

The bigger set screws are to hold bigger conductors. All the terminals are CU/AL

[metspitzer]

The larger screws are for holding larger wire. If you check, the holes will be larger. They are all for copper and aluminum.

[gfretwell]

No. I am guessing they are either bigger holes or they just used an old style screw when they lost the newer "3 ways". (slotted, phillips, robertson)

[Big_Jake]

I might be a little more concerned about what looks like a piece of zip cord running through your panel.

JK

[Stormin Mormon]

This wire is not here. You can not see this wire.

You need senstivity training. NO means NO! The course runs 26 weeks from 7 to 10 on Tuesday. Bring two forms of ID, and a note from your wife, if married.

[Sam E]

Your post is not here, considering that no one puts sigs in the wrong place.

[Tekkie®]

Big_Jake posted for all of us...

The zip tie is added extra!