Shout out when you see the issue! haha..

[1HVACOWNER]

The homeowner did not do this, but he is an electrical engineer and he saw it as soon as i did. He was not happy. Was a 2nd transformer installed to supply pwr for a zone system.

[Elfshadow]

What is that wedged in between the contactor and transformer preventing it from arcing??

[1HVACOWNER]

A piece of cardboard looked like the box the Transformer came in. Notice the red wires sticking up, the black ones were at the same height! 2 screws fixed the problem, Not hard.

[Rodney28334]

Dang I have been throwing away great electrical insulators!

[cehs]

Black and White Primary leads are for 120V.
It looks like the contactor is wired for 240V.....
.

[philjafo]

Well his first mistake was taking it out of the box duh, that's the whole reason they come in a cardboard box.