Thought it might be interesting to show a Pittsburgh machine in action. This machine is used to join two pieces of sheet metal together in ductwork. It creates a pocket with an extended straight flange. A second piece of sheet metal with a standing flange of 1/4" is inserted into the pocket and the extended straight flange is then hammered over to create a pressure class joint. This is very useful in creating longitudinal joints that make up rectangular ductwork and plenums.
Well it is called a squirrel cage.
This has got to be like the worst carnival ride ever!
We have a slight problem!!!
There are several things going on here that are wrong. Firstly at some point someone bypassed the disconnect. Either the disconnect burnt up or the stab was missing but whatever the reason, at that point the disconnect should have been replaced. Doing this leaves absolutely no local means of disconnecting electricity to the equipment for purposes of safety servicing and/or repairing and is against local code. BELIEVE IT OR NOT POWER IS STILL BEING SUPPLIED TO THIS EQUIPMENT AS THE BREAKER HAS NOT YET TRIPPED!
Second the person or persons that bypassed the disconnect used red wire nuts to connect the wires within this now compromised enclose. NO WIRE NUT should ever have been used in such a high current connection as this but rather a properly rated terminal block or better yet split bolts.
Third the thermostat wire is ran along with the hight voltage wire in the same conduit. Not only is this a nono for multiple reasons but now the thermostat wire also is compromised.
What needs to happen now is the breaker needs to be checked and/or replaced because it didn't trip, the disconnect needs to be replaced, the high voltage wire needs to be replaced both entering and leaving the disconnect, the flexible conduit needs to be replaced as does the thermostat wire. Also I've got a running diagnostic to perform which may turn up other failures that happened as a result of high voltage being fed through the low voltage circuit. Things such as overcurrent protection devices, transformer and circuit boards may to be compromised by this failure.