How TO CALCULATE “Electric Input/Output and AC unit BTU “

One refrigeration ton is equal to 12000 BTUs per hour:

1 RT = 12000 BTU/hr.
One BTU per hour is equal to 8.33333×10^–⁵ refrigeration ton:
1 BTU/hr = 8.33333×10^–⁵ RT.

Nema configuration and voltage chart for general purpose plugs and receptacles.

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Terminology

Here is the distinction between plugs, receptacles, inlets and connectors.

	Flange or Box Mounted	Cord Mounted
Connected to live source of electricity (female)	receptacle – A female flange mounted wiring device with the conducting elements recessed behind the mating surface. Often referred to as an outlet. This type of device is normally wired to be live when nothing is plugged in to it. Therefore, receptacles are wired to the source of power.	connector – A female cord mounted wiring device with the conducting elements recessed behind the mating surface. This type of device is normally wired to be live when nothing is plugged in to it. Therefore, connectors are wired to the source of power.
Connected to load (male)	inlet – A male flange mounted wiring device with the conducting pins protruding and exposed. This type device should never be wired to make the exposed pins live while the mating device is unplugged.	plug – A male cord mounted wiring device with the conducting pins protruding and exposed. This type device should never be wired to make the exposed pins live while unplugged. Therefore, plugs are always dead until they are plugged into a power source such as a wall outlet or generator outlet.