A load not connected to ground but connected in a feedback
circuit is floating load
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One can not determine the total load that can be connected only
stating voltage and frequency. One must sum up the KW load of all
the devices to be connected, which gives the total connected load.
Then the power source system to be designed to cater to the that
connected load.
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If transformer then it refers to that, the primary is charged,
but secondary is open, (no load is connected)
If motor, it refers to that no load is connected to motor, the
shaft is decoupled from the load, but running with out any
load.
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No. Load resistance is the value of the element actually doing
the work of the circuit it is connected to. A speaker connected to
an amplifier is the load.