Which of the following terms is synonymous with 'phase to phase'?

The term synonymous with 'phase to phase' is 'cross connection.' In electrical systems, especially in three-phase systems, phase to phase refers to the connection between different phases, as opposed to phase to ground or neutral. This cross connection facilitates the transfer of power between the phases, allowing for balanced load distribution and efficient operation of electrical equipment.

Other terms provided, while relevant in their own right, do not convey the correct meaning associated with 'phase to phase.' For example, a short circuit refers to an unintended path of low resistance that can cause excessive current flow, leading to potential damage or hazards. Overload bias relates to a condition where current exceeds the circuit's rated capacity, creating a risk of overheating or failure. A series circuit describes a configuration in which components are connected end-to-end, providing a single path for the current, which is different from the concept of phase interactions in three-phase systems. Each of these terms highlights different aspects of electrical operations but does not match the specific clarity of 'cross connection' in relation to phase to phase connectivity.