Why current flows in nutral? As per theory there should be
no current in 3 ph explain.

Answer Posted / pravesh

in electrial system we can sy that neutral is the return
path of the elctivity as if there is any immbalance of the
supply or unbalanced load then some current flows through
the neutal , and if the system is balanced then only no
current flows through the neutral , in single phase supply
there is no current in neutral until there is disbalance
from incoming side or the equipment is faulty.

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