Answer / lokeshraj

A SYMMETRICAL SINGLE PHASE DISTRIBUTION OF THREE PHASE
POWER SUPPLY IS NOT PERFACTLY SYMMETRICAL. IT IS TOUGH TO
MAKE BALANCE THE LOAD ON A THREE PHASE DISTRIBUTION LINE.
THUS A CURRENT FLOWS THROUGH THE NEUTRAL LINE, THIS IS THE
REASON OF HEATING OF NEUTRAL LINE....

Answer / rajeev goyal

Unbalancing of system i.e. in 3 phase current unbalance due
to improper load distribution.

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