Industrial production was seen growing 1.8 per cent from a year earlier in July, slower than June's 3.4 per cent increase, according to the median consensus in a poll of 31 economists.
"This is the time when mining remains weak because of monsoons, so it will not deliver a good number.
"Manufacturing is also expected to lag," said Upasna Bhardwaj, economist at ING Vysya Bank.
Data released on September 1 showed infrastructure output growth, which accounts for almost two-fifths of total factory activity, slowed to a three-month low of 2.7 per cent in July, dragged down by falling natural gas, steel and fertiliser production.
The July industrial output numbers, due on Friday, offer the first glimpse of economic growth in the third quarter. Between April-June, the Indian economy grew 5.7 per cent, the fastest in 2-1/2
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