Dear Vikram,
As per the VAT act we have to fulfil certain conditions to take VAT Credit (Bellow is extract of TNVAT ACT 19(2) You can refer your respective state.
Input tax credit shall be allowed for he purchase of goods made within the state from a registered dealer and which are for the purpose of :-
(i) re-sale by him within the state ; or
(ii) use as input in manufacturing process of goods in the state; or
(iii) use as containers, labels and other materials for packing of goods in the State; or
(iv) Use as Capital goods in the manufacture of taxable goods.
(v) Sale in the course of inter-State trade or commerce falling under sub section (1) and (2) of section 8 of the CST Act 1956.
(vi) Agency transactions by the principal within the state in the manner as may be prescribed.
If your transaction fall in the any of the above category you can take credit. Safety is extra or additional precautionary measure to prevent form fire or any other unfrozen act. This activity is not forming part of the manufacturing activity and not eligible for Input VAT Credit.
Hope the above explanation may helpful to you.