Joshi, under EPF, if you have capped the wages to Rs 15,000, that is the PF qualifying salary. If the employee has taken 5 days LOP, proportionate deduction for the purpose of PF contribution should be done from Rs 15,000. Hence, the PF deduction would be on Rs 12,500, i.e., Rs 1,500.
For PF coverage, it is not mandatory that his salary should be Rs 15,000 or less than that. A company that believes in such social legislation shall cover all employees irrespective of their salary. The only thing is that those who are drawing more than Rs 15,000, the Pension Contribution shall be restricted to 8.33% of Rs 15,000. (This has been declared unconstitutional by Kerala High Court).
In respect of a newly joined employee also, there is no issue for coverage provided he is not covered under the pension scheme. In such cases, the entire contribution payable by the employer shall be deposited into his PF rather than bifurcating it as 8.33% to the pension fund and the balance to the provident fund.