Mandatory employer contribution if employee earning more than 15,000 basic?

If an employee is earning more than 15000 basic salary per mnth. And he contributing to epf ac @12% on 15000 ie 1800.
Whether it is mandatory for the employer to contribute in epf act for such employee.

Yes. Basically, PF contribution can't have only employee contribution alone.

We are a Central Govt. PSU going to engage contract labour for operation and annual maintenance of various electrical services in the office premises. We have applied for Principal Employer certificate also. We need to have two set of different contractors A & B having 12 & 4 workmen respectively. All the workmen will be new entrants to PF. As per the present minimum wages all their monthly wages are above Rs.15000/- We need to know:
(1) Since monthly wages is above Rs.15000/- whether they need to comply PF norms?
(2) In case a labourer works for about 20 days his monthly wages will be less than Rs.15000/- in which case whether the PF, PF admin & EDLI (both employer/ employee shares) are to be paid?
(3) Since the monthly wages are less than Rs.21000/- we hope that they need to comply ESI act, isn’t it?