Will this work if im using a anti static wrist strap when repairing a

So i was thinking that i would connect it to the ground terminal of the outlet( I live in India so its the top one) but I'm scared of getting shocked bcz of a faulty ground point etc. So i was thinking if i take a 3 prong DC adapter(Its like 5V) that i have lying around, cut out the wire and insulate the other 2 wires and connect the strap and mat to it.
Will that work?