4 AC still less than 60A (single phase max)

if 3 phase make sure the 4 A/C distributed among the 3 ; not just on single-phase... else its unbalanced....

even 4 ac on single phase no issue.. just make sure its DIRECT to MCB.. not to the existing wall switch/plug ... only use wall switch for 1hp and below...

My place kenot, AC already 8 most are 1.5 or 2 HP. Water heater also have 5 ady

Fridge don't take much power though.... less than 1kW for 2

lel.......as if you on everything at the same time.

when mcb trip you know you over load a circuit la

just recently upgrade, 3.5k

lel.....

layman burn means what?

if arcing causing melty plastic it is due to loose connection, not due to over load.

To change to 3 phase, basically two things need to be done..

1) apply to tnb. Tnb then will pull new 3 phase cabling from their source to your house tnb meter, then tnb will change to 3 phase meter. U need to pay some connection charges and additional meter deposit to tnb

2} your own electrical contractor works. Need to change the cable to 3 phase from tnb meter to your house DB box. Need to change the DB box to 3 phase type. Need to reconnect back all the wiring to the new DB box

recommend you to go for 3phase in this case. new ev chargers are 3 phase

how did you get 20a fish pump??