6.2kw... that mighty powerful... too powerful for normal hdb...
using 13amp cable will work... but when u unwittingly over use the hob by turning 1 zone on too many... the cable will melt and cause a fire... that something not to joke with...
any electrician or contractors who recommended this setup odd to be shot...
there is plenty of induction hod out there like bosch 2 zone and brandt 2 zone that uses 15amp which is similar to our aircon...
even that if ur place have 2 aircon compressor and u on the 2 zone hob... u still risk tripping the house...