Just sharing my experience here...No intention to be sarcastic or what....

Based on my discussion with wiremen, most of the them are not certified or registered...If they are certified, they told me, they wont be doing such small jobs already like installing water heater and etc...

Yes, you are right..the money from those big jobs are lucrative...especially with factories, hotels and etc...

Charges is one thing, but do you know what kind of material are they using ?

Some quote u cheap but using questionable material...

Some quote u mahal but they used high quality industrial grade material..

It can be subjective...

Just sharing this as I have been dealing with wiremen for a while...

Before they quote I have told them the exact specific material I want ...

For ie, electrical wires ...ada different brand..I used one of the best brand in MY...

Then you need to tell them the size coz got 1.0mm, 1.5 mm and etc...smaller size is cheaper...

Then conduit piping...got High Impact one or not...

DB box or fuse box...guna plastic or metal...Metal is better....

Fuse ler, ada banyak jenis...

The list just goes on....

True also...big projects ada risk, as collection is an issue...Main contractor sometimes delay payment....unless you are dealing direct with the factory or hotel...

Small project like homeowner rennovation, easy to collect money..payment sure okay one as homeowner will not lari payment...

Heard of Hager ? There are also other renowned brands apart from Hager ...