The difference between residential and commercial electrical wiring can cause confusion. How different can it be? Why do I need to pay out for a commercial electrical contractor? The fact is that there are significant differences between the two. From the process of design to installation, and the laws that apply, it takes expert knowledge to complete commercial electrical installations. It requires expertise above and beyond residential electrical know-how. Here we are going to explain exactly how the two are different and why you need a professional commercial electrical contractor for your business installations.