Switchboard guides
Straight answers to the questions we hear every day — written by the people who build and test switchboards.
What is a QGBT (main low-voltage switchboard)?
A QGBT is the main low-voltage switchboard: the heart of the electrical distribution of a factory or building. What it does, what is inside and how it is custom-built.
Read the guide →Panel builder or electrician: which one do you need?
The panel builder manufactures the switchboard; the electrician installs and connects it on site. Understand the difference and how they work together.
Read the guide →How much does an electrical switchboard cost?
The price of an electrical switchboard depends on five factors: current, gear, enclosure, functions and testing. See what matters — and how to get a firm quote.
Read the guide →How is an electrical switchboard sized?
From the single-line diagram to the finished board: what gets sized (gear, busbars, enclosure), the spare capacity — and why we think about the project as a whole.
Read the guide →Types of electrical switchboards: which is which?
The types of low-voltage switchboards explained: main (QGBT), sub-boards, control, lighting, power-factor correction, changeover and automation panels. Where each one fits.
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