What an electrical panel includes and how to compare offers

It is the metal box that protects everything else. Its size, the sheet thickness, the paint, the openings and whether it goes indoors or outdoors change the result a lot. In our plant we laser-cut the sheet and bend it ourselves, so the enclosure is made to fit the electrical room and not the other way round.

An assembled panel includes the busbars that distribute the current, the main breaker, the breakers for each circuit, the internal wiring, the connection terminals and the labelling of every circuit. Depending on the use, it can also carry consumption metering, extra protection, motor or pump control, or the transfer to the standby generator.

What defines all this is the design by the project’s electrical engineer: the single-line diagram and the load list. We assemble to that design.

The main panel, which takes the incoming supply and feeds the whole building; distribution panels, by area or by floor; meter enclosures, with one meter per unit in developments, towers and plazas; control panels, for pumps, motors and processes; and transfer switches, which move the load from the grid to the generator and back.

Does the offer include the enclosure or only the components? Is it tested and are the circuits labelled? Who installs and connects it? What warranty does it carry and how is it registered? Is there a maintenance plan? The answers make two offers comparable. Our quote is a clear price, with what it includes and the delivery time.

Every panel we assemble leaves with its QR-code plate. Scan it and you see the date and place of fabrication, the inspections and tests carried out, the warranty and its expiry, the use and care manual, the maintenance history and a button to request service. For an administration or a maintenance department, that stops paperwork from getting lost over the years.

Panels are designed to the electrical standards the project engineer applies, such as the NEC or IEC families. This guide does not replace that design: it helps you understand what you are buying and what to ask for.