Aug 18, 2026

Modular Switch Board Sizes: A Room-by-Room Guide

Overview

A modular switch board size list shows the module counts and dimensions available, from 1M and 2M up to 18M and beyond. Choosing the right size means counting what a room needs and leaving space to grow. This overview explains module sizes, real dimensions and how to plan the right board for every room.

Choosing a board size sounds simple until you stand in front of a wall with a dozen options. A clear modular switch board size list removes the guesswork by showing what each module count holds and how large the plate will be. With India’s electrical switches market growing at close to 8 percent a year, more homes are planning boards carefully rather than settling for whatever fits. This resource explains module sizes and real dimensions so you can plan the right board for every room.

How Module Sizes Work

Modular boards are measured in modules, written as 1M, 2M and upward, where one module is the space a single standard switch occupies. Understanding module size is the key to planning, because the plate you choose must hold every switch, socket and control the point needs. A modular switch board size is simply the total module count, so an 8M board has room for eight single modules or a mix of larger ones. Fybros offers a wide modular switch board size range to suit any room.

choose right modular board size for room

The Fybros Size List With Dimensions

The table below is a practical size list based on the Fybros Series 3 plates, with real dimensions. Sizes vary slightly by plate series, so treat these as a close guide. This makes it easy to picture how a 4 module switch board size or larger will look on the wall.

Module size	Approximate plate dimensions
1M and 2M	About 99.5 by 93 mm
3M	About 124.5 by 93 mm
4M	About 151.5 by 93 mm
6M	About 223.5 by 93 mm
8M	About 250.5 by 93 mm
12M	About 270 by 93 mm
18M	About 225 by 224 mm

The wooden Series 7 plates extend even further, up to 20M and 24M, for large walls that gather many controls in one place. Matching the module size to the wall keeps the board neat and balanced.

Choosing the Right Size for Each Room

Start by counting what a point needs, then add a spare module for the future. A 4 module switch board size suits a small bedroom point with a couple of switches and a socket. A 6M board fits most bedrooms and studies, while an 8M board handles busy living rooms with fan control and a television socket. Kitchens and utility walls often need 12M or larger. Reading a size list this way turns planning into a simple counting exercise.

Matching Size to the Box

A plate size only works if the box behind it matches. A modular switch board with box must use a metal or surface box of the same module count, so an 8M plate needs an 8M box. Fybros surface gang boxes and concealed boxes are sized to match the plate range exactly, which keeps the fit clean and the wiring safe. Checking the modular switch box size against the plate before installation avoids a poor fit later.

common modular switch board size mistakes

Common Mistakes to Avoid

A few simple errors trip up buyers. The most common is undersizing, where a board is chosen with no spare capacity and fills up the moment a new device arrives. Reading a modular switch board size with the future in mind, and leaving one spare module, prevents this. The opposite error is oversizing a point that only needs a couple of controls, which wastes both wall space and money.

Another mistake is ignoring how a mix of large and small modules affects the count. A socket or fan regulator can take two or three modules, so the real module size you need may be larger than a quick head count suggests. Planning each point on paper first, then matching it to the right modular switch board size, turns a confusing wall of options into a simple decision.

Key Takeaways

A modular switch board size list shows module counts and dimensions so you can plan the right board for each room.
Understand module size first, since the plate must hold every switch, socket and control the point needs.
A 4 module switch board size suits small points, 6M fits bedrooms, and 8M or larger suits living rooms.
The wooden Series 7 range extends the modular switch board size up to 24M for large walls.
Always match the plate to a modular switch board with a box of the same module count for a safe fit.

FAQs

1 .How do I read a modular switch board size list?

A size list shows each module count, such as 4M or 8M, alongside its plate dimensions. One module is the space a single switch occupies, so an 8M board holds eight single modules or a mix of larger ones. Count what a point needs, add a spare module, and pick the matching size.

2. What is the right modular switch board size for a bedroom?

For most bedrooms, a 6M board works well, giving room for a 2-way switch, a socket and perhaps a fan control. A small point may only need a 4 module switch board size, while a large bedroom benefits from 8M. Understanding module size helps you match the board to how the room is used.

3. Does the switch box need to match the board size?

Yes. A modular switch board with a box must use a box of the same module count, so an 8M plate needs an 8M box. Fybros sizes its concealed and surface boxes to match the plate range, so checking the modular switch box size against the plate keeps the fit clean and the wiring safe.

Plan the Right Size With Fybros

Getting the board size right is the difference between a neat wall and a cramped one, and Fybros makes it easy. With a full modular switch board size list from 1M to 24M and matching boxes for every plate, you can plan each room to its exact need and leave space to grow. Count carefully once, and every board fits and functions perfectly.

Not sure which size fits your room? Browse the Fybros plate range across the full size list and match it to the right box. Visit fybros.com or your nearest Fybros dealer for help choosing.