As mentioned in the previous article, a 2 gang switch is a switch enclosure that has 2 different switch lined side by side within the same mould. The 2 gang switch is made in such a way that even if one switch is faulty, the other still functions because they are not inter-related to each other. However the if one of the switch is faulty, the whole thing needs to be replaced as both the switches are embedded into the same casing it it is almost impossible to remove one and not break the whole casing. However, there are some brands that does allow people with the know how to dismantle and replace just the faulty switch. The cost won’t differ much though.
The advantages of using a 2 gang switch instead of using 2 separate switches is the space saving factor. As both the switches are made to fit into one casing, it would mean that we need only make provisions for space of one switch but get the convenience of using two. Another advantage of the 2 gang switch is that it looks a lot neater. If there are say, 6 switches lined up in a row, it would be better to have 3 pieces or 2 gang switch or 2 pieces of 3 gang switch.
The 2 gang and 3 gang switch also saves time and cost of materials for the installer or the electrician. The need to run extra wires and make extra openings to accommodate more switches will not be necessary. Maintenance wise, it cuts down time when there is a need to check for faults. Opening only one casing will let him see all the wires for both the switches inside the 2 gang switch. Fault finding will be made much easier.