Whenever you examine cable gland manufacturer or a light switch, the number of control points can it have? If it’s a double socket, it’s 2 gang, single socket is 1 gang. Same with a light switch, when it has one switch, it’s 1 gang, two switches, 2 gang etc.
This can be a term for the way the switch works. A 1 way switch simply breaks the circuit when thrown, it only has one live terminal. A 2 way switches the live connection from a terminal to a different, letting it be attached to another 2 way switch, controlling one light from two positions.
Double pole is really a safety feature on mains electrical control points that breaks the connection of both the live and neutral terminals giving complete isolation, permitting maintenance on high powered appliances.
An intermediate switch is perfect for when you need to manage an easy from three positions. Imagine you have a landing light that should be controlled from two ends from the landing and the base of the steps, the switch in the midst of this circuit could be an intermediate.
There is a lot more choice than the bog standard plastic flexible conduit fittings that adorn many a large number of walls over the land. Many metal finishes can be purchased, some of the more usual ones are;
Painted White Metal (in gloss or matt)
All metal finishes can be purchased in slim plate depths, from 5mm to super slim 1.5mm and with or without visible screws. It is worth noting these slim plates won’t easily fit in anything shallower than the usual 35mm deep backbox.
There are actually new UK regulations signing up to new build properties about the position of stainless steel flex conduit. All power sockets must be fitted a minimum of 450mm from the floor, while light switches cab1e be no greater than 1200mm from your floor. All points also must be a minimum of 350mm from your corner of a room. This really is to allow for ease of use by people that have a disability or wheelchair users. It is additionally advised the sockets should be placed around 100m from a working surface to permit sufficient room without causing problems for hanging flex.