By law only licensed electricians are allowed to install switches in bathrooms in the UK.
For more information see:
shown below.
If you are adding the pull chain to an existing fixture then the pull chain switch should have two wires. Wire nut either one to the hot wire coming in and the other to the black wire of the fixture.
Normally the second switch in a bathroom is the control for the bathroom's exhaust fan. The exhaust fan removes bad odors and humidity from the bathroom, and is on the ceiling of the bathroom.
If it is a 2-wire switch- yes If it is a 3-wire switch- no
Bathroom (UK) = Badezimmer Bathroom (US) = Toilette, WC, Klo
Wire the switch to the hot/black lead.
You have a 3 way switch. Your black wire is the hot wire. Your green wire is the ground wire. Your red and white wires go to the light and other switch. You should have gotten a wiring diagram with your switch.
That's one I've never seen. Does the bathroom light turn ON when the bedroom light is switched Off? Does the bathroom light switch turn the bathroom light on and off normally when the bedroom light switch is left on? Need to answer these questions, then find where the bathroom light power comes from. It's power supply should either go directly from the power oanel to the bathroom light or to the bathroom light switch. The bathroom light switch merely acts as an interrupter for the hot leg of this power supply.
If you have any condition in your bathroom where a switch is malfunctioning you need to replace the switch or the device that is causing the problem. This is very dangerous in a bathroom because of the increased danger of shock because of moisture.
A switch is inserted in series with a single wire. When the switch is on, it is as if the wire had not been opened to insert the switch. When the switch is off the wire is open and no current can flow. All a double pole switch does is allows you to switch two separate wires at the same time with the same switch action. A single pole switch just switches one wire.
can i have an electric rocker switch in the bathroom
with a standard 1 pole light switch (one switch operating the light) it is black wire to black wire and white to white (non grounded)
If you have one wire into your switch box for your light. this is called a switch leg, the dimmer should be wired across the black and white wire wires.