Modular 1 way switch with a red indicator, 10A or 20A 240 V AC, 1 or 2 module — ISI-marked to IS 3854; shows at a glance when the load is on.
- Red indicator window on the rocker — typically glows while the switch is on.
- Choose 10A (1 module) for lights and fans, or 20A (1 or 2 module) for geysers, ACs and pumps.
- Rated 240 V AC; ISI-marked to IS 3854, the Indian standard for household switches.
- The 20A versions have "20A" printed on the rocker, so the heavy-load switch is easy to tell apart.
- Comes with a wire lead for the indicator, usually connected to neutral.
- The 2 module version has a large square rocker that is easy to find and press.
- Clips into the base of a modular cover plate, one or two openings wide.
A switch with indicator is a 1 way on/off switch with a small lamp behind a red window in the rocker. Wired in the usual way, with its lead to the neutral, the lamp glows while the switch is on — useful for loads you cannot see from the switch, such as a geyser in the bathroom, a water pump or an outdoor light, and as a reminder to switch heavy loads off.
This listing has three versions. The 10A, 1 module switch suits lights, fans and small appliances. The 20A switches, in 1 module or a larger 2 module size, are for heavy loads — typically a geyser, AC, water pump or a 16A power socket. All of them clip into a modular cover plate and base on a concealed or surface box.
Which version do I need
- 10A, 1 module — lights, fans, TV and small appliances.
- 20A, 1 module — a geyser, AC, pump or 16A socket where board space is tight.
- 20A, 2 module — the same heavy loads, with a large rocker that is easy to find and press.
The switch rating must be at least the current the load draws — a 3 kW geyser draws about 13A — and the circuit must still be protected by a suitable MCB.
Where to use it
- Geysers and water heaters, where the red lamp reminds you it is on.
- Split and window AC points and heavy power sockets (20A).
- Water pumps controlled from inside the house (20A).
- Outdoor, porch, terrace and signboard lights that cannot be seen from the switch.
How to install
- Switch off the supply at the MCB and check that the wires are dead.
- Connect the incoming phase and the wire to the load to the switch terminals, as marked on the switch.
- Connect the indicator lead to the neutral in the box, as is usual for these switches.
- Clip the switch into the plate base, fit the plate and check that the lamp glows when the switch is on.
Electrical work should be done by a licensed electrician. Heavy loads such as geysers and ACs need their own circuit with a correctly sized cable and MCB.
Frequently asked questions
- What does the indicator on the switch show?
- It is a small lamp behind the red window. With its lead connected to neutral, it typically glows while the switch is on, so you can see that the geyser, pump or light it controls is powered.
- 10A or 20A — which do I need?
- Typically 10A for lights and fans, and 20A for a geyser, AC, water pump or a 16A power socket. A 3 kW geyser, for example, draws about 13A, so it needs the 20A switch. The rating must be at least the load current.
- 1 module or 2 module 20A switch?
- They carry the same rating. The 1 module switch saves space on a crowded board; the 2 module switch has a bigger rocker that is easier to find and press, which many people prefer for a geyser or AC.
- Does the indicator need a neutral wire?
- Yes. The lamp glows only when its lead is connected to neutral, so a neutral wire must be available in the switch box.
- Does a 20A switch protect my geyser or AC?
- No. A switch only turns the load on and off. The MCB in the distribution board protects the circuit and must suit the cable.
Buy modular switches with indicator online from Electric Market, Chennai. For site, contractor or bulk quantities, contact us for a quote.