Modular switch or socket technical guide
GM Step Marker 3M - Warm White (AA 3 158 WW): technical guide
GM Step Marker 3M - Warm White (AA 3 158 WW) is a modular switch or socket from GM Modular. The GM step marker is a modular fitting with the latest LED lights. It consumes less energy and provides adequate light for your landscaping needs. Available in 3 options.
- Warranty: 2 years
- Model: AA 3 158 WW
- Modules: 3 M
Cons
- Modules usually fit only plates and boxes of the same range
Key specifications
As stated by the maker.
- Model
- AA 3 158 WW
- Modules
- 3 M
- Voltage
- 240V - 50-60HZ
- Warranty
- 2 years
- HSN Code
- 94054090
Warranty and validity
- Warranty
- 2 years (as stated by the maker)
How to use it
- Modular switches and sockets clip into a plate and a mounting box of the same range; each takes a stated number of modules.
- Match the current rating to the load: lights and fans run on lower-rated switches, while geysers, ACs and other heavy appliances need a higher-rated switch and socket on suitable wiring.
- Plan the plate size from the number of modules you need, counting blanks for a tidy layout.
Installation
- Have a licensed electrician fit it, with the supply switched off at the MCB.
- Use a mounting box and plate from the same range and module size, so the parts clip together properly.
- Tighten the terminal screws on the bare conductor only; loose terminals heat up and can melt the switch.
Care and maintenance
- Switch off the supply before cleaning, and wipe the plate with a dry or slightly damp cloth; never spray liquid onto it.
- Replace a switch or socket that sparks, buzzes, or feels warm to the touch.
- Keep heavy plugs out of a socket that is not rated for them.
Buying tips
- Buy switches, sockets, plates and boxes from one range, so the modules and finishes match.
- Check the current rating printed on each module against what you will plug or wire into it.
- Sockets with shutters keep children’s fingers and objects out of the live contacts.
Maker and compliance details
- Manufacturer / brand
- GM Modular
- Model code
- AA 3 158 WW
- HSN code
- 94054090
Compare with similar products
| Specification | | |||
|---|---|---|---|---|
| Price | from ₹653 | from ₹653 | from ₹655 | from ₹646 |
| Brand | GM Modular | GM Modular | Polycab | Legrand |
| Model | AA 3 158 WW | AA 3 158 WH | — | — |
| Modules | 3 M | 3 M | — | — |
| Voltage | 240V - 50-60HZ | 240V - 50-60HZ | — | — |
| Warranty | 2 years | 2 years | — | 10 years warranty provided by the manufacturer from date of purchase |
Values as each maker states them. “—” means the maker does not state it.
Frequently asked questions
The maker states: 2 years. Keep the invoice; warranty claims go through the maker.
Only if its current rating suits the appliance’s load and the wiring behind it does too. Heavy appliances need a higher-rated switch and socket; ask an electrician to check.
Modules fit plates and boxes of the same range and module size. A different range or brand usually does not clip in.
Product facts are from the maker’s published data; the use, fitting and care advice applies to modular switch or sockets in general. Last updated 9 November 2026.