Safety Notice

12V Wired Products

Important safety warnings, installation guidance, and usage information for our 12V mains-powered wired lighting products.

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12v Mains-Powered Wired Lights and Components

This notice contains important safety warnings and other safe usage/installation information about the 12V wired lighting products we stock. Please read carefully and ensure you understand it before purchasing, installing, or using any of our 12V electrical products.

Our 12V wired lighting products are first and foremost a hobby product for adult miniaturists, designed to bring life and light to your dolls houses and 1:12 scale models. They do not run at the same voltage and are not manufactured to the same specifications as regular household lighting or electrical products. They are not designed to be used for long periods of time and should not be used as a supplementary source of lighting in your home.

MISUSE OF THESE PRODUCTS OR FAILURE TO FOLLOW THE SAFETY INSTRUCTIONS AND WARNINGS IN THIS SAFETY NOTICE COULD RESULT IN FIRE, ELECTRIC SHOCK, OR OTHER SERIOUS INJURY OR DAMAGE.

Safety Warnings

Read before use

General
  • NEVER LEAVE A LIT DOLLS HOUSE UNATTENDED.
  • None of our 12V electrical products are suitable for use by children under 14. Children over 14 should be supervised when using these products.
  • Never leave a child or vulnerable person unsupervised near a lit dolls house.
  • Do not leave 12V wired lighting systems lit for more than 1 hour at a time and allow all components to thoroughly cool (for at least 1 hour) by turning the transformer off and unplugging it.
  • Always use with a fuse-protected socket strip (maximum 1.6-amp fast fuse).
  • Do not allow people with reduced physical, sensory or mental capabilities to use electrical products unsupervised.
  • Do not allow people with lack of experience or knowledge to install a wiring system or rewire a plug without supervision.
  • Always switch the transformer off at the socket and unplug it from the mains after each use.
  • Always test each light (see TESTING below) before installation and after each modification.
  • Always read and follow any safety information printed on the packaging.
Transformers and bulb capacity
  • Check that the transformer is 12V and that the voltage on the rating label matches your mains voltage.
  • Do not operate the transformer from an extension lead — plug directly into a mains socket.
  • Never exceed the maximum bulb capacity of your transformer, socket/terminal strip, or fuse (contact us with the product codes if unsure).
  • Never touch the screws on the transformer or the connecting spades from the socket strip whilst the transformer is plugged in.
Damage and defects
  • A damaged light fitting or poorly wired plug can cause fire or electric shock — do not use the product if it has been dropped or appears damaged.
  • Always inspect the product for damage after unpacking and contact us if your new Minimum World product has any damage/defects.
  • Do not continue to use the light/component if in any doubt — switch off and unplug the transformer immediately.
Temperature and moisture
  • Some components may get hot during normal use — switch off and cool for a few minutes before handling.
  • Do not use in environments with extreme temperatures.
  • Do not use near heat sources such as radiators, gas/electric fires, or naked flames.
  • Do not expose to water or moisture. If you spill any liquid onto the product, switch off and unplug the entire wiring system immediately.
  • Do not touch any components with wet hands.
Maintenance
  • Ensure the transformer is unplugged before cleaning or modifying any elements (such as changing a bulb).
  • Do not use abrasive pads, chemical cleaning solutions, or any liquids on components in your lighting system.
Installation & usage
  • We strongly recommend using a "round-wire" system (see below for details).
  • Always test each light before installation, after each modification, and again after installation.
  • The wire insulation is thin — always fully uncoil each wire before use and avoid wires from other components touching.
  • Never install a light while it is plugged in.
  • Never change a bulb while the light is plugged in.
  • Plugs will often need to be removed and replaced during installation — ensure the two exposed wires do not touch at any point when rewiring.
  • The on/off switch on socket strips does not turn the system off completely — the transformer will continue to draw electricity while plugged in. Switch off at the mains and unplug when not in use.
  • All 12V products from Minimum World should be used on a fuse-protected system (maximum 1.6-amp fast-blow fuse) with a transformer at the appropriate voltage for your country.

Some other dolls house brands continue to use 2-amp fuses in their socket strips. While this has been deemed safe practice, we strongly urge switching to a lower amp fast-blow fuse for maximum safety.

We stock 1.5-amp fast-blow fuses compatible with most 12V terminal strips:

Wiring

Round-wire systems — the basics

A round-wire system comprises a central "hub" — a terminal strip (LT9017) with sockets, a fuse (max 1.6A fast fuse), and an on-off switch — which connects to a 12V transformer (LT9073) plugged into a mains socket. A 12V light with filament bulb is then plugged into this socket strip, either directly or via extension sockets.

The transformer should be sized according to the number of bulbs being fitted (not by the number of light fittings). It is acceptable to use a higher-rated transformer than required (a voltage regulator is recommended for fewer than ~5 bulbs in total), but do not exceed the recommended rating by adding more bulbs than specified. Our most popular transformer (LT9073) will run up to 32 bulbs.

The maximum bulb capacity of the socket strip and fuse may be less than the transformer's capacity. Our most popular socket strip (LT9017) with a 1.5A fast-fuse (LT9021) has a maximum capacity of 20 bulbs — including any lights plugged in via extension cords.

Mount the terminal socket strip near the bottom of the outside back wall of the dolls house using the adhesive tape on the back. Connect the lead-in wire to the transformer using the screw terminals. Never touch the screws or connecting spades whilst the transformer is plugged in.

Before installing any lights, temporarily plug them into the terminal strip (one at a time), switch on, and monitor for 10 minutes to confirm they're working correctly.

To remove and replace plugs during installation:

  • Remove the plug by holding it in one hand and using small pliers to pull out the pins. This frees the wires which were anchored by the pins.
  • Pass the wire out through the back wall of your dolls house (or to wherever the socket strip is located).
  • Replace the plug by reversing the method, ensuring the two exposed wires are not touching when you rewind them around the pins.

For more installation tips, see our How-To Guide: Wired Lights Guide.

Testing

Test each light

Always test each light individually before first use, after any modifications (such as changing a bulb or rewiring a plug), and again after final installation.

Keep notes of which light/component you have tested and when, so you can identify which element is causing a fault. Purchase spare fuses for your socket strip in case you blow any during testing.

Components may become "warm" when in use — this is normal. None of the components should become very hot (excluding the bulbs). Do not touch the bulbs during testing — they will be extremely hot.

If a bulb fails to illuminate during testing, gently tighten/reposition and try again. If the problem persists, replace the bulb. Always leave the light unplugged to cool for at least 10 minutes before tightening or replacing a bulb.

Contact

How to reach us

Please send queries or comments by email to info@minimumworld.com, by completing a Contact Us form, or by writing to:

Minimum World Ltd
Prospect House 2
Loddon Industrial Estate
Little Money Road
Loddon, Norwich
NR14 6JD
United Kingdom

Customer services: (+44)(0)1508 528950, 10am–3pm Monday–Friday (excluding public holidays).


This notice was last updated on 22nd April 2022.
Minimum World Ltd | Company No. 4508799 | UK VAT No. 847 1228 25