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The transformers we supply are an electrical device which changes voltage; in garden lighting this is from mains voltage 230 volts to low voltage 12 volts. From the transformer to the garden lights low voltage cables typically through flower beds under lawns and even if desired under concrete structures such as pathways.
To avoid cable voltage drop (see Chart) to the garden lights, Identify the position of what you want to light and ensure you follow the chart for the maximum length of low voltage wire. If in the event that a transformer can only be situated in an area at the maximum length of the wire ensure you run any other lights within the same area on a separate low voltage wire, In many small urban gardens, roof terraces a typical garden lighting configuration may require one transformer on each side of the garden and perhaps one transformer to cover features at the far end of the garden.
Garden lighting transformers should all be weatherproof to IP55 or higher for surface mounting or IP68 for ground burial usage. Professional garden lighting transformers all include a thermal cut-off to protect the transformer against short circuits, though all circuits supplying transformers must be protected by a fuse or circuit breaker as well as an RCD.
The transformer size you will need is very easy to calculate simply add the number of bulbs and there wattage rating together and simply ensure that the transformer for that run of lights is at least five watts above that total.
Example
2x 50watt bulbs
3x35 watt bulbs
1x75 watt bulb
Total wattage = 280 watts
Thus for this installation you will require a 300watt transformer.
Please not that transformers generally come in the following wattage ratings 50watt, 100watt, 150watt, 200watt, 250watt, 300watt and 400watt. Much larger wattage producers can be found but after 300 watt the distance run from a transformer from our experience tends to be very sort.
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