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Ground burial transformer, Black, 12 v ac, 20va, IP68



The T2504 ground burial 12v weatherproof wire-wound toroidal transformer is resin-potted into a black polycarbonate boxes. Each transformer has a self-resetting thermal cut-off to protect against overload, 1.2m mains input cable and 1.2m 12v output cable for connection using separate weatherproof junction boxes (cable & connections carrying different voltages must be segregated) suitable for ground burial.

Low voltage transformer loading example


The majority of exterior waterproof low voltage transformers are wire wound ( magnetic) torodial which are sealed in hard resin to prevent water ingress. The transformer must be loaded to 70% of it maximum capacity for it to function correctly. If you are going to put LED lamps on the transformer we recommend loading it to 80% of its maximum load capacity.

Transformer location and low voltage cabling

1.     Try and keep cable runs from transformers to garden light fittings as short as possible to ensure optimum performance, no
         more than two metres to the first lamp.

2.     Locate a transformer centrally amongst a group of garden lights it is to power; e.g. a radius of 8 metres for 50w lamps

3.     If you decide to run 2 sets of garden lights operated by separate switches, you must provide 2 separate transformers & circuits.

4.     Try not to put more than 12 lights on any one transformer otherwise voltage drop can reduce lamp and transformer performance.

5.     Try to avoid putting cable runs straight through the middle of the garden and try to run them along the fence line first, this will
        reduce the risk of putting a spade or fork through them when gardening.

6.     Where possible always try to keep the transformer above ground mounted on a fence post or spike, if you do have to bury them  make sure you use the burial    kits and fill with resin to reduce water ingress.

 

Colour/Finish
Black

IP rating
IP66

Construction
Wire wound (magnetic)transformer resin-potted into a black polycarbonate box, with a 1 m mains input cable and 60cm 12v low voltage cable

Input voltage
240v input

Installation
Connect 1 metre mains cable into a weatherproof junction box and 60cm low voltage cable with a T9963 joint kit

Colour/Finish
Black

IP rating
IP68

Construction
Wire wound toroidal transformer resin-potted into a black polycarbonate box

Input voltage
240v input

Installation
Make all connections in T9969 underground joint kit or similar resin-sealed joint. (Boxes with silicon-sealed lids do not protect against ingress of moisture through condensation and capillary action: ordinary silicon sealant does not bond reliably with all enclosure materials.) After burying the transformer and associated junction boxes, lay a paving slab or similar protective material over it, cover with cable warning tape and back-fill hole. NB: Where multiple ground burial transformers are to be installed in an area, allow connection points where possible above ground to allow for isolation in the event of future fault-finding. Connection of transformers to separate cores of a multicore cable may also be considered. Failure to adopt these recommendations may mean difficulty in fault diagnosis in the future and in extending or upgrading the system.