There are different methods when connecting garden lighting with cables. We explore some methods below.
Firstly, when connecting outdoor lighting to the mains you must always use or consult a qualified electrician.
A simple way of setting a garden lighting system up is to get an electrician to run a swa armoured cable around your garden and to place double outdoor sockets is various locations. The armoured cable should be run back to a switch or remote control that will operate the circuit. The circuit must be RCD protected. Then you can plug in transformers or lights along the route to create your lighting scheme.
Mains garden lighting system
To connect lights you have several options and depending on the voltage there are certain recommendations. For 230v mains lighting systems, I would always recommend a junction box or high quality gel box. It should always be mounted above ground but if it is to be buried or left on the surface it must be resin/gel filled. Always use one gland per cable entry to ensure IP rating.
Extra low voltage garden lighting system
When it comes to connecting 12v or 24v systems you have a few options. You can use junction boxes or gel boxes but you can also use heatshrink and crimps.
Low voltage junction box method
When using junction boxes, from the 12v feed of your transformer you place a junction box then depending on the number of lights run individual cable runs to each light. To connect a number of lights this methods work really well.
Low voltage heatshrink method
Make off the supply cable end and light feed end. Place and slide a 15-20cm lenght of heatshrink tube down the supply cable. Then using either red, blue or yellow butt crimps (depending on cable size) connect the made off ends making sure the colours match. Then spread a couple of coats of quick drying liquid tape over the crimps and finally slide the heat shrunk ove the connection ensuring no made off cables are visible and heat till it has tightly wrapped around the connection and the seal around the cable is water tight. For me this is the best method and is quick and simple. Providing a great waterproof connection that is easy to hide and discrete.