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Bus Bar Cable Installation

The Bus bar wiring is designed to provide the maximum amount of current to a specific point in the track, so the more spurs you have the less likely you are to get voltage drop. The wires (Positive & Negative) can be twisted together to reduce the amount of interference you get, some people think this does not works others don’t, so try it out.
The ideal solution is to have a 'ring main' so the far end comes back and is joined to themselves as close to the power source as possible. The drawing below shows a Base Board with the bus bars running around the entire board. The spurs are as often as needed and details of connection are shown below.


























Detail A. Connection of a Spur.
Type 1 Connection will still need a terminal block at the end of the spur to feed the equipment. (see detail C)

The main Bus bar wire is inserted into the clip so that it is in the rear through slot. The spur wire (yellow) is then inserted into the front through slot. Press down the metal cutter with a pair of pliers so the top of the metal is level with the plastic holder. Now fold over the plastic retainer until it clips to the body. Job Done. Repeat, this for the Brown wire, and all the spurs you require.





















Type 2 Connection can be used to wire equipment directly to it.
With this type of Distribution unit you will have to break into the two Bus Bar cables and connect them on the left and right.  The advantage of this unit is that you can wire the equipment directly into the terminals. Coming from the distribution unit you will use cable that is appropriate for the equipment, in most cases this will be 7/0.2mm or 16/0.2mm
























Detail C Terminal Connection
If you are using type 2 connection, you will not need the below circuit at the end of the spur.
This is just an example of the other end of the spur where you would have a terminal block, to run cables to different equipment in that area. The main wires would be from the spur which you would keep in 32/0.2mm gauge wire. The others can be run in the appropriate gauge wire for the equipment.


































Bus Bar Return
For best results connect the ends of the Bus Bar back to the main terminal at B. This creates a Ring Main so there is no long run of cable which could cause a voltage drop.














Fixing the Cable to the underside of the Baseboard.
There are a number of ways to fix your cables to the underside of your baseboard. The first one is a cable zip tie with a self-adhesive base, start with the zip tie at its maximum diameter so it’s easy to thread the cables. The second one is an aluminium clamp which you just bend over the wings when you have your cables in place. The third one, is my preferred solution. The P clamps are screwed to the baseboard where required and the cable is threaded through. If the P clamp is a large diameter you can add cables at a latter date, and remove cables easily when you have a change of layout.














Short Equipment Wires.
The equipment you purchase will normally have short wires (100 to 200mm long) which inevitably will not reach your spur end point. In some cases you will have to have a secondary terminal block to extend the wires, care should be taken here as getting the polarity wrong just became a lot easier. The proprietary manufactures do not all use the same colour coding for Live, Neutral, and Data.