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Radial (Junction Box) Lighting wiring

Radial lighting wiring (also referred to as Junction Box lighting wiring) is normally found in older properties as this was the system used before the loop-in system became the preferred and quickest method of wiring a lighting system.

This page shows the wiring found at a ceiling rose of an installation using radial lighting wiring.

Note that the colours shown connected to the ceiling rose are the old standard - red, black and yellow and green, the modern standard being brown, blue and yellow and green (the yellow and green being the earth connector which is typically uninsulated but fitted with a yellow and green sleeving.)

5A. This wiring arrangement is as simple as it gets and shows that this is a junction box/radial system. If you have to remove the ceiling rose, simply connect your new fitting as shown 5B - live to live, neutral to neutral and where you have an earth cable, earth to earth.

radial lighting ceiling rose
Fig 5A
  radial lighting wiring
Fig 5B
wiring key for radial lighting

6A. This wiring arrangement for a radial lighting circuit with an extra live and an extra neutral would indicate that there are two lights in a room on the same switch. If you have to remove the ceiling rose, simply connect your new fitting as shown 6B - live to live, neutral to neutral and where you have an earth core, earth to earth. If your new fitting doesn't have an Earth core you must still ensure that the Earth cores present are joined together in the same terminal.

radial lighting ceiling rose for two lights
Fig 6A
radial lighting wiring for two lights
Fig 6B

 

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