Low voltage down lights and ceiling earth bar

**AndyD** · 07-Jul-11, 01:43 PM

Originally Posted by ColinK

Just to get back on the transformer subject that was discussed recently,

So any transformer inside the roof should be mounted due to heat etc etc etc,but what if its the new type 50W completely plastic transformers,surely theres no heat involved exept from the globe itself which obviously is the correct distance away from the transformer,should this transformer still be mounted???

Then another thing,what is this thing i hear where every property has to have a earth bar in the ceiling with a completely seperate earth to the board,is this true???

There's mixed views on whether a transformer should be mounted and there's good reasons for the arguments on both sides. I would decide on a case by case basis. If there's insulation material above the ceiling then I would mount them securely. Electronic transformers often produce less heat but they require good ventilation regardless.

It is regulations that an earth bar be installed for use by other services and you would normally provide the earth for the TV antenna from there.

All these requirements and more are contained in the SANS0142 codes which are available from here for R406.00.