[quote author=spongebob link=1106178796/0#0 date=1106178796] The lights/ transformers aren't pre-wired. Bearing in mind a max length of 500mm what size cable/flex should be used to wire lamp to transformer? [/quote]
The question is how you plan to run the cables to the transformers
Are you wiring one or more than one?
You could wire into the junction box and T off into the transformer, the cable from each transformer to light could be .5mm, or .75mm
.75mm would be the best option
Quote:The existing CU is of the re-wireable fuse type. As it's a bungalow the whole lighting circuit is protected by a single 5amp fuse. As far as I can tell, the total wattage of the bulbs served by this circuit is 1330W
At the moment then your total load is about 5.78A
Quote:Is this circuit up to the addition of five new downlighters or not
You can probably get away with another 5 downlighters, you can't upgrade the fuse to anymore than 6A unless your
entire circuit is all wired in 1.5mm, then you could upgrade to say 10A
One thing you should check is that all the Earthing is in place, e.g. main Earthing to gas and water, also supplementary bonding is in place.
Quote:What options are there if not? Would simply upgrading the existing re-wireable fuse be acceptable
Well re-wireable fuses only come in set values such as 5A, 15A, 30A etc
You cannot go over 5A for a lighting circuit unless you upgrade to MCB's
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