I hope you have missed something as 4 x 40 watt is only 0.7 amp and should not blow the smallest of fuse i.e. 1 amp. Either you have something faulty or you have missing something. If for example the are extra low voltage lamps then the inrush to the transformer could require a slightly bigger fuse. 2 amp are hard to find so 3 amp if with transformer and absolute limit is normally 5 amp as this is limit for most lamp fittings. I would wonder if in the past someone has fitted wrong size bulbs and damaged wiring. I think further investigation is called for.
thanks for the reply
i have just had a look in the spur unit to see if i missed anything and it does look like it has had a bit of burning or melting,
i have desided iam going to get someone in to change it over
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