A few small questions :)

[malcolmsanford]

If you flip back a page and read the full first page of the appendix on diversity it states that the table is purely a guide and as such should be looked at as just that a guide .................

A ring final circuit is virtually impossible to apply diversity to as no one can say what will be plugged into them. You may get one house that as central heating and they just use a RFC for small electronic appliances, while next door has no CH and will have 3kw heaters plugged into it all over the ring.

IMO what is a good guide is the OSG section on A1 rings, if you stick to that guide, I think you will pretty much get a RFC right.

 

[mkoffulham]

Hi
was wondering if some one could point me in the right direction here!
my friend has a track light (the one with the wires across the room)12v that had a blown tranformer.
there is only 3 light on it 25w each. i had bought him a new transformer which is 150w so enough. it has a small glass fuse init.
for some reason the fuse keeps blowing after 5 minutes or so. it is controlled by a dimmer switch!
anyone heard or had something similar??
thanks mk

 

[Des 56]

Are you sure the transformer is a dimmable type

 

[malcolmsanford]

^^^^^^^^^^^
As Des says have you got a transformer that is dimmable?

 

[mkoffulham]

Hi i asked the shop where i bought it from and they say that it is dimmable but it needs an induction dimmer?
would a normal dimmer blow the fuse tho?? or could it be a problem with cabling. the mcbis not tripping when fuse blows!!

 

[malcolmsanford]

Normal dimmers that do the incadescent lamps very rarely deal with inductive loads ie transformers, flourescent, halogen lamps, so for your transformer you will need a dimmer that will dim the induction load.

 

[mkoffulham]

HI thanks malcom i got an induction dimmer and all was fine. now i know in the future. but how do normal dimmer dim spotlights with tranformers??