James Abley wrote:

which I'm going to rip up and replace with the new flooring. I need to
re-do those wires, plus I guess stick in some sort of junction box so
that I can run a couple of lights up in the new loft along with a
switch by the loft hatch / ladder. I'm no electrician though. I've
previously installed a junction box to run a security light off the
front of the garage. That's the limit of my electrical experience:

Modern lighting circuits are usually wired using the "loop-in" method:

http://wiki.diyfaq.org.uk/index.php?...Loop-in_Wiring

Here each light position has a cable in, another to the switch, and
(unless its the last light on the circuit) another cable out to the next
light.

So adding more lights is really a case of taking a power feed from a
convenient light on the existing circuit and extending in the same way.
You can use a ceiling rose, the light fitting itself (if it has space
for the terminals) or a 4 terminal junction box to do the loop in wiring.


* What kit I need to add in the new lighting along with a light
switch?
* How do I ensure that I'm not overloading the circuit?

Check the circuit breaker rating. Chances are its 6A. That limits the
total power to just under 1400W. To assess the size of of the existing
circuit then count 100W (or the actual rating if larger) for each light
position and just add em up. Sounds like you probably have over 1200W spare!


--
Cheers,

John.

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