security flood light

[wannabesparky]

can anyone tell me if it is possible to install a security flood light coming from an upstairs ring main as a socket is close to where the light needs fitting but the occupant doesn't want any cables or anything showing outside or the decor disturbing inside in any way.
is it possible to put a fused spur next to the socket and come off that and if so what fuse would be used?
it is a 250w flood light

only just started to take up my college work again.
sensible answers only thank you.

 

[rocker]

Yep. Next!

 

[Deleted member 9648]

5a. Next!

 

[DurhamSparky]

simples!! ^^^^^^^^ do as they welsh man says! not as he does!

NEXT???


Tesco??

 

[SS87]

yes off the ring to a fused spur is alright, 3 amp fuse will cover the light

 

[wannabesparky]

yep i can do it or not?

 

[Izzy's Dad]

Hi yes what you're proposing to do is perfectly acceptable. I would use a switched fused spur. Use a 5 amp fuse to protect the cable!

 

[Deleted member 9648]

You can do it mate!!....go for it!!!!...and let there be light.

 

[wannabesparky]

what if it was a 500w flood light, is 5a still ok and what size cable from the fused spur

 

[DurhamSparky]

500 is still WELL within limit! 1mm and above

 

[rocker]

Mate, apply power law! C'mon!

 

[wannabesparky]

is that ok for a 500w flood light aswell

 

[DurhamSparky]

have you not asked that already!!??

 

[rocker]

500/230 = 2.17 could even get it on a 3A if you want, I'd go 5A though; plenty for cable (assume youll use .5mm flex or equiv?)

 

[SS87]

yea 500w is ok aswell. watts/volts = amps 500w/230v = 2.17a

 

[accordfire]

is that ok for a 500w flood light aswell

Someone not listening in here? Eh? Pardon? What?

Let's speak CLEARLY for the chap here........

Simple maths. Simple maths that you learn in the first few DAYS of any college course. You haven't studied for a while, OK, but come on, what have you been doing to forget even the basics? Are you honestly sure you should have that screwdriver anywhere near mains?

230VAC supply. 250 Watt fitting. Watts/Ohm's Law.... V x I = P voltage times current = Power, or in this case - you want to find current, so.... Power, divided by voltage = Current. 250/230 = 1.08A - 3A fuse.

230VAC Supply. 500W fitting. Same sum, off we go......

500/230 = 2.173913A, call it 2.18A = use a 5A fuse for longevity.

Not rocket science.