2 or 3 core SWA

[daviesrt]

I have read a few topics which have touched on this but wondering if anyone had a definate answer.
I am runing SWa for 1KW of outside lights. Should I run 3 core (live, neutral and earth) or 2core and relying on armour for earth.

 

[breezer]

if the cable is terminated in a metal box the armour is fine, not lighting a football pitch are you?

1 kw is a heck of a lot of lights

 

[daviesrt]

no no. one 500W halogen and 3 light fittings 100W each so 800W
based my calculations on 1000W to alow for one or two extra lights in the future.

 

[plugwash]

that depends, if its incandescent its one moderate sized theatre spotlight or two normal 500W halogen floodlights or ten 100W bulbs, in a large area thats not a great ammount.

now 1KW of high efficiancy lighting is another matter but high efficiancy lighting types have thier own problems. sodium is very slow to start, flourescent is fairly slow to start and doesn't like frequent on/off, LED is new and expensive.

 

[RF Lighting]

No, this is a heck of a lot of lighting

click here

 

[daviesrt]

just to check. I was intending to use 2.5mm SWA. Run is 60m. Voltage drop is around 5.5 so well within the limits

 

[breezer]

nah, thats a tiddly little thing.

see this

 

[RF Lighting]

The best I can offer is this.
Yep that really is a twelve thousand watt HMI discharge lamp

 

[Steve]

click here

Why would someone spend a grand on a bulb? Surely a few smaller ones would be more money-efficient???

1400 moving lights anyone?

 

[Pensdown]

I hope they weren't wired by the same guys wiring the coop stores. Just imagine, 1400 lights = 350 four way blocks

 

[Steve]

I hope they weren't wired by the same guys wiring the coop stores. Just imagine, 1400 lights = 350 four way blocks

heh. For that, you'd need 350 sockets though. If you used 467 4-way blocks, its possible to plug them all into one socket (provided the 13A fuses are replaced with those new fangled M8 fuses.)