Help/Advice with Long cable runs in garden

[Taylortwocities]

Just wondering about the floodlights. Are these LED, halogen or something else?

 

[pc1966]

Just wondering about the floodlights. Are these LED, halogen or something else?

I would imagine LED these days!

 

[Taylortwocities]

I would imagine LED these days!

Me too, but you never know. I saw 400watts snd wondered …

 

[pc1966]

If you were prepared to allow a 5% drop, it might just about permit 6mm2.

As far as I know, the 3% drop for lights was to avoid unpleasant variations in brightness as other lights are switched on the circuit, probably not so big an issue now with LED as they have less change in brightness versus voltage than filament.

However, if all lights are switch simultaneously then no such interactions and 5% might make for a far cheaper job.

But also check the surge from simultaneously switching them. Some companies give to limits for this in terms of MCB rating, also check the de-rating needed for any relay or contactor.

You can reduce the surge slightly by using a zero-crossing SSR, but do remember that such devices cannot be used for isolation, only for functional switching.

 

[davesparks]

As far as I know, the 3% drop for lights was to avoid unpleasant variations in brightness as other lights are switched on the circuit,

The 3% and 5% volt drop limits are there to be used in the absence of knowing tge specific tolerances of the equipment being installed.

 

[davesparks]

I did think about switch at main house but if we go down there route of fuseboard by the tennis court the double socket would only work when switch locally is on.

The double socket was only a suggestion.

This could still be done relatively easily with a 4 core cable.

 

[Sparky28]

Just wondering about the floodlights. Are these LED, halogen or something else?

LED

 

[davesparks]

Customer had ask if they can control it through there phone or app

You'd think a physical switch would be more suitable wouldn't you? But I guess if you can afford a tennis court and have enough land for it to be 250m away from your house it's probably against the rules to have something as basic as a normal switch.

 

[pc1966]

The 3% and 5% volt drop limits are there to be used in the absence of knowing tge specific tolerances of the equipment being installed.

Hmm, that does not seem to fit given the ESCQR allows +10% / -6% on suooly voltage and so any equipment ought to cope with that?