long runs 1.5mm to 1.0mm

[grandfortune]

Hi all,

got some sockets and lights to do in a hall, 25mtrs to first switch/socket and then various LED lights

would it be best to run from the mains to the switches in 1.5 and then all round to the lights in 1.0mm long runs to lights and hate terminating in 1.5

cheers
Grand

 

[davesparks]

What do your calculations say?

 

[GEOFF S]

Hi all,

got some sockets and lights to do in a hall, 25mtrs to first switch/socket and then various LED lights

would it be best to run from the mains to the switches in 1.5 and then all round to the lights in 1.0mm long runs to lights and hate terminating in 1.5

cheers
Grand

For Domestic i would run 1.5 to the switches and 1mm to the lights, i doubt voltdrop will be an issue. What about the sockests 2.5/4mm?

Cheers

 

[trev]

What Dave said.

 

[shanky887614]

why do you hate 1.5? lighting is easy to terminate

whats the vd going to be at the end of the run?

 

[trev]

i doubt voltdrop will be an issue.

And the only way of deciding that for certain is.......?

 

[grandfortune]

again is a commercial building small kitchen big halls, not alot of loading or insulation to worry about just longish runs, probably keep the 4.0mm to 4.0mm as there aint mush in it really

cheers
Grand

 

[trev]

Mate, ffs there's only one way to design a circuit and talking crap on an internet forum is not it.

 

[davesparks]

Not a lot of loading? Would you care to quantify that?

 

[shanky887614]

must be a windup, the vd calc is so simple and in the osg gives you all the info you need


there isnt a lot if loading in my kitchen, only 9 led spots (used to be 50watt gu10's)

i have put 50+ in one house before no problem

 

[ipf]

You said it trev.....and even thinking about 1mm for commercial...and long runs. Personally I hate 240mm....but only in tight confines.

 

[shanky887614]

You said it trev.....and even thinking about 1mm for commercial...and long runs. Personally I hate 240mm....but only in tight confines.

i know what your saying, we had a special order multicore control cable before.

we had to borrow some of these type of cable jacks and 4 guys to budge the drum

the cable itself was leight for its size but was a pain to pull in because of the bending radius etc

 

[baldsparkies]

For Domestic i would run 1.5 to the switches and 1mm to the lights, i doubt voltdrop will be an issue. What about the sockests 2.5/4mm?

Cheers

I always put a catch tray at the end of my cable runs.
That way if any voltage drops, it won't get lost and I can put it back later. :icon12:

 

[Pete999]

I concur with what both Dave and Trev had already said.

 

[GEOFF S]

And the only way of deciding that for certain is.......?

Hi all,

got some sockets and lights to do in a hall, 25mtrs to first switch/socket and then various LED lights

would it be best to run from the mains to the switches in 1.5 and then all round to the lights in 1.0mm long runs to lights and hate terminating in 1.5

Trev.the chap did not ask with regards to volt drop, so lets assume he knows, i made a statement based on experience, you will note DOUBT, not definitive, ill leave that up to him.

For Domestic i would run 1.5 to the switches and 1mm to the lights, i doubt voltdrop will be an issue. What about the sockests 2.5/4mm?

The onsite guide gives standard arrangements.

So given the fact that lighting circuits need to be broken up, and 1.5mm will happilly carry 30x100watt distributed loads over 50 meters, he stated 25 meters to the switch,this guy is fitting "various LED lights" do you think it will be an issue on a domestic, or even on a well designed comercial industrial.

Also you will find in the real world volt drop is far less than the APPROXIMATION method outlined in BS7671.

Cheers