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Household Electricity

correct way to use cables in tray

agustinp

2.247

hace 6 años

Hi, I have a question about how to use the sintenax cable on a tray The case is as follows: feeding on one side, tray comes out and at the end the switch. between the board and the switch there are several luminaires the topic is: you should use 2 cables of 2x1.5mm2 splicing the neutral in the switch (wasting enough cable for a useless neutral take it twice the same route) or use 3x1.5 to carry phase, return and neutral but in turn making two joints? I present diagrams not to confuse [pic] in the second diagram starts with 2x1,5mm2, splices to 3x1,5mm2 and then again splices to 2x1,5mm2. I would go for the first but it is true that cable is wasted. What do you think? regards

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nastor

17.232

hace 6 años

Hello Agustin There must be a very good reason to go and return with the neutral to the switch box (such as a bypass or extra protection), otherwise it does not justify the first run you drew. regards

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agustinp

2.247

hace 6 años

Normally one built-in installation uses the second circuit, but I do not like to make so many joints with the subway, but the other one wastes cable. Always talking about a tray, then, what would be the right one?

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nastor

17.232

hace 6 años

Correct is not the word, but rather it is a personal choice; I would choose the second not to waste material, but as I said, that is in my opinion, both can be done.

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elektomaq

62.202

hace 6 años

Nastor
I said: the right way at my discretion. I did not say it wrong the other way. Both your opinion and mine are personal opinions but the safety does not go hand in hand with saving material ... I would not fill a tray of splices everywhere and described how I would avoid it (PERSONAL OPINION) I do not even say be the best option or be the most appropriate ..... each after choosing what suits you best

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nastor

17.232

hace 6 años

------ Nastor response box ----- or ----- Agustin said: Speaking always on tray, then, which one would be correct? ".
------ Nastor answers to Agustin: Correct is not the word, but it is a personal choice; would choose
------------ elektomaq, you do not have to be angry, nowhere do I make references to your sayings.
regards

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agustinp

2.247

hace 6 años

Hi, what I was looking for was to know if any of the two is incorrect, but as they tell me the two can be well then. I prefer to waste neutral but to have a whole cable since you have to take into account that each joint can fail and lead to short or leaks, but if it is in a tray it is a quilombo. regards

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elektomaq

62.202

hace 6 años

Then excuse me
Agustin:
The splices must be in boxes and cables with cable glands
Note that luminaires are not attached to the surface of the tray. There must be sufficient separation to not transfer the temperature to the tray

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elektomaq

62.202

hace 6 años



hace 6 años

Hello the correct way in my opinion is to waste cable. The most correct is the first scheme although it is not what I would do keep in mind that each splice goes one box what I would do is Place a box on the descent on the tray and all the splices there and from there reach each light with an entire cable remember that what is right does not always match what is convenient I upload a schematic of how I would do it:

regards

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agustinp

2.247

hace 6 años

I do not understand ... would not be the same as I raised in the first scheme? regards

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elektomaq

62.202

hace 6 años

Now I can not later you upload a drawing and you will understand

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elektomaq

62.202

hace 6 años

I uploaded the promised picture in my main message
any doubt comments
for a better understanding of the drawing, I omitted the protective conductor but you must have it present
are two protection conductors one for the tray and one for the loads
regards

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agustinp

2.247

hace 6 años

Well, to close the subject ... I'm still not clear if I did as elektomaq said or as the two options I detail, whichever you choose in my opinion are well or would not comply with the regulation? With this I close the subject. thanks for the diagram and the answers, regards

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elektomaq

62.202

hace 6 años

None of the options are expressly forbidden or not allowed by the regulation but to do it as you proposed, every place where a cable opens and splices you have to place box and cable glands. In the long run not to waste wastes boxes and cable glands and you will end up spending more money than placing a few meters more cable
So the waste of material is always because you can not leave the cables open and unprotected

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elektomaq

62.202

hace 6 años

The option that I propose you gain time. You simplify the work and clarify the circuit. (imagine a future repair goes someone has to be guessing and opening a lot of boxes), will be more esthetic with a single box that in itself is MANDATORY since to go down to the key you have to change system (from tray to pipe ) and there whether or by regulation goes the box. So the safest thing is that it is also cheaper than putting boxes everywhere and you will also gain time
regards

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