Consultation on Differential and Thermal
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That's how the installation was, it's TP there is no TS. I do not understand how 2 wires of N and 2 of F enter and then bridle with 4mm cable but hey, it is Argentine .. I am going to doubt, how is the picture going to happen, leaving something like that? And if the ID were first and then the thermal?
Good morning elektomaq, I am doing a course of electricity and I know that the installation is wrong since it is old, the issue is that to rewire is to break everything and pass new pipe or do it outside because they are old pipes, but hey, the circuit breaker works yes. What I want if you can explain to me, is the difference between connecting a circuit breaker as general cut-off and thermal for circuits or thermal of general and circuit breaker for circuits. I have clear how the installation would be as a rule obviously. I ask why at some point an installation will touch me like that and I would like to explain
normatively speaking ... there is much more probability that there is a short circuit to the existence of an indirect contact between the first device (ITM) and the second (ID), so it is more advisable to place the thermomagnetic first. Of course, for this, it must be an installation that respects the standard
If the installation does not respect anything, it is the same as it is, in fact, many say "the ITM should be closer to the short" ... others say "the ITM should be as close as possible to the generator" ....
They are actually dodged, because they say it thinking that this prevents the
... Icc circulate through the ID. And they do not realize that if the short circuit is downstream of the ID, the Icc if or if it will circulate through the ID this before or after the ITM and the operating times of the ITM will be the same this before or after the ID
Going back to the regulation .... AEA says that, as long as the sectional circuit (s) maintain their double isolation condition, it is admitted that the IDs are in the sectional boards and is not required in the TP
In both the ITM if or if it must be present on the main board
What does this tell us?
First and foremost the ITM
now ... in your case where the cabinet is metal without pat with high risk of leaks and short circuits not only on the board but also throughout the installation, what you should keep in mind that this activity is regulated and you can not do what one
... wants to do what is necessary to make things look good and above all safe Because nothing could possibly happen, but if it happens, the owner will not say "no ... the electrician is not to blame, I was the one who does not let him do it" They are going to make the burden and they will accuse you of negligence professional!
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