Building has a 3 phase supply in from street. A room in the building draws from one of the phases of this 3 phase supply. Room needs to be seperately metered.
My understanding of what spark wants to do is he wants to tee off one of phases into meter then to seperate fuse/RCD box for the room.
Is that pretty much how it should be done?
Fair enough - but are you talking about 'private' metering (downstream of a 3-phase meter covering the whole installation), or are you talking about having a totally separate metered supply for the one room? If the latter, it would be a supplier and/or DNO you would need to be talking to, not an electrician.
Kind Regards, John
Installing a meter on one circuit for monitoring purposes is perfectly good and very commonplace. In large plantrooms it is common practice to meter any device over say 5KW.
In that case, you just need to insert the 'private' (single phase) meter in the feed (of one phase) from the main (presumably 3-phase) meter to the room in question.
Kind Regards, John
As a practising electrician I find the notion of getting a spark to look at a job and posting here to ask DIYERS to confirm his proposal is a bit bizarre.
Before you jump down my throat John, I'm not challenging your response.
I essentially agree. However, I would point out that, although it obviously doesn't necessarily always work like this (and didn't on this occasion), I think the idea of this forum is so that DIYers, or other non-electricians, can ask questions and get responses primarily from electricians. If taht were not the case, it really would be a case of 'the blind leading the blind'!.
You may not disagree with the content of my response, but you are presumably critical of the fact that I (or anyone else) had responded to the questions at all. However, that won't make me 'jump down your throat'
Kind Regards, John
I'm not at all critical of you responding. I just find it odd to start with an electrician proposing a design and getting it verified in here. I would also say that the vast majority of posts in here are by diyers.I essentially agree. However, I would point out that, although it obviously doesn't necessarily always work like this (and didn't on this occasion), I think the idea of this forum is so that DIYers, or other non-electricians, can ask questions and get responses primarily from electricians. If taht were not the case, it really would be a case of 'the blind leading the blind'!.
You may not disagree with the content of my response, but you are presumably critical of the fact that I (or anyone else) had responded to the questions at all. However, that won't make me 'jump down your throat'
Kind Regards, John
It is odd, and it's sad that it is ever 'necessary'.
However, unfortunate though it may be, it's not all that unusual to see people here being advised to seek a different electrician, because of the advice/proposals they have received from the 'electrician' they have consulted.
Kind Regards, John
I don't think this was the format of OP, however I see nothing wrong with a fully qualifed and competant person proposing some work and consulting with other professionals as to the suitability or best options. I actually welcome such 'brain storming' sessions for mutual learning.