Dual earth terminals for computer circuits

[brizospark]

Noticed this on the architects notes can someone elaborate for me? thanks

the contractor should note the need for dual earth terminal blocks to be provided within DBs supplying computer power

 

[Knobhead]

Stick me in front of large motor control gear and I'd have to go into BS mode and I don't mean 7671!

Stick me in front of a modern CU and I look confused, give me the MCC anytime. Don’t get me wrong I’d soon suss it out but it’s foreign territory to me!

Until I came on to this board I didn’t even know a MCBO existed.

 

[ezzzekiel]

Well they should have because it is not "that" new, if they want to be classed as professionals then they must act as such.
Sorry my opinion stands, if the OP does not know then back off and get someone who does.

In which case dont bother replying to the thread - your comments are neither useful or wanted

 

[Silly Sausage]

Well they should have because it is not "that" new, if they want to be classed as professionals then they must act as such.
Sorry my opinion stands, if the OP does not know then back off and get someone who does.

If I had a tenth of this guy's knowledge I'd be a $£%&ing electrical genius.

 

[telectrix]

i did 16th in 1995 and no mention was made of hi integrity earthing then. it was only in 1998 when working in factory offices that i came across it, and that was after 25 years in the trade. as i said before, if you ain't met it, you don't know.

 

[SW1970]

I first came across them in 1988 in a telco lab environment.

 

[Des 56]

I first came across them in 1988 in a telco lab environment.

I came across them on a David Attenborogh documentary before then

,it was called Earth connections or something similar,they were a very rare species indeed

 

[oxocube]

Noticed this on the architects notes can someone elaborate for me? thanks

the contractor should note the need for dual earth terminal blocks to be provided within DBs supplying computer power

People have assumed (as I did at first) that this is referring to high integrity (HI) earthing.

Just dawned on me, it could also mean they want clean and dirty earth bars, and possibly (HI) earthing.

I would seek clarification, because getting this wrong could be very expensive.

 

[Simlec]

Yes indeed double check that they do not require clean earth, but i would have said, architect would/should have stated that they require clean earth (not a small detail) on circuit(s), but then again he/she could of over looked.

 

[Engineer54]

People have assumed (as I did at first) that this is referring to high integrity (HI) earthing.

Just dawned on me, it could also mean they want clean and dirty earth bars, and possibly (HI) earthing.

I would seek clarification, because getting this wrong could be very expensive.

Just read this thread from the beginning, and that was my first assumption, a clean and a standard earth bar. After reading the numerous post replies, i thought that i was mistaken, and had misread the OP's post. ...lol!!

 

[Engineer54]

Yes indeed double check that they do not require clean earth, but i would have said, architect would/should have stated that they require clean earth (not a small detail) on circuit(s), but then again he/she could of over looked.

This would be quite easy to determine, ..by checking drawings, ...Clean earths requirements are always quite clearly marked on main and sub-main distribution DBs and Panel drawings...

 

[Knobhead]

In which case dont bother replying to the thread - your comments are neither useful or wanted

After a comment like that your opinions are reduced like you to NOTHING!

NBP is one of the most skilled engineers on this board. one who’s advise I’d take any time over yours.

 

[jeremy]

The op asks about dual earthing in the db, not at the sockets, the socket being where I thought the HI earthing had to be dealt with. Have I missed something or is the architect asking for something above and beyond BS7671?

 

[Simlec]

With HI earthing, you also split earths at DB of that circuit, which can be done with same earth bar or separate bars.

 

[Engineer54]

The OP doesn't know what the requirement is, and why he posted his query. Which is also why he has been told to seek clarification as to what the specification note is referring too ....clean and standard earth bars or HI dual earth bars!!

 

[ezzzekiel]

After a comment like that your opinions are reduced like you to NOTHING!

NBP is one of the most skilled engineers on this board. one who’s advise I’d take any time over yours.

yeah whatever you say - lol