Search results for query: *

Yes a great help Bill - thanks. We have proposed the same to our customer. It is a very small amount of cable we are using, hopefully common sense will prevail. Johnny Johnny H-S BSc(Hons) MInstMC Engineers like to solve problems. If there are no problems handily available, they will create...

Thanks Bill, very useful. The situation is that we will be bending and installing in the UK here - ambient 20oC (in fact a little less - you may be familar with our summers!) - not a problem Its for when the system is placed on site where the already installed cable is subjected to -40oC...

Hello ladies and gents, Have had a search online and through suppliers for a SWA cable that can operate at -40 to 70oC. i can find non armoured cable that can do this but not armoured. (may just have to conduit/mechanically protect the non armoured) it is required for 230/50 2 Amps. 2.5mm2 3...

No steve unfortunately the two offers so far are duplex 2207 & 907L as "standard" - not offering to do a run for 2 off. 6 MO is the sample system standard so good shout for that material but not avail. It seems to be the small duty and the special materials. The lower duty grundfos pump is...

Hello lovely Engineering Community! I have an issue regarding a pump that is required for an offshore application (north sea). I'll try and give all the info but keeping it brief to still keep your interest!! Basically it is for supplying sample (5 litres a min required at 5 bar head) to...

Ok guys as promised my Heating and Ventilation unit has been tested and the results are in.................. To remind you i needed at least 12 air changes with an overpressure in my room (GRP house) of 50PA. I have an HV unit external to the room which supplies the (sometimes warm depending...

Hurrah! I have got my paws on some guidance notes and it states for the prospective fault current(Ipf) section that a) this figure is to be acquired by enquiry or by measurement and b) The maximum prospective fault current recorded should be the greater of either the short circuit current...

you get a star for that last post! lol! anyone else?! Johnny H-S BSc(Hons) MInstMC Engineers like to solve problems. If there are no problems handily available, they will create their own problems.

thanks you for your reply rbulsara! unfortunately i cannot leave this job for the sparkies! Please have a look at this forum. It looks like they actually measure for the prospective fault current - any comments? In any case could you please tell me the formula for calculating it? In theory i...

http://blog.sparksdirect.co.uk/rcd-residual-current-device-principle-of-operation-rcd-rccb-rcbo-cbr-srcd/ rather than type out this is what i have found useful. i believe it is rarer to find just a Earth Fault protection relay more likely to have it included in a Residual Current Operated...

Hi guys, I’m generating the company forms for the electrical installation certificate schedule of test results to the 17th Edition BS7671:2008 and have the following questions/statements that you fine sparkies may confirm/clarify for me... The Prospective Fault Current This was measured by a...

Dear All, I am in a bit of a quandary. :-( I need to remove water from a flowing hydrocarbon stream but all the usual suppliers cant seem to do it due to the amount of water and flow rate required from the clean outlet. (Pall, Parker etc) Process: Stabilised Condensate Process Temperature...

Hi Guys Thanks for your inputs. great stuff! After a little digestion and reading your comments what do you think of putting the Neddle Valve always downstream on the Flowmeter for both liquid and gas. My thinking being this: if the needle valve affects the state (phase) of the medium being...

Ladies and Gentlemen of the engineering community your input please! I have a flowmeter (variable area) and am deciding where to put the needle valve to regulate the flow for a) the sample line and b) water cooing line. I have had discussions with various engineers with some recommending pre...

hmmm that sounds plausible! Thanks for answering IFRs how do i do that?! ie what would i type in the template file? I am just looking to have the file location within the template Thanks :-) Johnny H-S BSc(Hons) MInstMC Engineers like to solve problems. If there are no problems handily...

Hello you beautiful helpful people. May be (hopefully!) a really quick question here. I would like to have a file location field inserted in my title block (initial template with company and rev numbers etc on it used for all new dwgs) so that when that template is used in a project and filed...

BINGO! (and who doesnt love BINGO!) http://www.toolstation.com/shop/Electrical/Circuit+Protection/GE+RCBO+10A+30mA+Type+C/d190/sd2615/p17137 http://www.hbo.com/larrydavid/episode/season5/episode44.html :-) Johnny H-S BSc(Hons) MInstMC Engineers like to solve problems. If there are no...

Kiribanda, Thanks for your help. in particular you have opened my eyes to the actual function of the ELCB. I thought that it did the overload protection AND earth leakage. I was wrong and your last post made me investigate further.. Fellow Viewers...

ok thanks for the replies guys. bit more information. 1) The system is going into a Romanian Refinery. The specifications as to what is acceptable is very vague from the client but we are under obligations to supply a functioning safe system under our (UK) specifications (statute and good...

Good Morning All! you guys are usually so helpful so i'd thought i'd put this little poser for you electricals to lap up. Am sure this is bread and butter for y'all but for a mechanical process guy its made me think twice as well as a few guys around here and i would like to consult your...