tables | Page 2

tables

Recent contents View information Top users
  1. Z

    Learner query on resistance tables for copper conductors and resistivity

    Hi everyone Table A.1 in Guidance Note 3 shows various values of resistance/metre for copper conductors at ambient temperature, including e.g: 18.10 milliohms/metre for one 1mm sq. conductor 0.387 milliohms/metre for one 50mm sq. conductor But these given values of resistance do not exactly...
  2. T

    Zs and SWA csa tables

    I thought these tables may be of interest to some of you testing people
  3. C

    3 phase voltage drop tables

    If you have a 50A 3 phase MCB, that's 50 per phase - when calculating voltage drop using the tables do you calculate using 50A or 150A? ie 10mm cable carrying 50A 3 phase over 30m VD=3.8x50x30 / 1000 = 5.7V or VD=3.8x150x30 / 1000 = 17.1V I think it has to be the first but am a bit mixed...
  4. B

    Volt Drop

    This is a 2391 question DURING THE COURSE OF AN INSPECTION ONE OF THE SINGLE PHASE RADIALS supplying an item of fixed equipment is to be checked for volt drop. 45A full load, 80m length, 10mm singles,70 degree thermo singles, steel conduit, mohms/m at 20 degrees=1.83(p166 OSG)...
  5. J

    understanding tables in OSG and 17th regs book???

    hello just taken my Am2 exams last week and past everything apart from the 30 question online exam. I have booked myself in for a resit of the questions for next friday. questions like... 50mm by 50mm metal trunking fixed horizontally over 20m, how many fixings would it need? that...
  6. G

    Bonding commercial kitchens

    I'm working in a new build school kitchen at the moment and am bonding. We have taken earths around all the pipework and fan canopys but what about stainless steel tables, shelving, etc? Would this need to be bonded? Also, tables and racks which are on wheels? Obviously being on wheels you'd...
  7. R

    ELECTRICAL CONTROL PANEL if possible FOR HEIGHT modifiable TABLES

    An electrical control panel, in particular for height-adjustable tables equipped with actuators or lifting columns driven by an electric motor. The panel has a first part (1) intended for fixed mounting of the panel and a second part (2) with operating keys (19) for activate electrical switches...
  8. C

    Commercial kitchen bonding

    Hi any thoughts on this ? Doing a periodioc on a commercial property with a restaurant and kitchen.Lots of metal tables in the kitchen (not fixed) gas ovens,dishwashers etc. The circuits are rcd protected the main bonding to gas/water is ok There has been installed a 6.0mm earth cable running...
  9. A

    Commercial kitchen tables

    we have a site where in a school kitchen there is a stainless table with just a sandwich maker on it, we are being told enviro health officer said it wants bonding is this correct? the socket is rcd protected.
  10. L

    ratio of reistance to CSA, (Robin tables)

    Hi all does anyone know where I could find a table of resistance per meter for he given csa of a cable. I know that, "Robin" produced such a booklet, but as I bought my Robin testers second hand, I didn't get the booklet which saves a lo of calculation. If not does anyone know where I could...

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

YOUR Unread Posts

This website was designed, optimised and is hosted by untold.media Operating under the name Untold Media since 2001.
Back
Top