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  1. B

    Why is an FCU max. 13A.

    I was at a customer's yesterday who wanted three double sockets added to a room which currently only has one double socket which is spurred off the ring. I explained that we couldn't spur off the spur as the first spur can only take 27A, so suggested that the solution would be to replace the...
  2. Y

    Design course max demand question

    Hi all, I appreciate this has probably being posted time and time again, but I'm using my phone and the search threads button isn't working. Basically I'm just starting my design course (2396) project and I'm on with working out the max demand and diversity, basically I've split the job up and...
  3. Clive P

    Fat Max Tote Bag.

    Hi, Picked up one today at the orange shed for £19.50, thought that was a good price. Regards.
  4. M

    Max Ze for TT system

    Hi Gents and ladies, I have been asked to quote on installing a couple of extra socket on a TT system. When checking the existing installation my Zs readings on the ring are coming out at 39.8 Ohms (most remote). This is unacceptable (table 2d OSG). I then checked Ze readings which are...
  5. S

    max measured earth loop impedance query

    Hi guys, Im just filling in my first ever solo EIC when I check the onsite guide and gn3 for max permitted zs (tabulated) for bs60898 type b 32A the table shows 1.16ohms but to me it didnt ring a bell, checking bs7671 table 41.3 shows max zs to be 1.44. Can anyone shed some light on why and...
  6. R

    cooker circuit max load 14kw

    Hi all Am started a kitchen for a customer who knows it all he does want any floor lifting etc to save on mess. But the situation is existing 6mm in, is in good condition but there is a hob and double oven wanting to go in. Now the hob is 7.2kw and the double oven is 5.4kw . I would usually put...
  7. 9

    Max Power of a Photovoltaic System Batteries

    Hello everyone! I have a quick question for you: someone could please tell me which is the average maximum power that a battery in a PV plant can "store"? In other words, which is the maximum SoC the generally I can achieve? Thanks in advice, AP
  8. J

    cable size and max load

    What is the max load a 6mm cable can take think the run is about 16 m clipped surface s w a cable 5 core
  9. L

    Max Zs value

    Hi Would anyone be able to help me, Max zs value for type c 32amp RCBO on PME system- 0.72/0.58 or 1776 ohms? Any help would be appreciated
  10. F

    WIN a Pair of CK RedLine CombiCutter3 MAX TM side cutters

    Online reviews comprised by others who own, or have perhaps used products are crucial in the decision stage of purchasing equipment. You may want to read the experiences shared by other electricians who have purchased an MFT or maybe even a set of test leads that you are considering. As such...
  11. D

    Exceeding Max Zs

    Hello, first time poster, long time viewer. Testing a school which on the socket circuits have BS 3871 type 3 breakers with a 30ma RCD attached. Some of the socket circuits exceed the 0.72 ohms max zs for the breaker. Should I be using the max zs as 1667ohms? I seem to remember that if max zs...
  12. T

    Max ZS 2A

    Does anyone have Max ZS for 2 amp 60898 mcb thanks
  13. S

    Max Zs for D type mcb

    I have a 40 amp 3 phase motor to install using a star-delta starter for a large fan in a grain dryer. The manufacturer specifies a 50 amp d type breaker. The problem is the max Zs for this breaker is 0.23, the Ze of the installation is 0.19 and the motor is to be situated quite a distance from...
  14. S

    Max Zs Values

    Anybody know where I can find Max Zs values for BS88-2 fuses over 200A please? The regs only go up 200A. I know I can contact manufacturers and ask them, but wondered if there is a quick reference anywhere? Thanks
  15. E

    max demand

    When working out max demand do you add the Ib for each circuit together ?
  16. E

    New Zealand Looking for Extreme Extractor Fan with Max m3/h

    I need a massive air flow for my server room aka metal shipping container 6m x 3m x 2.5m Found this but it is huge and heavy and expensive, are there any other options? I need something compact like a turbine with duct with enormous air flow per hour Industrial Extractor Fan 500mm 230v 1400rpm...
  17. C

    Max floor area of a ring main?

    I always thought that you were allowed "unlimited socket outlets within 100m Sq." I got told today that if the floor area was above 75m Sq it required an addittonal ring and this was the "new Regs" . Is this correct?
  18. bartkusal

    Block of flats. Max Demand

    Wonder if I can get some guidance, on max demand in block of flats. It always was hard for me as it always comes to massive demands, and I red here that it all comes with years of experience and that it is like an art. This is first bigger project I am taking on. So please don’t shoot. I need...
  19. N

    Max PSCC 1 phase and 3 Phase

    Hi all. Prospective Short Circut Curret. Now , if you measure the impedance on a installation P to N , and get a reading of 0.21 OHMS , the max current flow between these two points P and N will be 230/0.21 = 1095A.....1KA. Now if you have 3 phases , and each are the same impedance P to N ...
  20. J

    Short circuit capacity & max zs

    Hi all. I tested a building last week where they had used bs 3871 and also bs 4293 rcbos/mcb's. I can't seem to find the ka of these and also the max zs permitted.

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