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maximum

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  1. E

    Maximum ze reading help.

    Hi. I have have tested a property with a TN-s system and the main ze reading is 2.98 ohms which is far to high for a TN-s system which needs to be within 0.8. What would be should be done in this situation? Contact electric board? Thanks.
  2. D

    Fluke Meter Pass/Fail Indication?

    Hi I have a Fluke 1653b and it claims to have Pass/Fail indication on RCD's ?? Where? Is this on the auto mode? I can only get it to auto test then I have to scroll through all the measurements. There is no mention of this feature in any of the manuals?? Help!!! Thanks
  3. D

    transportable building periodic certs

    In section K of the NICEIC periodic certs, how do you find the MAXIMUM TOLERABLE UPSTREAM IMPEDANCE [ZT] donny
  4. D

    maximum demand kva 3 phase

    looking to get a bit of help got a job that currently has 8 flats and a landlord supply and a big office on the ground and basement After using the OSG for diversity have come up with the following 118A per flat (no gas) 127A for landlord (lift etc) 180A for office (air con)...
  5. W

    Maximum Number of electric showers!?! Help

    Hi guys Basicly iv got a 6 bedroom house 100A bs 1361 single phase supply main fuse board is new with 25mm tails with 2 spare ways would a extra submain fed by 25mm tails for the origin support 5 shower circuits say 40A MCBs 10mm cables 8KW showers taking into consideration diversity would this...
  6. delano

    maximum demand

    Is there an accepted rule of thumb formula for maximum demand?
  7. A

    Maximum demand

    Hi guys, I'm looking to install a sub board to feed 4x 8.5kw shower circuits and 2x 2 ring 3kw hob circuits (4x32amp MCB's and 2x16amp MCB's). What would be the best method to work out the maximum demand? I get 83amps. Many thanks in advance.
  8. B

    Maximum KW Shower on current set up - pics included

    I'm intending to finally refit my bathroom, first thing I want to get sorted before I start removing tiles and making a mess is the maximum KW shower I can currently install and what are my options as my current shower suggests my electrics may not be suitable for modern showers. 6mm cable The...
  9. T

    AC Circuit Theory Maximum Power Transfer

    Hi Everyone, I'm trying to determine, for the network shown below the value of the load Impedance that will dissipate the maximum power and the value of this power.I already calculated the Rth , but I'm stuck on P=I2R.Can someone help please? Thank you.
  10. M

    Maximum cable length.........??

    Good afternoon all, firstly im pretty rubbish at cable calcs. My question is this, the load on the circuit is 6.6kw for a outdoor ev charger so the cable would be clipped direct. Using 4mm NYY cable is ok subject to the cable length, any ideas on the maximum cable length before having to use...
  11. S

    What maximum Zs should be used?

    Hi all, Scenario: A fused spur unit added to a ring main to supply several window actuators via an open / close rocker switch. The ring main is protected by a 32 Amp type B Mcb, the fused spur would only require a 5 amp BS 1362 fuse (lets say a 13 amp for worst case scenario in case replaced...
  12. linuxthefish

    Maximum load for shaver socket in bathroom?

    Hi, what's the maximum load I can run from a shaver socket in a bathroom? Can I run speakers in the bathroom from this point? If that load is maximum, can I put extension cable into the bathroom and how long does it need to be away from the shower?
  13. M

    Maximum demand / diversity (commercial)

    In preparation of wiring up a commercial premises (function rooms / bars / restaurant area) I am trying to determine to what extent the existing 60A single phase supply might need upgrading. I have not had to do this myself for a commercial premises, and I am wondering if the same rules apply as...
  14. S

    Maximum demand & diversity

    Currently completing 2396 project (cant wait to see the back of it!!) Would just like to check im on the right wavelength when calculating max demand and diversity DB1 Maximum Demand & Diversity Lighting - 90% of total demand. Total demand of lighting circuits is 50.48amps. After...
  15. M

    100mA maximum test current

    In my latest exam a question asked: what is the maximum test current for a 100mA RCD, 50mA, 100mA, 150mA or 200mA I think I have revised so much by brain has turned to mush! I believe the answer is 100mA but could someone please confirm?
  16. J

    Problems with Maximum Demand figure

    Hi guys I'm after a bit of help with working out my Max Demand normally in a domestic situation its fine but theres so many heaters and water heaters on this that I'm a bit confused. I have been asked to do a bit of commercial installation for a kitchen and toilets its a children's soft play...
  17. M

    Working out Maximum Demand.

    Hello all. As above. There seems to be much confusion on the subject and working it out "accurately". Thanks Matt
  18. J

    Maximum size MCB on a 16A socket outlet

    Hi guys this is my first post asking a question so here goes! I'm currently having a debate with my boss who is adement that you can only have a 16A MCB on a 16A socket outlet. I'm sure I've seen somewhere in the regs or OSG that the maximum size MCB is a 20A on a 16A socket (Don't ask me why...
  19. D

    Maximum Ze value for TNS and TNCS System

    I am wondering where the maximum values (0.8 and 0.35 ohms) come from. Why are they 0.8 and 0.35? Any help would be greatly appreciated
  20. P

    Maximum Demand

    Can someone help me work out a max demand got a 40amp shower 32 amp cooker 16 amp radial 16 amp radial 32 amp ring 6 amp lighting 6 amp lighting whats the calculation to work out max demand please

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