volts

  1. C

    TT System 400 Volts To Earth

    Hi all. First time on the forum, but have enjoyed reading many ofthe threads, thanks. I am looking for some advice on a fault from a TT systemand would greatly appreciate any input. History, my wife and I are volunteering in Africa for a fewyears. The charity I am helping does not have an...
  2. J

    Recommend Voltage Regulation for LED

    Hi I have been scratching my head over this one - first time posting on here, so "hello"! What I am looking for is the *best* solution to provide 2.4V DC at 700mA to a high power LED from a 12V DC supply (motorcycle indicator in this case). The spec' of the LED is:- Max Forward Current...
  3. G

    Calibrating voltage indicators

    Im getting everything setup for my part p assessment and am wondering if i need to get the voltage indicator calibrated, its the dilog combivolt 2. Ta.
  4. Les Macaulay

    Nominal Voltage

    Why has nominal voltage gone from 250Volts back in the good old days, to 240Volts, several years ago, to 230Volts more recently? What is the legal max and min tolerance in the 230Volt level?
  5. C

    Solar photovoltaics

    Hi Guys, Ive been looking at various different courses in relation to fitting of solar pv on a domestic level to begin with then progress on to larger installs the biggest problem im having at the moment is not only are most places stopped running the courses due to the reduced 'fits' but what...
  6. M

    sma sb1700 over voltage ac? Help pleaseeeee

    Evening all, I got called out to a job the other day were the customer has 2 x SB 1700's in the loft. The complaint was that the inverters cut out every so often, he knows this because he constantly monitors his sunny beam device. The error registered as unknown and to contact the installers...
  7. O

    Volt drop question

    Hi all Just had an enquiry for 50 kw ground mounted PV system, the proposed system is to be connected to a three phase supply In an industrial unit, the ground mounted array will be approx. 200mtrs away from the unit. The inverters and generation meters are to be mounted next to the...
  8. J

    Help with Watts, Volts and amps please

    Hi I just bought this SANDSTROM S42SWLH13 PREMIUM BLUETOOTH (Unboxed) | eBay It doesnt come with the power adapter but after looking at the specs of it i found out that it is a 27V/2.5A 70W power adapter I need, This exact one Sandstrom S42SWLH13 AC Adaptor | www.partmaster.co.uk Problem...

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