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  1. V

    1mm attached to a 20A circuit

    Hi all EICR today on a ground floor flat .. 1 issue .. At the consumer unit there was a 1mm core with its yellow (sleeved brown) in a 20A radial circuit mcb ( socket circuit ) and the blue in with its neutral. When I disconnected it I found it was attached elsewhere to this circuit .. not in a...
  2. V

    Change to solar FIT payment contracts

    Hi all Is anyone aware of the change to solar generation FIT payment contracts for existing installations. (FIT payment scheme closed in 2019) It seems ofgen is changing all existing contracts which paid a set amount for 50% of of the kwh generated .. into only being paid for every unit you...
  3. V

    EICR code for lack of discrimination between RCD's

    Hi all Called to do an EICR on a property 4 studio flats / bedsits within a single house. The t&e sub main to each flat runs within the fabric of the building and has a 30mA RCD at its distribution point...assuming this was an add on to the original installation. Each flat has a RCD main...
  4. V

    Fittings rated for continuous duty?

    Hi all So had some issues lately related to high current fittings .. dp switches mostly. A number of electric boilers of various ratings .. from 7kw on up burning out their isolators .. the last one this week was a 7.5kw electric boiler running on a 6mm t&e cable 4m long from a 32A MCB .. 50A dp...
  5. V

    How reliable are you finding smoke detectors..whos do you prefer

    Hi all Recently we've been having a few issues with smoke and heat detectors.. been fitting them for years and years now mostly without any issues..occasionally changing battery's or units that are out of date.. but in the last 18 months we have a some problems. Last year we did a rewire and...
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    SSC metering expanation , why cant a smart meter be fitted

    Hi all I have a customer who wants a smart meter .. they are with edf .. The existing meters ...1 day rate , 1 off peak ..plus mechanical time switch are placed in the customers porch behind a panel rather than in a meter box ,.. circa 1965 I guess. In order to upgrade the consumer unit we need...
  7. V

    DNO charges for upgrading 100A TP+N service

    Hi all An industrial customer of ours is running a laser cutting machine at a local industrial estate unit. He has been there 15 years and has changed machines a couple of times ..but loading have always stayed the same or reduced a bit. This week they gave me a call as they could smell...
  8. V

    Series parallel motor starter with auto off proximity sensor

    Hi All A while ago a customer asked us to move a 1970s single phase corn mill and return it to use. It had an old series parallel starter with a lever on it ..which we replaced with a crompton controls series 3000 starter...all good and running. Now they had another ip rated box attached to...
  9. V

    Landlords EICR and t&e sub mains without RCD

    Hi All Been doing a lot of EICR for landlords recently due to new legislation and agents i guess. One common issue im finding even with relatively new (10 years) old installations is a T&E sub main. Now some of these have a 100mA rcd .. or no RCD .. some are even wired in concentric cable...
  10. V

    Rcbo test buttons not working - but works ok when tested

    Hi all Odd one today .. all 6 Hager rcbo's in a tn+n db have the test buttons not working.. But when tested with a multifunctiontester they react fine.. Now..I guess I'm going to have to fail them..even though they work fine. Hager technical say they have never heard of this. Db is in a plant...
  11. V

    Grade a ld1 commissioning certificates

    Hi all I'm after some advice regarding a fire alarm system we have recently fitted. The system is in a 4 storey building containing 7 flats from a single communal stair way. Each flat has an internal system with domestic type smokes and heats in every room apart from bathrooms .. plus an...
  12. V

    SHOWER TRIPS RCD ITS NOT CONNECTED TO

    Hi all OK..did a cu change yesterday .. old wylex with an external rcd for a new amd3 dual rcd cu. This morning the customer rings to say the shower has tripped the rcd. Turn up on site..and the rcd that has tripped is not the one that the shower circuit is on.! So i check for crossed over...
  13. V

    3 phase immersion heaters in star (no N) or delta

    Hi all Been to a micro brewery today . They have 2 water boilers with 3 phase immersion heaters in them (ie 3 x elements) Originally they were wired to run single phase will all the lives and neutrals linked out and a 32A single phase supply connected to them. Now they are wired in a star...
  14. V

    Single phase joinery planer / thicknesser runs slowly after new motor

    Hi all Got a customer who has a lightly used new in 2013 joinery thicknesser / plainer. The single phase motor burned out for no obvious reason a few weeks ago...and has been replaced with a new item of the same type by a reputable motor company. The new motor runs at slow speed only... I've...
  15. V

    equipment in a dno meterbox

    Hi all can anyone tell me of there experience of fitting gear inside a dno meterbox....? ie a switch fuse for submain.. or switch fuse as required if your tails or submain to your consumer unit is more than 3m away from the cutout..? im aware that the dno's regs may say i cant fit gear in...
  16. V

    invoicing , customer base , profit-loss , software

    Hi all Im looking for some software to manage our office work more effectively. Customer base records ...profit and loss and invoicing that sort of thing We are only a small contractor employing 3 -4 persons plus myself and wife doing books so it needs to be cheap enough to make sense for us...
  17. V

    3 phase motor does not change direction when phases are reversed

    Hi all ok...i was asked to wire a motor for a fan today....3 phase motor...it had its mains lead attached pre wired. when we finished wiring the supply and starter i was surprised to see it was spinning in the wrong direction.......well not that surprised ...the owner got it from ebay from a...
  18. V

    Rcd's that fail to operate in less than 40 m/s

    Hi All Ok...after many years of testing rcd trip times...having some failed or faulty rcd's....we are starting to come across perfectly good rcds / rcbo's . .from various makes....that wont trip at all..or wont trip in under 40 m/s. about a year ago...in a domestic property..we fitted a new...
  19. V

    30mA rcd trips at 17mA when submain connected mcb is on...ok when submain mcb is off

    Hi all Ok...been to a job today with a random tripping 30mA rcd its a bit of a full on install...at a undertakers.... 3p cutout feeds 3 main switches...1 for a workshop db...for a flat over the undertakers...1 for the undertakers.... from the undertakers mainswitch...we have a swa submain to a...
  20. V

    16A c 60898-1 tp mcb max zs @ 80%

    hi all does anyone know where I can find chart for 60898-1 (ie 3 phase) mcbs showing the 80% of max like we have for single phase mcb's. im slightly confused by bs 7671 no showing anything other than uo 230v....or am I treating each phase of a mcb as 230v. all advice gratefully accepted ta...

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