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  1. Lenny

    3 phase furnace

    36,000 / (400x1.732) = 51.96A. This is your design current (Ib) Select a fuse rating (In) that suits your (Ib) and make sure the tabulated ccc (It) of your supply cable is greater than (In) after any correction factors have been applied.
  2. Lenny

    Howdy

    Yeah, long time ago though.
  3. Lenny

    Howdy

    Morning all Just saying hey....again :cool: used to be an admin on here many years ago but stopped using forums for a long time. Just nosing around, can see quite a few very familiar faces, hope everyone’s well. :thumbsup:
  4. Lenny

    Ring main in 4Core SWA

    Hi. The list below gives the physical CSA of MICC copper sheath when its used as a cpc. Hope it's of use. 2L1 ****** 5.4 mm2 3L1 ****** 6.7mm2 2L1.5 ****** 6.3 mm2 3L1.5 ****** 7.8 mm2 4L1.5 ****** 9.1 mm2 2H1.5 ****** 11 mm2 3H1.5 ****** 12 mm2 4H1.5 ****** 14 mm2 2L2.5 ******...
  5. Lenny

    Limited Company Setup Advice.

    Thanks for the replies. Increased turnover and wanting to remove personal liability due to larger contracts with national companies makes me want to go Ltd now.
  6. Lenny

    Limited Company Setup Advice.

    Hi all. I'm about to start proceedings for creating a limited company. I've not had any real experience nor have any real knowledge of this area and have a couple of questions. 1. When invoicing another company for work carried out, would you deduct say 20% of the total amount and place it in...
  7. Lenny

    PT Connection To Pump

    Sorry for not following up. Turns out the fault was due to airlocking around the PT. The new VSD didn't like the setup so I moved the PT further along the discharge pipework and it worked fine. Thanks for the replies, nothing worse than when you start doubting yourself!!
  8. Lenny

    PT Connection To Pump

    Yes. Starting to think it may be an issue with airlocking around the transducer due to its position as part of the pump assembly. With the loop calibrator connected in place of the transducer, the pump responds as it should.
  9. Lenny

    PT Connection To Pump

    Thanks for the reply. AI2 has been configured in the grundfos go app for pump control via discharge pressure into a private water main. I've taken a 24V supply to the transducer from terminal 8 with the return from the transducer into terminal 7. Screen is connected to gnd. The pump doesn't...
  10. Lenny

    PT Connection To Pump

    Hi all. Could someone please confirm where to connect a 4-20mA pressure transducer to AI2 in the attached photo. I believe it’s terminals 7 & 8 but the pump is not responding at all. Thanks.
  11. ADB920EC-18CB-451A-8FF1-E78CD71E3F43.jpeg

    ADB920EC-18CB-451A-8FF1-E78CD71E3F43.jpeg

    • Lenny
    • Media item
    • Comments: 0
    • Category: Professional Electrician
  12. Lenny

    Tool tray

    I used to use one of these tool trays, it was made by contico.
  13. Lenny

    Need to buy a multi meter

    Is it an actual multimeter or multifuction installation type tester you're after??
  14. Lenny

    Please help! Boiler ch pump always on!

    We need a bit more info here before we can offer advice. Is it a new system in a new house, does it really 'always' run i.e 24/7 or does it just overrun for a couple of hours, what make of boiler do you have??
  15. Lenny

    distribution board

    By black stub slv do you mean black stub sleeving i.e MICC cable conductor sleeve?? If so, the outer the outer sheathing of the MICC cable is the CPC and tbh, you wont find a lot better even after 30+ years. What problems are you having??
  16. Lenny

    Twin and earth clips that don't clip

    Unifix cable clips are the best fitting ones I've found.
  17. Lenny

    Which Van is best for an electrical contractor?

    Depends on the engine. At that age you may have one of the very first CDTI (Z17DTH) 100bhp models which are brilliant and the important parts are all Isuzu. Or it may have the DI or DTI engines. Both the earlier engines are sound but wont win you any races as they were a bit underpowered. All...
  18. Lenny

    Cudis Consumer Units

    Indeed. The MCG TP&N boards are absolute bilge!!!
  19. Lenny

    Advice on career ?

    What modules did you do in your btec?? I only ask as they may be more suited to an industrial maintenance type role rather than electrical installation.
  20. Lenny

    Electrical engineering

    What HNC are you doing?? That sounds more akin to a building services one than electrical engineering. Also bare in mind your tutor will make all the right noises to get you to sign on the dotted line! When I did my HNC/D, the maths module was mind blowing! Granted, I didn't do a levels and...

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