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power supply

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  1. ses

    Fire alarm power supply

    Good morning all I have a customer who after having refurbished his house was informed by the council that A cat D LD3 fire alarm system was needed Its not possible to install this without trashing his house (even with Aico wireless bases) It has been decided to fit a completely radio fire...
  2. J

    Power supply to garden workshop

    I am developing a prototype garden workshop design that has an off-grid power supply. The current setup is 300Wp PV, MPPT charge controller with 20A rated discharge current, 266Ah (C100) deep cycle battery and a 3000W (6000W peak) modified sine wave DC 12V to AC 220V inverter. This setup happily...
  3. L

    Power supply

    I have a question about power supplies. we have a 3 core 1.5mm power cable going to a junction box to power and instrument ( terminals 1,2,3). We also have 2 more instruments going to this jb and want to link the supply round. is it just a case of linking terminals 1to7 for live. 2 to 8 for...
  4. B

    ac adapter/power supply

    Hi, I am coming across more frequently ac adapters/power supplies designed for multiple country use by having a detachable plug face. Quite a few of these can be detached whilst plugged in and more worrying have no shutters exposing contacts.They have the relevent saftey marks on whats your...
  5. M

    Power supply for showers

    Hi, would appreciate some advice please, I'm not a sparks. I'm dealing with a refurb on a warehouse with three WCs and a total of 6 electric showers (2 in each WC) to be installed. They're unlikely to all be used at the same time but it's possible. Also in the warehouse there is a large...
  6. D

    Computer Power Supply: is it SELV?

    Just a quick question: would a circuit run from a computer power supply (this type: http://www.amazon.co.uk/tag/atx%20power%20supply/products ) FELV, PELV, or SELV? Thanks!
  7. J

    Range cooker - power supply installation

    Hi, i'm hoping for some advice really. I have recently ordered a large range oven, a 'New World Spirit 100DFT' Spirit 100DFT - Range Cookers - Range Cookers - Our Products - New World Currently I have no suitable power supply to the device so one needs to be installed. I've been advised by...
  8. B

    Double Garage 20A Power supply

    Hello all, newbie here looking for help and advice. Despite knowing a few things about 'trons' I'm not performing this work myself unless it's cast iron non notifiable. I need a minimum 20A supply operating in my new build (Nov 2012) attached double garage to run a light industrial woodworking...
  9. R

    Power supply to an additional lighting point

    Hi all A guy at work said I can spur off a socket to a 3amp fused spur and use that as a supply for additional lighting. Is this correct?
  10. H

    RS switch mode power supply

    Hi Guys, Has anyone come across this SMPS from RS, 445-107. Blurb says its class 1, because it has an earth pin. I cannot get a circuit from the earth pin to the '-' of the output. I have sent RS a question about this but have not had a reply. Must fail it as a class 1 appliance.
  11. T

    fire alarm block of flats power supply

    Hiya Just looking at a job there is no common area supply and the flat I am going to rewire, cu- board is in the common area they got the supply for the fire alarm from his board, I want to move the board into the flat, so the fire alarm supply will be in the flat so if he is away and it trips...
  12. S

    Wiring-Scheme: Two External Security Lights, Built-in PIR's, Single Power Supply

    Hi, I am looking to confirm the correct wiring-scheme needed to connect two of the following type (400W) security lights to a single power supply The two lights are currently wired to 240V as follows (NB Earth wired-up in the same manner, but left out for clarity): Both lights work...
  13. M

    Earth Loop Impedance Test and problem with power supply

    Hi, Our main fuse from the power distributor blew and Western Power attended and replaced. During this visit they established that their was a problem with reverse polarity and that when the RCD was installed the tails in the grey twin cable were connected red-black in the top of the consumer...
  14. G

    Making a temporary power supply

    Evenin all..... This is something i knocked up earlier. A 6 way memara board with 4 ways blanked off and 1x 16A and 1x 32A BS 3871 MCBs. 32A feeding 3 sockets on a ring ant the 16A feeding the bottom right socket as a radial. Bit of ply and a few hours and its nearly ready. Just needs some 10mm...
  15. S

    Salon master power supply

    I am to install x 2 13a dp fcu for a salon master water heating system. Do they need to be on seperate mcbs or is it ok to be on same ring. Do they need to be on RCCB side of board or would this cause nuisance trip problems.
  16. G

    Temporary power supply

    Evening all... Managed to acquire an old MEM BS5486 6 way dis board with 80A RCD incomer feeding BS3871 breakers. Tested out ok before removal so methinks...."be good for a temporary supply board that will". Not at work tomorrow so will make a start. I am thinking of keeping one of the 32A...
  17. D

    3 phase overhead power supply

    Hi folks I need some guidence on this. There's a 3phase overhead power supply feeding exterior accommadation at a hotel. What it seems they've done is taken the cable out at the chimney area at either end and then split the phases like you see on an electricity pole (wish I'd taken a pic). The...
  18. B

    Help establishing if i have 3 phase power supply

    Hi I am new to the forum so please excuse me if this is in the wrong place. Basically i am wanting to rent a property for my wifes new beauty business which is likely to include a few sunbeds. I have been told that the building needs to have a "3 phase power supply" - firstly, is this...
  19. Z

    Power Supply

    Hello I would like to make a power supply, I have chosen to make this power supply 0-30 VDC STABILIZED POWER SUPPLY WITH CURRENT CONTROL 0.002-3 A The thing is I can make it and copy it but I would like to know exactly how it works. I know some various components what they do but I get stumped...
  20. P

    Help with the power supply needed please

    Hi All I need to get a power supply to 20x Camping Pods (which will each have a power socket for a kettle and each will have a light bulb) - I also need to supply an office (which will have a couple of freezers, couple fridges, ice cream machine, drinks dispenser and various tills/computers)...

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