pressure | Page 4

pressure

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  1. S

    Anyone uses a Yankee screwdriver in this trade

    Ive seen a few people using them and im wondering if its useful for the electricians. Any sparks here use them. If you dont know what im talking about, its the screwdriver which you push and it turns by itself, if you know what i mean.
  2. P

    What Sound Pressure level Test Instrument would you recommend or use?

    Can anyone recommend a reasonably priced SPL that complies with BS EN 61672 that can be used for testing smoke and heat alarms? I'm struggling to find something that is well priced for an infrequent use but still complies. Thanks
  3. K

    Powerful Shower For Hard Water Area

    hi, I want to get a new powerful electric shower as my current one lacks pressure and gets blocked up quite easily (we live in a hard water area). I'm wondering if anyone has any advice they could share? I know there are lots of different types of showers, but does anyone have experience of...
  4. M

    DOL starter and switches

    Hi, I have a Dol starter which i would like to use for my single phase irrigation pump. The Coil on the contactor is 240v. there are 3 lines in L1 L2 L3. It is connected to a 17 - 25 amp overload. I know that I have to link the wires together some how, T1 to L3?? There is a start button on the...
  5. telectrix

    cold showers

    recently fitted new instantaneous shower for m-i-l. shower will not heat up due to showing low water pressure indicator. have problems with our own shower exactly the same but not constantly. united utilities have been and checked the pressure in the street and said it's good. but that's at a...
  6. S

    24v dc oil pressure switch

    can anyone help i have a 24vac oil pressure switch to wire up it needsto be wired from an existing panel... can i link out the existing 24v supply ??? it also needs wiring through a 24v light stack , green meaning normal pressure and red meaning high... the pressure switch has a common...
  7. J

    pressure switch

    Guys I am looking for a 3 phase pressure switch with unloader and half inch female inlet. Would prefer one which will take my gauge but not fussy was quoted £240 plus vat today. I think the guys at it can anyone help with where to get one in a hurry.
  8. S

    Shower Pump

    Evening gents I just have something I wish to confirm. Went today to look at shower pump which was faulty. I took the shower head off, to make sure it wasn't limescale but still poor water pressure, checked filter all fine and all connections fine too so pump obviously knackered. Im going...
  9. S

    loss of pressure

    i have to keep topping up my water pressure in my system because evertime i use my heating i loose pressure. any ideas what this could be.. thanks Stu
  10. S

    How does a IR Tester work?

    Hi guys, 1st post, so please be gentle with me! I know how to use one but does anyone know how an IR tester actually works? I'm using a Megger 1502 and testing at say 500vdc does it actually apply 500vdc all the time you press the button and deliver 1mA for the whole time? And how long should...
  11. H

    Star / Delta Compressor Diagram

    Hi all, Could anybody point me in the direction of a diagram for star / delta wiring for a compressor, obviously found them for the normal Y/D motor wiring with the stop - start but cannot find any with the pressure switch. On the compressor the pressure switch is NC but is there a diagram...
  12. C

    Electic Shower

    Installed a new shower and have the power light on the shower lit but when i switch it on i lose power.:mad:
  13. S

    Pressure relief valve and pressure relief device

    What is the difference between transformer over pressure relief device and transformer over pressure relay?
  14. P

    On/Off Control Circuit Question

    I’ve got a few queries about the operation of the 3-step control circuit. Have an exam on it this week and would like to clarify a few points as we’ll be asked a few questions on it. I’ll give an explanation of what the circuit demonstrates first. We want to maintain a constant pressure in a...

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