temperature | Page 2

temperature

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  1. M

    Oven thermostat & temperature

    Hi, looking for some advice. The wife recently said the oven doesn't cook food the same way it used to (recently a chicken pie came out cold in the middle). So I bought a oven thermometer, put the oven on 200c and after about 7 minutes the light went out. I checked the oven thermometer but it...
  2. KeenPensioner

    Zs and temperature correction

    Hi, as an aspiring sparky I'm needing help with the temperature adjustment formula for Zs. I'm using GN3 (17th). I understand that the values given in Appendix A - Table A4 (for BS 60898) are assumed at a test ambient of 10C whereas the values in BS7671 are at the "normal operating temperature"...
  3. J

    Input water temperature for electric shower

    I have a solar pv system that has an Iboost fitted to send excess generation to my hot water tank. Combined with my solid fuel back boilers we almost always have hot water. I also have a cold mains fed 11kW shower - not a power shower. I would like to feed the shower with luke warm water via a...
  4. C

    Conductor Operating Temperature H07RN-F

    Hi All, I'm trying to calculate CCC & VD for H07RN-F Single core cable. Used for event powerlock runs. TPN AC - Ref Method C - Flat & Touching Table 4E1A/B covers Single Core 90*C thermosetting insulated cables, which I have used correction factors to convert these values to flexible cable but...
  5. B

    BS 7671 max surface temperature under fault condition ???

    Can anyone give me some clarification on the following. I am installing some Osram Planon Plus led light panels into a temporary building and have been told the transformers need to housed in an enclosure as they do not have the correct markings for BS7671 "max surface temperature under fault...
  6. S

    Temperature coefficient of materials

    So I’ve nearly completed my “City & Guilds 2365 Level 2 Diploma in Electrical Installations” I’ve started to study for the electrical science exam and come to a point in the level 2 book where I am stuck and struggling to understand this part. Can anyone help that isn’t going to judge me and...
  7. SJD

    Batten light fitting for high temperature use

    I need to source a batten light fitting which sits over a range in a kitchen, in a big commercial extractor hood. Existing fitting has cooked and now failed. For example, a 3 or 4ft fluorescent or LED batten, the main criteria is that it will survive being over lots of hot & steaming pans every...
  8. S

    Electric shower temperature fluctuating

    Hi all plumber here... My customer complained about fluctuating temperature at the electric shower so I removed the said shower and replaced with a new one. They still have the problem, and a neighbour has suggested it may be "something to do with the fuse box" Is it possible that this could be...
  9. I

    Temperature probe with 110k ohm resistance!

    Hi all I have an electric underfloor heating system in my bathroom with a Timeguard TPT88 controller: (TPT88 - 24 Hour/7 Day Multi-Programmable Thermostat | Timeguard - http://www.timeguard.com/products/climate/thermolay-ufh-controllers/24hour-7-day-multi-programmable-thermostat) The system as...
  10. Gary Tollison

    loop impedance, temperature, cable factor....

    Hello I'm not sure if this is the correct forum area to post this in, apologies if it isn't... I've been working through some mock questions on-line, and found myself confused by this: The measured value of loop impedance for a circuit is 0.83ohm. If the temperature at the time of the test was...
  11. S

    Chimney breast temperature.

    I'm trying to find out the likely maximum tempertaure that will occur on a chimney breast so I can work out what type and size of cable to use for a socket, and whether I need to move some existing cables. The chimney is granite with a clay liner and will be serving a multi-fuel stove with a...
  12. J

    Flat Heater Temperature Control

    Hi, I've posted threads related to this issue quite a few times but never got to the bottom of it, largely because of my own ignorance, but I feel like this thread might be the one! So, I have a version of this heater: https://www.hennlich.bg/uploads/en_galmatherm.pdf It's 1kW. I'm putting...
  13. J

    Heater temperature stopping

    Using to a heater to heat 5L of water. 1. How can I stop this heater at 70C without a thermostat? 2. Will a potentiometer work?
  14. J

    Water Tank Heater Temperature Control

    I've just ordered one of these: https://www.hennlich.bg/uploads/en_galmatherm.pdf It heats the water in my tank up to 80C in about an hour and a half. I'd like to be able to have some temperature control, so I can set at 50C, 60C, 70C etc. What's the simplest way of doing that?
  15. P

    Cables with thermosetting insulation (XLPE cables)

    I understand that XLPE cables operate at a maximum temperature of 90c compared with 70c for PVC insulation. What I don't understand is why the increased temperature permits a reduction in conductor size if XLPE insulated cables are used in preference to cables having PVC insulation. If the...
  16. GBDamo

    Voltage Drop Calculations, Potentially Stoopid Question?

    With reference to Voltage Drop calculations and Table F4(ii) OSG page 151. When designing an installation the cable is selected, among other factors, so that the maximum operating temperature is not exceeded, in this case 6242Y T&E = 70C. The table, titled "Voltage Drop (per ampere per meter)...
  17. J

    Dry ceramic wall heaters

    Are dry ceramic wall heaters a modern version of storage heaters, i've just got an old cottage that i'm going to renovate, it has old storage heaters in each room aswell as an open fire (coal type). There's no gas supply to the area as it's in the country and i didn't want to go down the route...
  18. Flanders

    4mm 90 Degree Thermosetting cable on a 32 amp MCB

    Hello Can I just confirm that if 90 degree cable is used in switch gear that is only ratted at 70 degrees then you use the 70 degree tables to find the maximum current carrying capacity in this case Table 4D1A I ask this as I carried out an EICR and found 4mm 6491B cable run in trunking...
  19. L

    Very Hot Room nearly 30 degrees C

    Hi All looking for some advice again. I got a room in a care home that is reaching 29 degrees C on a day to day basis. There is an air conditioning unit in there but that is not making any difference. This room is an internal room with no external walls (with another 2 floors above). We have...
  20. J

    DIY blue flashing lights - choosing lights

    My dad is an emergency driver. All he has is a dash light that I bought him from amazon last year. Since my dad is an electrician I thought I would get him some blue LEDs so he can make his own lights as he complains about the price of emergency lighting.

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