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  1. W

    240v outlet voltage drop under load

    I have a 3 prong 240v outlet for a dryer that reads 240v across both legs and 120 across the ground. When I turn the dryer on and have the multi meter to the ground and a hot leg it shows 120 but if I switch it to the b leg and ground it shows 40 then climbs up slowly to 120. The ground is new...
  2. E

    Do illuminated switches pass current to the load side when off?

    I installed an illuminated switch (switch is lit when circuit is off) for my porch light. I noticed that even when off, my LED porch lite is dimmly lit. I measured the voltage at the socket and it was 25VAC. Is this expected or did I install a faulty switch?
  3. Rebwar

    Circuit Summary and load calculations, L3 design project

    Hi Could someone check my answers in the page aploaded please? I'm not sure about my answers according the notes number 1 to 4 and also the stated circuits. Thanks
  4. Z

    What are the causes of unbalance current during no load test of transformer?

    What are the causes of unbalance current during no load test of transformer?
  5. E

    How to calculate site load and availability for expansion?

    I have been tasked with seeing if a site is capable of accommodating a large new installation. I have done some working out but I'm not sure if I am going down the right lines, as this is not my area of expertise. The site has a main fused switch disconnector on the main incoming supply...
  6. V

    Load resistor ..........

    Hello to everyone, and excuse me for the stupid question :) I have a valve in my cooling system that I need to disable every now and then so my acc heater heats the engine as well as the cabin. Anyway. The valve is 13ohms has a consumption 1amp and runs on 12v.Is it all right if I connect a...
  7. G

    Cloth wiring outlet box load wires got disconnected, how to identify hot and neutral

    Hello all, I have an outlet box in my house built in the 1920s that I am changing to a GFCI. The wiring is cloth wiring so I have a hot and a neutral. On this outlet box I have the hot and neutral line wires coming in from the bottom, and on the top I have 2 load wires which go up to the...
  8. J

    3 phase load balancing

    Hi all, just looking for an outside opinion on this. A collegue and I are going to be installing 4 three phase EV chargers on a site. He's of the opinion that we will need to invert the phase at each charger in order to balance the load, i dont believe this is correct as equipment with 3 phase...
  9. Khanzada

    Load calculations on three phase board

    Costumer have 12 flats and need to feed for each flat a prepaid meter and consumer unit within the flat , the main supply to building is three phase , my question is how to distribute the load for 12 flats, each flat have a load of 63A. Main supply is three phase .
  10. littlespark

    Gym treadmill likely load

    Got an issue with gym equipment. ( I keep telling my wife I’m going to the gym, but she doesn’t believe me!) The gym owner says the circuit for treadmills trips out every now and again. I went there last week to find a 16A type C RCBO supplying 1x metal clad double 13A socket. From here, there...
  11. G

    Battery tester that test batteries under load

    I am confused about battery testers for house hold batteries, AA, AAA, 9V, etc. Recently my smoke alarms started chirping so I changed the 9V batteries and no chirping. However, the replaced batteries tested good using GBT-500a battery tester. I was told that batteries need to be tested under...
  12. Pat H

    Critical load from PV battery

    Hi folks. I'm having a PV system installed with a 5KW Amasstore GTX5000 Battery. This comes with a critical load output. I have the spec sheet but its not clear if this output is active all the time or only engaged when the grid power goes down. I'm assuming its live all the time (unless the...
  13. OnlQQker

    Load Following (National Grid)

    I can't get much information on this for some reason, apart from this It seems to me like there are still humans monitoring the loads day and night, though the data is all computer driven. What are the devices called that either increase or decrease the supply. I keep hitting a blank when...
  14. M

    Testing Feed and Load - 45A oven switch

    Hi. I got a new oven the other day and it was working fine. Last night, I swapped out the 45A wall switch for a brushed brass type one. The neon light lit up, the clock on the oven came on, job done. However, today I went to grill cheese on toast and the grill only got moderately warm. Its also...
  15. B

    Any way to overcome the minimum load for an LED dimmer switch?

    Per this document: https://www.lutron.com/TechnicalDocumentLibrary/048487.pdf I guess dimmer switches have a minimum load required for operation. I believe this is the problem I have run up against. In replacing the halogen bulbs in my light fixture with all LEDs functionality ceases. The...
  16. C

    UK Load in Amps on a mains single-phase circuit

    I have a 230 Volt single-phase circuit with a 100 Amp cutout fuse and a 100 Amp MCB switch, so the supply is rated at 23 kVA. Only about 13% of my total energy consumption is electricity. The remaining 87% is natural gas, supplying the following appliances (kW figures are net output power):-...
  17. D

    Load Monitoring kit

    Anyone used one of these for kVA calculations? I'm fed up of approximate MD figures. If not what are people using? Heard some have GPS capabilities but I don't want to pay £££££££
  18. D

    Generating a load on a new wall switch

    I expanded the switch box in my master bedroom from a two gang to a three gang so that I could add a fan control switch. One of the existing switches controls an overhead light and the other controls a wall outlet. I made the assumption that the power to the ceiling fan was ran to the switch...
  19. E

    IR testing with a full load?

    Hi all, I'm sure this question has been asked before but just can't find it. When doing the IR test on a 3phase commercial board, how do you go about testing the circuit if there are items that just can't be disconnected, ie Bank of lights or immovable equipment, is there a trick to doing this...
  20. 1Justin

    EV chargers load curtailment & remote Ct. Recommend me a brand?

    Can anyone recommend an EV charger brand/type with load curtailment (throttling) which is easy to interface by manufacturers design, with a remote Ct clamp (via radio link)? Situation as follows: Customer in 18c manor house converted to flats, living third floor. Supply head is ~ 35M away with...

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