circuit

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  1. J

    Explain the process of Designing a Final circuit

    I have been given this assignment "the drawing below shows the floor plan of a small factory with the electrical symbols. Explain the process of designing the final electrical circuit that supplies all the elements 6 . The total length of the circuit is 25m. Any assumptions you have to make...
  2. rbbmcghee

    Low voltage in 120 circuit ?

    I have a voltage of 23v coming through a light socket in my house (There is a rely that is likely the cause but I’m not certain 1950s house) when I look up charts on how much energy it takes to power a light bulb it’s very low- or I’m not understanding something. I know the resistance on the...
  3. D

    Running new circuit to AC unit, please review my plan.

    Running a new circuit to an AC unit, making sure I'm on the right track. The attached chart has the information for this unit which is on column 4. Maximum overcurrent protection: 30 amps Minimum circuit ampacity: 19amps 240 volts It will be running across a rooftop in a pretty hot location...
  4. B

    Wiring LED Lighting Strips to Lighting Circuit

    Hi, I have bought a LED Lighting Strip (20 metres) to sit inside some Screwfix coving for my bedroom. Although it will be controlled by the remote control that came with the kit or the app, I would like to use one of the switches in a 1 gang/2 switch to turn it on and off at the wall before...
  5. K

    Replacing a standard slimline GE breaker with AFCI on a mulit-wire circuit

    Hi all! I am new to this forum. I will be updating an electrical 20 amp circuit from a home built in the early 80s. Since I am modifying a circuit, the NEC requires that I update the existing circuit breaker with an AFCI. As you know, the AFCI is twice as wide as the existing slim line GE...
  6. R

    Fox H1 max open circuit voltage,?

    I have 18 panels in 2 strings (37.8v open circuit voltage each) to be connected to a Fox H1 inverter. The manual says the below. Is the 600v open circuit voltage per string or for both strings combined? H1 series inverters can be connected with 2-strings of PV modules. Please select suitable PV...
  7. A

    Adding a 20 AMP tandem circuit breaker

    Hi. I am DIYer who is trying to add a 20 AMP circuit to a residential Challenger SB12(16-24)CN Mod.1 panel. The purpose of the circuit to is to allow the use of a 1400W pond vacuum. My first thought/question is whether this panel is compatible with tandem breakers (ie Eaton BR2020...
  8. C

    Heavy duty DIY next door possible cause of oven tripping circuit?

    Hello, new here! Would greatly appreciate some input. I'll first say I intend to get an Indesit technician to take a proper look tomorrow, but I'm curious. A couple of hours ago I tried to switch the main oven on as usual - the oven is only 2-3 yrs old - and a spark came from behind the...
  9. P

    What purpose is a capacitor in a motor circuit?

    So basically, if I wanted to increase the voltage across say a motor winding I would need to add a capacitor in parallel?
  10. C

    Amendment 2 new circuit SPD?

    So I need to add a new circuit, I was going to do it to amendment 2.. Its a commercial property and will be adding a new circuit for a defibrillator cabinet and associated accessories (lights)... There is a decent enough 3 phase board in place, but there is no SPD.. Obviously if we add a new...
  11. C

    MCCB used as a final circuit supply

    Currently pricing a 250a Power upgrade for a small warehouse, the new 6 way 250a MCCB panel will essentially be used to supply x2 fuseboards however i want to have the MCCB panel also supply the larger plant as i want the MCCB panel to take the heavy loads as the client said he will never be...
  12. P

    Fitting 16A hardwired oven to 32A cooker circuit

    Hi all, I'm new on here.... I have an existing 32A cooker circuit with a wall switch with 13A plug hole.The manufacturer says the new oven is hardwired and is 16A. Can I just replace the breaker in the consumer unit with a 16A one and use the existing wiring? Current breaker is a Proteus...
  13. M

    Am2s lighting circuit and data circuit

    Hi all, I need some advice for am2s retake I failed the lighting and data circuit and have no idea why! I wired the lighting with a neutral at each switch like the specification says, I am wondering if it was because I put the earths in connectors do these need to be connected into the back of...
  14. P

    Gfci breaker tripping

    Just installed a “used” Gfci circuit breaker on my panel. New CB’s not made for this older panel. Without a load wire even attached, CB will not hold and instantly trips when power is applied. Pig tail neutral attached to neutral bar. When I disconnect pigtail from neutral bus, CB will hold when...
  15. I

    GFCI issue that is not related to the circuit it's protecting.

    Having lost my father in law many years ago, an electrician and electrical engineer, I'm now at a loss for a sounding board for any issue that comes up that I get stumped with. I am hoping the fine folks here may be of some assistance. I am having a GFCI/ AFCI issue in my sub panel...
  16. B

    How to measure impedance/resistance of an AC circuit

    Hi, I’m fairly new to all things electrical but I’ve recently taken more of an interest after having a CU fitted to my shed. Is it possible to measure the impedance or resistance of an AC circuit with a basic multimeter? I tried to do this by connected each electrode over the positive and...
  17. C

    How to wire 300 blue LEDs?

    I would like to wire 300 blue LEDs to one power source in order to light up a tree. What is the best way to do this?
  18. W

    Fault on lighting circuit

    All CPCs on upstairs and downstairs lights were live due to the cpc of upstairs being disconnected from earth bar. I was getting 230v between cpc and neutral at the light, the 2 circuits are separate and the rcd never tripped, anyone had this before or know why this would happen
  19. J

    Bad practice FCU to lighting circuit

    What are your guys thoughts on this a 13amp FCU feeding of a ring feeding a light. I know usually people fuse at 3amp but if unlikely to cause overload does it actually have to be fused down?
  20. rrschw

    85V on neutral after space heater on circuit...?

    I'm not at all a certified electrician, but I have a strong self taught background in electricity and electronics. We moved into a new home this year, and Austin got cold this week. I put a space heater in my room for the first time, and after an hour or so it flipped the breaker. Or so I...

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