circuit

  1. Bob Geldoff1234

    Boiler off lighting circuit?

    What is everyone's opinion on taking a combi boiler supply off the lighting circuit? I doubt the boiler would pull more than 300 watts and with all the led lamps being used on the lighting circuit,I doubt it would come to more than a couple of hundred watts.A 3 amp fuse in the boiler spur would...
  2. Raptor0014

    Passing another circuit through back box

    Had a bit of a ‘discussion’ today with another electrician. Basically found a light switch in which the radial cable for a socket directly below (but about 3ft lower) passed through. Other electrician said it was wrong and shouldn’t be done. My take was that it is, at best, a bit of bad...
  3. S

    Put a ring circuit in a garage.

    Hi there. I'm a DIYer. Just bought a house with a double garage that has just one socket in it; and it seems to be just a single spur direct from the CU. I want to put in more power outlets; and was wondering whether it's permissible to remove the existing socket, put in a 32a fuse/breaker, and...
  4. lozarus

    Testing when modifying a circuit

    Afternoon all. Bear with me on this one... Despite having been involved in the electrical industry for many years, I'm only just about to embark on 2391 - its more of a personal endeavour than anything, having been very interested in inspection & test for a long time (I know, not everybody's...
  5. I

    will SPD protection now have to be added for an addition to an existing circuit

    can any one clarify if a SPD will now need to be installed when making an addition to a existing circuit? many thanks
  6. OhhhMy

    Residual Circuit Current Breaker triggering. Why?

    Hi! I'm new here, so, please, be gentle... Decided to add some extra features to my old and simple barn's electric system to make it safer and measure the consumption. It's a three phase 230/400 volt line. The neutral, as far as I know, is grounded at the step-down transformer. I don't have a...
  7. M

    Circuit breaker rate sizing

    Hi all I would like to know what should be the rating of Air Circuit Breaker to select for a Genset based on the following data: 2000k VA PF 0.8 1600k W load connected to the Genset via dedicated busduct. Supply: 415 V I have an idean in mind (whether right or wrong) but I would like you to...
  8. gmdaly

    distribution circuit from house CU to adjoining Garage DB2 EIC details?

    Hi, I have completed a EIC for a garage DB2 with five final circuits (no problem there i think). But for the distribution circuit from house DB1 to Garage DB2 I have completed a second EIC for this alone. The questions I have for the distribution circuit alone are: 1) For the EIC 'particulars...
  9. Izak568

    How to investigate a circuit if some devices pull too much current?

    Hello, If one device is pulling too much current, what should I do? Thank you
  10. S

    Messy choc block for lighting circuit

    I have just been in the process of changing some old 12v halogen downlights in the bathroom for bathroom for mains volt leds. My late father was a retired spark so know a little of doing some basic things. The previous downlight transformers had been wired into a choc block which was just...
  11. S

    New circuit in plastic consumer unit. Yes or no?

    I work with someone who really isn't happy installing new circuits into plastic consumer units. Sometimes he refuses to do it if the board in question isn't in a great state or if the existing wiring is spaghetti junction. Obviously the regs state that it's fine to add if the board conforms to...
  12. brokentechie

    Running ring main wiring and lighting circuit wiring together/in close proximity.

    I'm building a "media wall" type structure, to house TV, av equipment etc, with alcoves each side lit by Led downlights and I'll be extending my ring main also as part of the build. My question relates to clipping cables to the ceiling plate (2x3 timber) - is it acceptable to run 1mm T&E...
  13. D

    208v heater doesn’t work

    I have a 208v circuit that reads 208v across the leads on my meter; but when I connect a baseboard heater rated for 208/240v that works elsewhere in the same house it doesn’t work. Appreciate any assistance!
  14. 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...
  15. 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...
  16. 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...
  17. 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...
  18. 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...
  19. 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...
  20. 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...

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