breaker

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  1. B

    SD Q1TF bad hammer in breaker?

    40 year old square D QF1TF long span top fed. I turned off 30 amp double pole to water heater and still had a closed circuit, then turned off the main above. I then returned to reconnect service at main on service panel only to find that I now was experiencing voltage drop on outlets in home...
  2. RK1984

    Main breaker in the main lug only subpanel

    I am building a duplex. The service enters the house through the wall of one of the units, where the main panels for both units are located. Then the service lines go inside the walls to the garages of both units, where subpanels with all the breakers are located. At this point the subpanels...
  3. Mark W

    Classic 275,000 volt, 15,000Mva JW420 bulk oil breaker

    The above picture was taken at the festival of Britain and it shows a BTH bulk oil breaker, for me this represents the development of the super grid and how Britain was able to assist the world in developing higher transmission voltages. These units are still in service and in only a few years...
  4. RicoRepairs

    Ground floor lighting trips circuit breaker.

    Hi all, so just moved into a new property, the light fitting/rose was removed from the living room, nothing looks to be shorting (But there is a single neutral with no connector block?) but the breaker trips straight away. There are 4 fittings on this floor, none with bulbs in, none with any...
  5. H

    EV Charging Circuit - Breaker Hot

    I installed a new 50 amp circuit to charge my EV. Some specifics on the circuit - 50 amp breaker, 6-2 ga copper wire (UFB because in the future I may place the charger outside and wanted flexibility), NEMA 6-50 plug, Grizzl-e charger at 40 amps. My question is on the breaker itself. I have a...
  6. N

    Low voltage from a 120 v breaker box, sometimes

    I'm taking a look at the 120v wiring in an old travel trailer that I recently bought, and plan to live in full time soon. It has some quirks that I will explain below, but first here's a pic and diagram of what's going on: Here's the breaker box as it sits now And of course, a diagram to...
  7. S

    15a breaker randomly tripping..

    HI.. I'm in Scotland, UK.. The 15a Wylex push button breaker that supplies my garage with power (30m from the house mains panel) randomly trips. I threw the isolator switch in the garage, so there was nothing loading the circuit but it still trips out after a few hours. Changed the breaker to...
  8. B

    Breaker for generator

    I have just bought a generator for back up power. Honda EM4500 and has both 110v and 230v outputs. The circuit breaker for the 230v is snapped and when looking up the part number 38220-ZR7-F21 19a breaker it’s coming up between 60-90£ And mainly shipped from overseas. Can anyone recommend an...
  9. P

    Old school type (horizontal) QOT2020 breaker question

    What's the standard rule on the older horizontal or "side-by-side" QOT tandem breakers about which switch controls which circuit, since one of the hot wires is stacked or hidden behind the other? Thanks!
  10. M

    110v 20amp circuit using existing #8 Alu wiring to 40amp breaker.

    I am abandoning an oven/microwave location that has an existing 220v 40amp (4-wire) circuit. I am leaving the wiring in place. I want to use the new counter space for a built-in microwave oven and coffee station. Can I use one of the 110v circuits in the junction box for a 110v 20amp receptacle...
  11. pythonrsas

    220 Breaker / 110 Circuit

    Hello Experts, I had an electrician visit my place for some repairs and when looked at my recently installed main panel (photo attached) he said that the panel is not setup correctly. He said that 220V breakers are connected to 110V circuits within the house. Could someone explain what the...
  12. M

    230v breaker ratings

    **DIY'ing a campervan, trying to plan the electrics myself before getting help to install so I understand what is going on under the hood. (Engineer by trade, can't help myself) Questioning my basic understanding of circuit breakers and plug sockets: If a standard plug is rated to 13A, do you...
  13. F

    89 mobile home breaker and wire gauge question

    Ok so live in 89 mobile home ugh I really need lots of work but I'm on disability and I cannot afford electrician but I've been working with all kinds of cables wires and electrical probably unsafe as a kid but lol anyway there are way too many plugs on one circuit not what I'm here about tho it...
  14. U

    Unexplained breaker tripping

    👋 First time poster here. My name is Melissa and I’m asking for advice regarding my mom and stepdad’s home. He tried for 4 days to work the problem before I convinced my mom to call an electrician due to fire concerns, who also found nothing wrong. He told us to check appliances one by one to...
  15. 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...
  16. L

    For a 13K peak (10K running) generator, what gauge wire and breaker amperage is required?

    Installing a 13K peak (10K running) generator 190 feet from the panel. The portable generator is housed in a shed at the end of the property. What gauge wire and breaker amperage is required? Getting mixed information. Differing voltage drop calculators and breaker suggestions have me confused...
  17. T

    Is there such thing as 4kW, 115VAC , single phase equipment?

    Hi, We are being asked to make a power supply for a Bass amplifier......its 4kW, from 100-265VAC. Does that sound right? Woudlnt 4kW from 115VAC always be done with three phase? (this kit is for mulitple different countries)
  18. S

    20 amp breaker trips

    The 20 amp breaker that protects ceiling can lights trips with increasing regularity. It takes a few tries to get it to reset. The can lights (led bulbs installed 2 years ago) are on older dimmers. They worked fine until recently. Should I start by replacing the breakers, the dimmers, or...
  19. 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...
  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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