circuit

  1. P

    #Share: 7 full wave rectifier circuit using two diode or SCR

    Working principle of 7 center tapped full wave rectifier circuits ?????? What is center tapped full wave rectifier? 7 full wave rectifier circuit using two diode or SCR 1. Rectifier circuit with resistive load using two Diode 2. Rectifier circuit with RL load 3. The center tapped full wave...
  2. P

    What is 3 phase bridge rectifier circuit?

    5 bridge rectifier circuit diagram ?????? 1. Three phase bridge rectifier circuit with resistive load 2. Rectifier circuit with RL load 3. Rectifier circuit with RLE Load 4. 3 phase rectifier bridge circuit using filter capacitor 5. Controlled rectifier circuit Link post...
  3. J

    Electric heater blows up but circuit still works for fan.

    My Lasko electric heater stopped working and I thought it just played out so I replaced it with another heater that worked fine for a while, but when I went back to check it was also not working. A fan is on the same circuit and has been that way for years, the fan still works fine. Is this...
  4. A

    USA GFCI circuit protection when replacing old non grounded receptacles

    Hi All, I’m a retired electrician from the Detroit area. My question is, I need to replace some old two prong receptacles in my daughters 75 year old home. Code says I can install a GFCI receptacle in the first receptacle of a group of receptacles and install standard three prong receptacles...
  5. WfpEnt

    USA Need to find out if I can run my plasma cutter on an existing circuit.

    I just picked up a Thermal Dynamics SL100 plasma cutter. I have 220 circuit in my shop but I don't think its up to the task. Its about a 40 foot run to the shop from my 200 amp panel. Currently the circuit has a two pole 15 amp breaker with 10-3 wire. The requirements are below. Can I just...
  6. L

    No power to any circuit

    Please don't all kill me here but, I replaced 3 lights tested those 3 and all working. Went to do a 4th a restored power and now the rcd trips. Put everything back to how it was and no power to any outgoing circuits but all circuits have 240v. No tripping at all unless I put in a plug top...
  7. L

    Max Wattage on a Circuit with Newer Bulbs

    An electrician once told me that I should always be careful not to exceed too much wattage on each circuit in a house by replacing light bulbs with brighter ones that are of higher wattage (e.g. don't replace all 60W bulbs with 75W or 100W bulbs). However, with the newer CFL and LED replacement...
  8. timhoward

    Mix of old and new colours for singles for same circuit

    New one for me... Commercial building (museum), 3 phase board 16A MCB, 3 x 2.5mm singles run in 20mm conduit, ending up at an FCU. All fine. The singles are red, blue, and yellow/green. Red is used for L1, Blue is used for N My gut reaction is that this is just too confusing and needs sorting...
  9. S

    Can I bypass the 13 amp outlet on my cooker circuit?

    Hello everyone, I am no domestic electrician but I do work as a designer in the railway, low voltage signalling circuits etc. My question concerns my oven. I have just bought a second hand double oven of the internet and went to fit it in my rented house. The existing oven is connected using a...
  10. T

    Rcd tripping on new hot tub circuit

    I'm having a problem with the CU rcd tripping out, I have installed a feed outside to my daughters hot tub using 6mm cable about 14mts in length going to a metal clad dis board and from there via a 32A mcb to a 32A switched socket, insulation is good, no damp, but when I connected up the tub the...
  11. F

    Main incoming rcd tripping on any circuit

    My main incoming rcd is tripping out as soon as any load on any circuit. Have pulled each circuit out of the board live and neutral in turn but failed to isolate it to any specific circuit, is this likely to be the rcd at fault?
  12. W

    EICR ring circuit question

    Doing an EICR and was looking for some advice, testing the socket circuit, it’s a ring circuit. 3 sockets in the living room area, opened 2 up and they both had one cable at it (great). Opened the 3rd and it had 4, so obviously the other 2 sockets are fed from here. Now I know you are allowed to...
  13. P

    Batteries for a simple horn circuit.

    My question is 'What battery do I use'? I am trying to to build a simple horn circuit for my wife's mobility scooter. My idea is to use a 6 or 12 volt motorbike horn, a battery and a switch in a simple circuit. I want something that is completely separate so it can be swapped between scooters. I...
  14. E

    Cooker Circuit with Washer/Dryer On Circuit

    Hi all, Looking for some advice if possible please! Got one if then jobs that you get roped in to and that’s turned from a quick simple tasks to maybe a small can of worms. The customer wanted her oven connecting as curry’s have installed the hob but not the oven. Cooker circuit -...
  15. B

    Help with complex circuit calculations

    I'm having a few problems finding these values in this complex circuit. I've tried several different methods but still cannot find a step by step process of finding the right answers. Can anyone help? It's been a while since I was at college! Thank you in advance ?
  16. Rockingit

    Best way to use a CAT5 as a switch circuit?

    I’ve got a bunch of 230v stuff in one place, a 230v device In another and an inherited data cable in a duct between them. Don’t think it’s an option to draw a new mains rated cable due to damage to the duct but the data cable is good. So how do I use a relay contact one end to trigger another...
  17. S

    USA Residential garage: single 220v circuit for multiple tools?

    Looking for some advice and insight on best practices here. I have an attached garage 25 feet away from my main 200amp service panel in my home. I want to use a mig welder, a 3HP table saw, and a 2HP belt grinder in my garage. I have plenty of room in my panel to add a circuit for each, but to...
  18. J

    Need Help to clean circuit board

    Hi, I have opened my sunroof and there is a circuit which is blacked with some stuff, it the circuit where the sunroof control buttons slides to open or close. I tried using contact cleaner but it didn't work. If i scratch it with a sharp tool its getting off, but i am afraid it would damage...

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