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  1. J

    Voltage drop question

    I have a run of conduit 172ft from a 12x12 box which branches out to parking equipment with runs about 50ft from the box. My voltage drop calc requires me to run #10s to the 12x12 box. My question is from that box can I size down to the respected size of wire my machines need (#14awg) to branch...
  2. T

    My question about the lightning rod

    There is a lightning rod on the house. But is it safe to use? Lightning can cause damage to, for example, a tree, destroying it completely. It's not stupid to attract lightning to a house with a lightning rod. In addition, the power of the lightning is so great that it is unlikely to be...
  3. S

    Regulations Question UK outdoor socket

    I guess there are a thousand question like this, but I couldn't quite get if I can do this myself or need an electrician. I have a garage separated from the house that has it's own supply (a big armoured cable that comes from the house) that goes into a 10A RCBO (exactly this guy: GE DP100...
  4. C

    Question about bathroom fan MORI dMEV II HT - humidity control version

    Hi, a few months ago this fan was installed in my bathroom, but it seems to be less effective than the previous one. The humidity setting is meant to be adjustable from 50% to 95% (i.e. it will come on either at a low or high level of humidity). Can anyone tell my where the arrow has to point to...
  5. O

    Inspect and Test Question

    Hi all, Probs a simple one here but when testing a 3 phase board for ze as part of a periodic inspection plus part initial verification of a small db supplied by this board should I note the main 3 phase ze within the supply parameters section of cert and then the small db as zdb within the...
  6. C

    20kVA single phase generator grounding question

    How should grounding be made to a 20kVA single phase generator set feeding a domestic property via a manual change over switch? At the generator's alternator neutral is bonded to earth. The generator will be some sixty feet from the mains input box of the property fed by SWA cable. The...
  7. fanito

    Simple question about converting 240v to 120v

    Hey guys, need some advice, please... this is probably a dumb question but hey, want to make sure.... I am going to replace an electric cooktop that is 240v to a gas cooktop that runs in 120v for the "minor" things. Anyway, since I don't need the 240 jbox (no proper outlet but it is under the...
  8. B

    question about battery capacity

    I have a electric wheelchair that is 24V 55AH (12 55AH X 2 in series). i have 2 X 12V 45AH that i want to add to it. what is the best way to add them to the circuit. please explain to me why the way you suggest, is the best?
  9. C

    Automotive question here.

    Looking to have a on/off switch for a set of 6 wires. 12 wires in all. These sets of wires dont need power but just to connect one side to the other. Brown brown, Green green, Blue blue etc. Im adding small amplifier to the sound system for my 23 Buick. Problem is it has a Active noise control...
  10. Sara Davies

    Question for a new product: uni student. What jobs are done on the floor / kneeling most?

    Good day I'm a university student on a product design course. To create a product around electricians day to day work making your lives easier. My main question is what work do you conduct most on or near the floor? What tools are used in those jobs? lastly what are your issues an...
  11. A

    Question regarding a fused disconnect fuse size

    I have a question. I am installing a steam generator. The unit draws 42 amps. I have a two pole 50 amp breaker at the service box per the instruction manual. Used 6 awg. The unit needs a fused disconnect at the generator. I have a two fuse 60 amp disconnect requiring two fuses. My question is...
  12. D

    Car battery question

    I have just bought a new battery for my car. It's a Varta battery. Before fitting to the car I tested it with my Topdon BT50 tester and was surprised to find that the health was only 69% 689A. Charge was 100% 12.65V. Should a new battery have a health of 100% ?
  13. B

    Can I get help with the question

    Hey so I need help understanding this question and understanding it in the NEC.The service to a multistory building is 277/480-volt, 3-phase, 4-wire. There are 125 120-volt, duplex, general-purpose receptacles to be installed on each floor. A 3-phase, 480-volt primary, 120/208-volt secondary...
  14. M

    Tricky Starter Circuit Question - 2001 Toyota Celica...

    I have an interesting starter circuit issue on a 2001 Toyota Celica (that won't start). If I have the starter out and have the main positive wire connected, then, run a jumper wire to the solenoid directly, if the starter is grounded to the engine, vehicle fans come on etc. when I set the...
  15. mikeysmith

    Garage buildout Question

    Hey all, I bought a big garage that I’m going to subdivide and rent out. I am going to hire an electrician to do all work. This is not a DIY question. I just wanted to ask for advice here before hiring an electrician, so I know what I’m getting into. Thanks in advance. The space is 2500 sqft...
  16. GTR450

    Question about discharging nimh cells in parallel

    Hi, I have question about paralallel discharging NiMH modules. I have 40 modules and one modul consist of 6 x 1.2V cell = So nominal capacity is 7.2V. These modules are in car connected in series. But I replaced 15 bad cells and now I need balance them. In one thread I have got good advices but...
  17. A

    GFCI breaker question

    I have to replace the GFC I on the right w red button (keeps tripping) which is now discontinued by Eaton. I bought the one on the left used but tested good which is the same CH type as the other one but it’s a little longer but still fits in the box. Any issue using it? Both 120v 20a.
  18. N

    Wiring Question Chandelier

    I have a new 15 arm chandelier, each arm has 2 lights which use G9 LED bulbs (3W equivalent). Each arm also has four wires coming into the base of the chandelier. My question is what is the best way to wire/bundle all 60 wires so they hook up to the hot and neutral safely. There are 30 wires...
  19. S

    Question regarding installation of dimmer switch

    I successfully installed one new dimmer switch today, but ran into an issue with the second. There are two one-way switches: one switch operates the light of our ceiling fan and another switch operates the fan. I want to change out the light switch to install a dimmer on it. When I examined the...
  20. M

    Maximum permitted Zs question

    I am a lecturer teaching electrical installations and in reading through the on-site guide to prepare a lesson I have come across a section I have not seen before. On page 146 near the bottom, the OSG talks about applying an ambient temperature correction factor to the maximum Zs values given in...

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