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  1. M

    Crappy OEM electrical cords. Who hates them and what did you do?

    Easy to rectify Buy the best quality ironing spare cable with plug in one end and crimped eyelets in other Silicone wire insulation and then doublespun with very strong and totally flexible sleeve. End of story Ola
  2. M

    Do modern, auto-darkening welding helmets "go bad"?

    ESAB is top quality in everything they do. And they only employ top grade people, from the store clerks to the metal scientists. And everybody in between. Look for the NASA movie ( New Orleans factory??) where they stir weld together large "pipe" parts to create a tall rocket outer tube...
  3. M

    Precision measuring tools.

    All are good and very usable tools. The micrometer in the little wooden box very good. Perfect for the home machinist. KEEP THEM Ola
  4. M

    Anyone use DC (low voltage) in the shop?

    I do. All the time Buy 220 V LED strips for work table. Great illumination. With 3 units 0,8 m above table no shadows at all Throw out the RF generating chopped 220 VAC to 158 V DC garbage converter. They radiate RF up to 8 MHz, making sensitive electronics, such as radios, impossible to...
  5. M

    Electrical grid question

    Sorry for the lambasting. Most US utilities are underfinanced, not properly regulated and use ancient switchgear and protection systems. The medium voltage ( 4-72 kV) polebased bare conductor distribution nets are totally dangerous. Ola
  6. M

    Interesting modifications to arbor press (This Old Tony video)

    I worked in a big iron ore mine in Liberia. We had workshops for everything, including various type of gears, pulleys etc. Our machine to make slots for keyways was called a " pull-broach" Made by a German company, The broaches had a teeth increase of 0,1 mm and were pulled thru the hole. Ola
  7. M

    The end of Starrett

    STarrett, top of the line. The only one up there with the absolutely best of their Swedish competitor, CEJ. CEJ left the market for tools a typical advanced precision machine shop quite a few years ago. They are now making advanced measuring tools for robot manufacturing lines. Sic transit...
  8. M

    The High Cost of Repair

    My $ 0,02 input Manufacturers price spares out of all realistic values to NOT keep units working . They want you to buy a new unit, most of which are manufactured in Asia by slave labor. Ola
  9. M

    Metal Lathe Cutting Oil ... Where does it go?

    Make a Lexan radius shield that travels along with the tool post to catch most of the cutting fluid. For aluminum I use only denaturated spirits. Ola
  10. M

    Column Bases to be buried in concrete

    Wonderful project. I would contact a building engineer. At least get the basic calculations on walls, roof, windload correct. And with luck, also professional feedback from a couple of similar jobs. Lucky you, wonderful building. Ola
  11. M

    Maximum distance of a telephone line?

    The capacitance between and to earth of the wires is a large factor in maximum distance. Can be counteracred by inserting series inductance units. Was commonly used in Swedish Army Signal Corps temporary installs over several 10s kilometers However, will reduce the bandwidth. Ola
  12. M

    Reactive Power

    Being a firm believer in understanding the math and physics in electrical circuits I believe that being able to calculate a circuit before tearing into it, is the way to go. For DC static circuits quite easy. For switched DC, some understanding of Lenz law and derivate calcs help a lot. For...
  13. M

    Electrician Apprenticeship

    Great. Push him as much as he will allow. And it is a field where you are well served and much sought after if you also put in some time and effort to study the physics behind electrical stuff. Start with the easy and proceed to three phase systems. A bit of math helps a lot. Especially the...
  14. M

    3/8" and 1/2" Drive Sockets, Can I get Away With Impact Only and not Chrome?

    I have worked a lot with large ( > 250 MW) generators and high voltage ( >275 kV) switchgear. Only tools allowed are steel or aluminium with sand blasted surface. Even minor spalding of the chrome surface is a very real danger. Ola
  15. M

    What's wrong with this?

    no relay protection system can prevent that. A modern protection system disconnects both ends of a HV line with even a VERY short ( < 20 ms) single, 2 phase or three phas groundfault in < 40 ms. If the line is equipped with differential protection, even shorter. The energy stored in the line...
  16. M

    What's wrong with this?

    What i wrote "overhead HVMV service caused catastrophical fires" Overhead HV MV . The HV part is transmission. That caused the fire if the newspaper info I have is correct. And I love the leaning MV pole distribution networks with transformers at the top. Great for the company selling back...
  17. M

    What's wrong with this?

    Mike said "Much of this country has overhead service and switching to underground is prohibitively expensive." That overhead HVMV service caused catastrophical fires in California and I think it also led to the utility went broke. Some of the fire problems may have been the result of very...
  18. M

    What's wrong with this?

    Quote from Sparkys answer " Maybe that's what you meant and didn't mean to generalize all exterior top entry installations?" I definitely mean that under no circumstances shall cable/ conduit entries be from the top in ANY panel/box that is situated outside. School of hard knocks from many dry...
  19. M

    What's wrong with this?

    Sparky. If you would care to read my entry. Water runs downwards. And your Q "These are outside with top entry. What's the problem with that?" is quite self explanatory for a person living in the Mojave desert. I have seen many utility weatheads in Clarksdale Ms. Ie on the building housing...
  20. M

    What's wrong with this?

    A box with a top entry. Outside. Great if you like water cooled electrics. And since power company readings for charging today are made by radio signals, what is the point of having this 1940´s contraption outside ? But as I have admitted in earlier US domestic electric stuff, I am TOTALLY...
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