how can you tell the diffrence between black pipe thread and electrical conduit thread?
924721
All pipe threads are tapered so that as they are tightened they "jam" together to assure a pressure tight connection.
205629
www.ebay.com  drawings on there now\n\nwww.lanset.com/buzz/jeepwrg.html has them online\n\n  The voltage doesn't make any difference except for replacing bulb, generator and starter. The wires will not change.
570534
so... i think you have to do this: first you light one thread at both ends (let's call this thread 1), and the other (thread 2) only at one end. When thread 1 burns completely you have measured 30 min, so you light the other end of thread 2. When thread 2 is burnt you know 45 min have passed since you started this process...
447990
You could use Bernoulli's equation between two points to solve for the velocity of the fluid in question.  Area of the pipe (or area of the cross section of what the fluid is flowing through) multiplied by the velocity will give you the discharge.  If you aren't familiar with Bernoulli's equation, see the source below.
942921
Voltage is the amount of "potential difference" present - an analogy with water would be the pressure of the water\n\nCurrent - measured in Amps - (Coulombs per second) the flow of electrical charge - an analogy with water would be the thickness of the pipe.\n\nVolts x Current = Watts\n\nJust as\n\nWater pressure x pipe thickness = amount of water pumped\n\n\nSo a 12volt bulb taking 2 amps will be 24 Watts\nA mains bulb at 240Volts with 0.5 amp will be 120 Watts
1038988
You need to look up ASTM A120. That is the standard for galvanized pipe.
1125882
The best thing to do is to use a table of wire gauge versus current and resistance.  The tables usually provide resistance per linear foot  so that for a given length of wire of a particular gauge, you can determine its resistance.  This is important because the wire's resistance combined with the current that your load draws will cause a voltage drop across the wire so that you do not have the same voltage at the load as you provided from your power source. This follows Ohm's law (  V = IR).  You should size the wire conservatively and follow local codes if this is for commercial or residential purposes.
386585
Take a look at the file http://www.fotosearch.com/comp/ARP/ARP116/B_Wire_2.jpg .  Hope this helps!
1058248
Good Morning!  Saw this one and had to try my hand.  If the "knob" is not screwing down all the way?  and there is thread damage to the parts?  That is called cross-threading.  Some also refer to this as "galling".  In some situations?  the thread "pitch" of one part could differ from the other causing the problem as well.  Hope this helps in some small way!  Hyway.
755934
If any site would have this, I would think the Army Corps of Engineers ERDC Cold Regions Research Lab website, listed below, would have this. It's got to be there somewhere!\n\nGood Luck!
406721
A 200mm (8 inch) diamter pipe pvc pipe varies on which type of pipe you are looking for, a water pipe has thicker walls to withstand the pressure whereas a sewer pipe has thinner walls because there is no pressure.\nPressure pipe comes in a standard 6.200m (20ft) length while a sewer pipe come in 4.200 (13 ft0 length.
823887
pipes, electrical wiring, coins
1137080
There is no one correct answer. In general, black is used for negative. For AC, white is most commonly positive and for DC, red is positive. These are generalizations and there are exceptions everywhere. Most important is to pick a standard for your use and adhere to it religeously. If in doubt when working with other wiring examples, ask for expert help and/or use a meter.
166834
Here are some links with pictures:\nhttp://msucares.com/pubs/images/p1302-6.htm \n(the above address had a picture)\n\nhttp://sewing.about.com/c/ht/00/07/How_Thread_Needle0962932897.htm\n(the above address has thorough directions)
827069
The meter should have some literature with it.\n\nWrite to the manufacturer and ask for it.
796923
It all depends on what the incomer is made from, Metal, PVC?\n\nI take it the incoming pipe is metal? If so the rule is, if you can stand and touch that pipe and other pipes at the same time, you should cross bond between them. The reason for cross bonding is so as not to have a difference in potential between the pipes if an electrical fault occurs, if 1 pipe is earthed and one isn't and you touch both pipes you will get a shock if both are bonded you will not get a shock.\n\nIf in doubt cross bond them, always better to be safe than sorry!
87578
P = EI (Power equals voltage E times current I)\n\nMany electrical properties can be explained as analogous to water flow.  For example, a transformer "transforms" high voltage and low current into low voltage and high current, keeping the power constant (except for minor losses) at full load.\n\nThis would be equivalent to a high pressure water pump supplying low water flow to the primary winding and taking out high water flow at low pressure from the secondary winding to drive a low pressure water turbine.\n\nYou could represent the transformer core as a hollow square of wood or even thick cardboard.  On one side wrap say ten turns of thin clear plastic tube around the core to represent the primary (first) winding.  On the other side wrap say five turns of larger diameter plastic tube around the core to represent the secondary (second) winding.  Fill the primary tubing with water and red food coloring to represent "hot" high voltage and the secondary tubing with water and blue food coloring to represent "cooler" low voltage.\n\nThe explanation of course is that the high voltage primary winding will have more windings of thin tube (similar to more thinner copper wire windings) because the current will be less than in the secondary winding.\n\nThere will be less windings for the secondary coil using larger tubing because the current will be higher at low pressure.\n\nSupply the secondary tube with a shut off valve (or clip) to represent the fact that there will be no current unless the circuit is open.  In the formula, if current is zero power is also zero (on both sides of the transformer).\n\nYou can represent the pump and turbine with pictures (or drawings) of same but it would not be impossible to rig an actual pump and turbine, just not necessary to "see" what is happening.\n\nThe turbine can use up more and more power until the maximum power of the primary winding is reached but not more.  The magnet of the core will be "saturated at full power."\n\nThe rest is explaining magnetic flux in the core and how it is produced by the primary winding and cuts through the wires of the secondary to produce voltage and current if there is a load.  Each winding of a coil adds to the effect.  A transformer with equal primary and secondary windings would have the same voltage and current under load.  I believe that the phase would shift 180 degrees because of lead/lag.   Good luck.