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techtalk:ref:elec01 [2018/01/26 16:13]
ixl2relax [Switches - AC vs DC Amperage Rating] 		techtalk:ref:elec01 [2021/11/10 05:34] (current)
ixl2relax [Ohm's Law]
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 |  12ga  |  30-amps |  16-amps |  11-amps | |  12ga  |  30-amps |  16-amps |  11-amps |
 |  10ga  |  40-amps |  26-amps |  17-amps | |  10ga  |  40-amps |  26-amps |  17-amps |
 +
 +Also see this list of [[techtalk:​evo:​elec01#​wire_gauges_-_by_circuit|Wire Gauge By Circuit]] for EVO Models.
 +
 +\\
 +
 +
 +===== Ohm's Law For DC =====
 +
 +{{:​techtalk:​ref:​elec:​ohmslaw.jpg?​400|}}
 +
 +The above values for DC power are: Voltage in whole Volts,\\
 +Current in whole Amps and Resistance in whole Ohms.\\
 +
 +For many basic symbols and formulas used in electronics,​ go to this page,\\
 +[[https://​tinkrlearnr.com/​shop/​uncategorized/​newbie-electronics-hobbyist-cheatsheet-poster-bundle|TinkrLearnr]],​ which has downloadable images and posters.
 +
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- +**Other Related Topics**\\
-===== Testing for Proper Grounds ===== +
- +
-It's possible to use a volt/ohm meter, or Digital Volt Meter (DVM), to check the resistance from any ground point on the bike back to the negative battery terminal. Such resistance checks can discover problems. To do this type of check, the meter is set on a low resistance scale (less than 100ohms if possible). The negative battery cable should be removed from the battery (to disable power on the bike). One lead of the meter is placed on the battery end of the battery cable (now disconnected from the battery) while the other end is placed on the ground point being checked. If properly connected, the meter should read a very low resistenace,​ nearly ZERO (usually less than one ohm). +
- +
-A quick and dirty test (although not able to detect borderline issues) can be performed with a powered test light connected between the battery cable and the ground point under examination. If the light illuminates,​ there is a circuit connection between the two points. +
- +
-**There is another method for testing grounds.** You can test ground connections using voltage checks. This uses the voltage setting of the meter and does not require you to remove the battery cable. With this method, you will use the battery itself to test for continuity to various ground points on the bike. A DVM is perferred for this method. +
- +
-First, set your meter to read DC voltage where 12 volts is easily measured (maybe the 20v scale or close to that). Place the red lead from the meter on the positive battery terminal. In fact, you should find a way to clamp it on that terminal (maybe using a plastic clamp). Be very careful not to short the positive terminal to any part of the bike. Now place the black lead on the negative battery terminal to take an initial voltage reading of the battery itself. This voltage should be close to 12.8 DC volts. Whatever your voltage reading, directly on the battery, will be called the REFERENCE VOLTAGE. +
- +
-When checking the voltage between the positive terminal of the battery and ANY GROUND POINT on the bike, you should have a voltage reading very close to the Reference Voltage (like 12.8v above). Every single ground point on the entire bike should measure within .3v of this reading. +
- +
-So, if you take the black lead to the other end of the negative battery cable, on the Powertrain Ground, it should measure very close to the Reference Voltage. If you take the black lead to the ground pin on the headlight connector, it should measure very close to the Reference Voltage. If you take the black lead to the ground pin in the taillight connector, it should measure very close to the Reference Voltage. If you take the black lead to the cylinder heads (next to the spark plugs), the meter should read very close to the Reference Voltage. +
- +
-IN EVERY CASE, the red lead is still on the positive battery terminal and the ground point you are testing should have a good connection back to the negative battery terminal through the ground connections of the wiring harness, the Powertrain Ground, the frame and the battery engine case ground point. If ANY GROUND POINT does not measure within .3v of the Reference Voltage, there is something loose, frayed, corroded or disconnected. ((Contributed to Sportsterpedia by IXL2Relax of the XLFORUM.net)) +
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 +[[techtalk:​ref:​elec02|Electrical Tools - Multimeter, Spark Tester, Etc.]]
  
-<font 20px> 
-Other Related Topics\\ 
-\\ 
-[[techtalk:​ref:​elec02|Electrical Tools - Multimeter, Spark Tester, Etc.]]\\ 
-</​font>​ 
  
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