Grounding is important to method manner.
Electrical grounding is oftentimes overlooked in electrical designs and method installations and deployment. Correct grounding is main to make certain usual operations. All electrical currents seek the method of least resistence as a basic code of circuit operation. Grounding provides this path of least resistance where once a current is generated by a power supply, it will flow through all circuit components in an effort to reach the ground point, similar to water flowing downhill. If grounding is not properly done, this natural current flow is interrupted resulting in electrical arching and electrical signals cross coupling or interfering with other circuits. In large power distribution systems where large currents flow, improper grounding can cause fires.
Instructions
1. Locate all grounding points in an electrical system. For example, in a case where you have circuits encased inside of a metal enclosure, the metal enclosure attached to mounting rack and the rack attached to a metal floor, you need to locate the grounding points from the circuit board to the metal enclosure, the metal enclosure to the mounting rack and the mounting rack to the metal floor. Once located, identify the grounding straps or grounding apparatus used to ground or connect the two points.
2. Clean or wipe the points where the ground strap or apparatus connects to metal. Ensure you remove all corrosion or dirt from the connection points. Do this for all points.
3. Use an Ohmmeter to measure the resistance that exist at the grounding point. Tighten any lugs mounting grounding straps to metal and repeat the test. If you still see a resistance higher than 1 milliohm, disconnect the grounding strap from the metal and check the integrity of the strap to ensure it's not frayed or torn. If applicable, replace the strap. Place one Ohmmeter lead on the ground strap or apparatus and the other lead on the metal. If you read 0 resistance or under 1 milliohm, you have a good ground connection. If you register any resistance above 1 milliohm, check the ground connection. Apply a conductive adhesive to the end of the grounding strap, the mounting bolt and the metal where the grounding strap and the bolt attaches to the metal. Reattach the strap. Follow this procedure for all grounding points.
