How To Avoid Improper Electrical Grounding

How To Avoid Improper Electrical Grounding

Electricity is both dangerous and necessary. While on one end, it can cause death by electrocution and damage your electrical system. On the other, it helps you charge your phones, use the refrigerator, and enjoy Edison’s creation of a light bulb.

If you have ever experienced a power outage, you know what it’s like to be without electricity. You feel lost, with nothing to do. No aim or direction, especially if you are an introvert.

Yet the same electricity can also set your house on fire if you don’t have proper electrical grounding done. Electrical grounding is necessary for your protection in case something goes wrong, like a short circuit.  

Therefore, before anything goes wrong, click here to book an appointment with an expert to assess the grounding in your Loveland, Colorado home.

And if you want to know how our experts at Lead Edge Electric avoid improper electrical grounding, then keep reading.

  • In the case of isolated power applications where there is no apparent connection to earth ground, the ground should be chosen as the expected return path from the power supply. You might have to hard-wire earth ground to this point if there isn’t an earth ground connection already made by the power supply.
  • A signal should not be grounded at more than one point. Typically a cable is grounded at its source.
  • There is one exception to this rule – in small-signal applications when we are grounding cable shields.
  • Another exception is where in DC powered equipment, earth ground is connected to the terminal power supply. An additional connection to ground local should be made in the instrument. This stabilizes applied voltages and provides a local, low inductance and low resistance path to ward off destructive energy for internal suppression devices.
  • For EMC, a wired signal between devices needs to be grounded at the cable’s end, near the noise source or nearest noisiest device.
  • Not providing a path to the ground from where the noise origins may cause the cable or the shield to act as an antenna by increasing the noise’s power. This will also allow it to spread to other areas of the circuit, and magnify system emissions.
  • Do not make only one ground connection to the chassis. As per the code, many devices are required to have a safety ground connection made from their metallic chassis or enclosure. However, the chassis shouldn’t be used as a return path for fault current. The chassis connection to earth ground sometimes is used as the center of a star grounding scheme.
  • A number of instruments have a plastic enclosure and may lack a connection to earth ground through their chassis, causing them to rely on direct-wired earth ground connections at their terminals. Their signal connections are grounded at the end of the I/O cable nearest to the instrument because it needs a low-inductance path. Therefore many filters, transient suppression devices, and capacitors can shunt destructive energy to earth ground without facing high resistance and inductance in the path.
  • All AC-powered wires should be routed away from signal paths and sensitive signals. Don’t mix high-energy or noisy power or signals with low-level signals.
  • Don’t duplicate the earth ground connections at different points in the main power line. Connect all AC-powered devices to the same outlet. You can use a star-grounding concept while making connections of earth ground to the circuit.
  • Do not mix isolated signals inside the same conduit or shield.
  • Connect conductive materials like unused shielded conductors to ground at one point (to the load) instead of letting them float freely. Ground the cable shield at both ends or the signal source. Minimize the looped areas and length of the wires that come out from a shielded or bundled cable, right before the wires make a connection to the equipment.

To minimize the risks, contact Lead Edge Electric for proper grounding. Click here to book an appointment in Loveland, Colorado.