8. When do I need shielded lead wires (electrical noise)?

Environments containing high voltages or in the presence of electromagnetic fields (EMF) may require shielded lead wires. These environments generate what is commonly referred to as “noise” (EMI) within a sensing instrument. Lead wires act as antennas.

Two common techniques may help alleviate the influence of electrical noise:

  • Twisting the leads will help offset the induced noise. 
  • Lead wires may be covered with a “shielding”, commonly silver plated copper braid (SPC Braid). Grounding the shielding at the instrument only provides the best results.

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