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How to bend the wires in a distribution box by 90 degrees

To bend wires or conduit by 90 degrees in a distribution box, use a conduit bender, measure carefully, and bend slowly to avoid kinking or damaging the wires.Tools and Preparation
  • Conduit bender: Choose a manual or hydraulic bender suitable for the conduit size (common EMT sizes: 1/2", 3/4", 1"), .
  • Tape measure and marker: Measure the distance from the end of the conduit to the start of the bend (stub height) and mark it clearly .
  • Level or angle guide: Ensures the bend is precisely 90 degrees .
Step-by-Step Bending Process
  1. Measure and mark: Determine the stub height (distance from the end of the conduit to the start of the bend) and account for the bender's take-up length. Mark the start of the bend on the conduit .
  2. Position the bender: Place the conduit in the bender's shoe, aligning the mark with the reference arrow or star on the bender head .
  3. Apply pressure gradually: Step on or hold the bender securely and pull the handle slowly to bend the conduit. Avoid sudden force to prevent flattening or kinking .
  4. Check the angle: Use a level or hold the conduit against a flat surface to confirm a 90-degree bend .
  5. Adjust if necessary: Minor corrections can be made by carefully applying additional pressure, but avoid over-bending .
Safety and Best Practices
  • Limit the number of 90-degree bends in a single run to four (360 degrees total) to prevent wire damage and maintain code compliance .
  • Ensure the bend is smooth to allow easy wire pulling and prevent insulation damage .
  • Practice on scrap conduit if you are new to bending to improve accuracy and confidence . By following these steps, you can achieve a clean, code-compliant 90-degree bend in a distribution box, ensuring both safety and professional appearance of your electrical installation .
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