What is the first step in sealing a cable?

What is the first step in sealing a cable?

• A. Remove outer jacket 2 in
• B. Cut the cable to length
• C. Apply sealant to insulation
• D. Install grounding wire

Answer: (A)

Removing the outer jacket is the first move because the sealant must bond to the cable’s insulation, not to the jacket. Exposing about 2 inches of insulation lets you see the surface condition and apply the sealant directly where it will seal out moisture and contaminants. If the jacket stays on, adhesive won’t adhere properly and moisture can get trapped under the seal. Once the jacket is removed, you can proceed to apply the sealant to the exposed insulation and then complete the remaining steps as required for the installation.

Removing the outer jacket is the first move because the sealant must bond to the cable’s insulation, not to the jacket. Exposing about 2 inches of insulation lets you see the surface condition and apply the sealant directly where it will seal out moisture and contaminants. If the jacket stays on, adhesive won’t adhere properly and moisture can get trapped under the seal. Once the jacket is removed, you can proceed to apply the sealant to the exposed insulation and then complete the remaining steps as required for the installation.