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How to check the integrity of the outer sheath?

The integrity of the outer sheath shall be checked after cables have been buried by an insulation tester (Megger) at 1000 Volts. The test shall be conducted for 1 minute between each wire screen and earth after the cable has been jointed and terminations installed. For cables after repairs, the resistance must not be less than 10 meg-ohms.

What is a a sheath used for?

A sheath is an encasing device used in the vein or artery during different cardiac procedures. They assist with guide wires and catheters to be threaded through the vein or artery toward the heart. It is important to monitor the site of the sheath insertion during and after removal.

What is outer sheath insulation resistance test?

Outer Sheath Insulation Resistance (Screen wire test) The purpose of the test is to determine soundness of the outer polyethylene sheath against water ingress, mechanical damage and termite attack. Values below 0.5 meg-ohms (500 kΩ) can indicate sheath damage.

What is a sheath in cardiac surgery?

As we learned, a sheath is an encasing device used in the vein or artery during different cardiac procedures. They assist with guide wires and catheters to be threaded through the vein or artery toward the heart. It's important to monitor the site of the sheath insertion during and after removal.


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