Middle East Query—Water-Block and Rejuvenation
In this installment I address question 16.
16. What if my cable strands have water block design elements?
For those circuit owners that specify strand-blocked cable—stop! The cable manufacturers charge you more, but for what benefit? An understanding of how water distributes itself in a cable provides no justification for the additional expense. Click here to read an article in the November/December Issue of IEEE Electrical Insulation Magazine, “Molecular Thermodynamics of Water in Direct-buried Power Cables.” The “Molecular Thermodynamics” article provides data and a theoretical framework to understand the negative impact of stand-blocked conductor designs.
For now, Ma’a salama (معالسلامة/Good bye)
The messy polyisobutylene strand-blocking material provides a dubious benefit. If you use this stuff, I won’t be able to help you when your cable becomes unreliable.