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Photo of a cable reel
BIS Consulting provides decision-support services that bridge the gap

between budgeting and engineering that exists in most utilities.


Aging distribution cable is a problem faced by all electric utilities. The insulation on XLPE insulated cable installed starting in the 1960s has begun failing. This affects reliability and sets the stage for aggressive intervention: injection to refurbish the insulation, replacement with modern cable, or testing.

The case for intervention rests on three arguments: increasing faults are affecting reliability; concentric neutral is corroding, which could create a safety hazard; and cable has reached its service life, so intervention is due.

Teaming with our clients’ subject-matter experts and asset managers, we jointly develop economic-life models, helping them optimize their cable programs, balancing the trade-off between the cost due to increasing risk of failure as cables age against the benefit of delaying capital expenditures.

Our clients use these tools to identify the strategy that minimizes total
life-cycle cost, including cost to customers. Deliverables may include:
• Business case, suitable for regulators
• Replace/inject decisions
• Evaluation of repair programs
• Benefit/cost assessment of testing
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