Loose Connection Loss Estimator (I²R)
Estimate watt loss and annual cost caused by added resistance (loose/oxidized/under-torqued connections). Great for explaining impact to customers.
Use measured load current if possible.
Typical “bad” connections can be in the ~0.5–10 mΩ range (varies widely).
How long the load runs per day on average.
Use the customer’s utility rate or a local average.
Power loss
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Energy loss
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Estimated annual cost
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This is only the I²R loss—doesn’t include damage risk, downtime, or failure cost.
Safety note: Loose/oxidized connections can escalate rapidly and cause arcing, heat damage, and failure. Use this tool to quantify impact, not to justify continued operation.