Cable ampacity – insulation temperature rating vs. equipment terminal ratings

210H

This can be a confusing topic. The issue usually arises in nuclear power plants because most cable is rated at 90 degrees C, but equipment terminals are rated for 60 or 75 degrees C. Getting this wrong leads to costly rework down the line. Continue reading “Cable ampacity – insulation temperature rating vs. equipment terminal ratings”

Relay manufacturer quietly changes internal parts, creates potential safety hazard

700-RTC_SolidStateTimingRelay

Sometimes product manufacturers change out the parts in a particular equipment model without changing the model number. Even though there is little to no change in function or feature set — the change is invisible to the customer — when regulations are involved these invisible changes can have severe consequences. Continue reading “Relay manufacturer quietly changes internal parts, creates potential safety hazard”