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Substation Connector Ampacity

Substation Connector Ampacity

Substation Connector Ampacity

Hello all,
My question relates to CT connections on the primary bus in our substations. Most of the CT's we run in our station have 2 bolt connectors but are rated well above what we would typically allow a 2 bolt connector to carry. I'm specifying jumper size based on transformer ratings but at the CT connection I'm going to end up with something like a double run of 500 MCM copper going into a 2 bolt connector which seems silly. Is there a good rule of thumb for bolted connection ampacity? I'm thinking we are likely underrating our bolted connections as we would typically run a 4 hole NEMA pad for anything greater than 500 Amps or so.


RE: Substation Connector Ampacity

You could add a piece of bus bar with the required holes for the CT and for the lugs.

RE: Substation Connector Ampacity

I assume these are free standing CT's, and if so I believe they can be specified with different connectors.

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