I have a customer that has installed butt splices in 4000:5 Cts inside a padmount transformer. CTs are installed on the secondary (lo side) bushings and are routed via conduit to a remote relay house for 59N ground protection. Inside the transformer the contractor installed butt splices with heat shrink to connect CT secondary wiring to the leads running to the relay house. I believe the correct action should have been landing the wires on a terminal block instead of butt splices but find nothing proving this is not allowable.
With the relay connected, the burden of the wiring is well within the allowable limit of the CT.
u/Kalbi_Rob — 12 days ago