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CT Shorting Blocks with and without covers. Ships in 1 Day.   Shorting Blocks prevent CT burn up, installing on a hot system.  Delta System with 2 CT's use shorting block SB-4TC. Wye  System with 3 CT's use shorting block SB-6TC.   Shorting Blocks Model No Description   Price SB4T 4 Terminals  No cover IKU-4S 35.00 SB-6T 6 Terminals  No Cover  IKU-6S 45.00 SB-4TC 4 Terminals With Cover IKU-4SC 40.00 SB-6TC 6 Terminals With Cover IKU-6SC 50.00