I have a 1600amp main breaker CT cabinet with a panel board bussed to it, my customer is looking to split his service to two separate metered services. We are looking to make second service a 400amp metered service. existing is 120/208 3 phase. service primary is being fed from transformer located exterior of building primary conduits are coming underground from transformer to 1600amp main breaker. Question is can you tap off of primary conductors before 1600amp main in bottom of CT cabinet exit CT cabinet and feed second 400amp metered service..